Chapter 4 - Building Rotation Control

4.1 INTRODUCTION

The building for NTT was delivered by the contractors, complete with all necessary electrical equipment. In order to perform computer control from the VME side, the building control panel has "automatic control" selection switches for the various functions. Note that this "automatic control" means controlled with the VME computer as opposed to push-button control.

This section describes the control interface and an operating procedure. Each building subsystem is described in a separate section.

4.2 REFERENCE INFORMATION

The following sections give specific information:

Section 4.12 gives the abbreviations of all the signals connected to the VME system of the building.
Section 4.13 gives a computer list of all the computer I/O signals.
Section 4.14 provides a list of the available drawings and data sheets plus maintenance information.

4.3 SUBSYSTEMS

The building automatic control is built around a VME system containing an Ethernet interface to communicate with the main computer. The VME system controls the following subsystems:

Bottom Seal.
Flaps.
Building rotation.
Sliding door.
Slit Shutter.
Windscreen.
Emergency stops.

These subsystems are described separately in the following sections.

Note: The Air condioner is a self supporting unit, provided by the building subcontractor. In case of a malfunction, a checkout at the Air condioner Local Control Unit must be carried out.

4.4 BOTTOM SEAL

The signals in Subsection 4.12.1 explain themselves; two output signals are provided: to inflate or deflate. In addition, two corresponding input signals which sense the status of the bottom seal. The last signal informs the VME computer if the bottom seal function is in automatic selection mode, i.e. can be commanded via the VME computer.

A hardware interlock is provided so that no building rotation is possible when the bottom seal is inflated.

The sequence to inflate is:

Check that BSAUTSELI* is asserted.
Assert BSINFLO*.

After 50 seconds :

Check BSLSINFI* (it must be asserted).
Negate BSINFLO*.

For deflating, the sequence is the same, but use the signals BSDEFLO* and BSLSDEFI*.

4.5 FLAPS

A similar I/O structure as for the bottom seal applies to the flaps.

Maintenance Information

The Trivolt power supply has to be adjusted according to the cable length:

+5V powers the encoder and line driver.
-5V is used in the encoder only.
+"V" (see schematic diagrams) powers the line receiver via a voltage regulator. It has to be adjusted such that the dissipation of the regulator is minimized. This means a regulator input voltage of approx. 8 V. So the final adjustment is dependent upon the cable length.

4.6 BUILDING ROTATION

The building rotation (called rotation in the following section), is controlled via position sensors between building and azimuth box.

The Control System is in principle a self supporting system, i.e. it does not need any servo loop software. It will be explained in detail in Subsection 4.6.1.

4.6.1 Rotation Position PI Controller

This PI controller is especially designed for the building rotation, and has the following features:

Two sensor inputs which accept the two position sensor signals.
A position offset analog input in combination with a digital enable signal.
A breakout point for implementation of a filter.
An interlock which triggers on a maximal angular difference between building and azimuth or a position sensor malfunction.
A building drive enable output which enables the building drive system.
A galvanically isolated velocity reference output which is connected with the rotation velocity loop control.

Sensor Inputs

The sensors are Hottinger Baldwin type W50TS combined with an amplifier type MGT 233.0. The two position outputs have a sensitivity of 0.2 V/mm. The PI card inputs have a differential receiver with selectable grounding.

As the measuring amplifier has ground referenced outputs, the ground connection can be left open in the actual system. But during test and integration the jumper must be in one or the other position and a grounding system checkout must be done before the jumper is removed. The sensor tip is replaced with a type that has a rolling ball.

Position Offset

This is an analog computer output to the PI controller: ROPOSOFF????. The scaling is 1 degree/Volt. If the digital signal Apply Position Offset (ROPIAPOO*) is active, ROPOSOFF???? makes it possible to offset the building with respect to the azimuth. This can be necessary in the following cases:

Controlling the building rotation with the absolute encoder. In this case the jumper J4 on the PI card must be removed in order to make the position sensors inactive in the position control servo. If this control mode is chosen because of problems with the sensors, the sensor power must be switched off to prevent PI controller interlock, which can be generated by the sensors. Note that by switching off the sensors, the analog input ROPOSERRI is always zero.
Another useful time to use this signal is during integration and test, in order to turn the building without turning the azimuth.

Filter

Before the actual PI controller amplifier, a breakout point is provided to implement a filter if necessary. This can be used in order to optimize the open loop performance of the position loop. In the actual system, this possibility is not used.

Interlock

The PI controller generates an interlock in each of the following cases:

The difference of the two sensor signals goes out of the operating range. This indicates a malfunction of the sensor system or too big an angle between building and azimuth.
The sum of the two sensor signals goes out of the operating range, which indicates a malfunction in the sensor system. THIS FUNCTION HAS BEEN TAKEN OUT DUE TO ECCENTRICITY OF THE ROTATION AXES OF BUILDING AND AZIMUTH.
The trigger limits can be set with resistors on the PI controller board. Note that this interlock stops the building motion only and therefore it is suggested to set the limits for the first case higher than the 3 degree interlock. Then, there will be no confusion and the interlock system will work properly.
A 3 degree interlock also stops the azimuth motion, while the signal ROILPII* indicates a sensor malfunction and will only interlock the building rotation. The signal ROPIRSTO* is provided to reset the interlock and must have a length of at least 100 msec.

In order to move out of a 3 degree interlock, the following procedure is foreseen:

As with all interlocks, the building and azimuth must be completely disabled. This is necessary in order to provide a safe restart.
A hardware check-out must be done to see if there is any hardware problem. Read the analog position error and check if it also shows a 3 degree value. If not, the problem might be the sensors.
Use the azimuth override switch on the front panel of the AZ power rack and assert AZILENABLEO*. This disengages the brakes. If everything works O.K., move the azimuth out of the interlock zone by hand. Move it such that the angle between building and azimuth is approx. 0 degrees (check by reading ROPOSERRI).
Negate AZILENABLEO*, restart the building and the azimuth drive systems and check that the system works O.K. again.

Building Rotation Drive Enable

The building drive system can be enabled and disabled without switching power. This feature makes enabling possible only when it is required. This enable can be done in two ways:

Hardware, by the PI controller.
Software, by asserting RODRENABO.

Both possibilities are "wire OR-ed" in the hardware. This means that one of the two is sufficient to assert RODRENABO.

Building Rotation Drive Enable By Hardware

The PI card generates the building drive enable in each of the following cases (OR function):

The angular difference between building and azimuth (position error) is "big enough". This limit is adjustable with resistors.
The building rotation speed is "big enough". This limit is also adjustable with resistors.

In practice, these two settings are not independent because of the fact that only a relatively low integral gain can be allowed. A higher integral gain will cause limit cycles. The switching level is therefore determined by the speed command.

When the drive system is enabled, the rotation system tries to decrease the position error to 0 and the system is kept enabled as long as there is a certain minimum speed.

If both position error and speed are within the limit, then the system is kept enabled during an adjustable time, which prevents too fast enable/disable switching. This delay is set to 7 seconds.

During test and integration, jumper J5 can be inserted on the PI card to enable the building continuously, i.e. independent of position error or speed.

Building Rotation Drive Enable By Software

Asserting of RODRENABO also enables the building drive. This is an OR function with the PI controller signal. This signal makes it possible to enable the building drive continuously if this is required for any reason, e.g. fast and stepwise motions.

Note, however, that the position PI controller provides only an output signal to the rotation velocity loop if at least one of the conditions, mentioned in the previous paragraph, is fulfilled. If not, the velocity reference is zero.

Velocity Reference

The velocity reference is fed to the building electronic racks via an isolation amplifier. This is done to have a complete galvanic isolation between building drive systems and VME computer.

Operating Procedure

Most of the important items concerning operating the building system have already been explained in the previous paragraphs. More is described in the next paragraph.

Switching the Rotation System On and Off

A certain sequence of commands and checks has to be done to switch on the building rotation drive system:

Check ROAUTSELI*; this signal must be active to allow computer operation.
Check ROPOSERRI; angle between azimuth and building must be in the operation area. If not, perform the interlock recovery procedure, which is described earlier (Subsection 4.6.1).
Set ROILENABO*; this applies power to the amplifier.
After a short time, say 200 msec, check ROPADISI*. If this signal is active, it means that an interlock condition is present and no operation is possible. If it is not active, the building drive is in operation.
A next check can be done by applying an analog signal via ROPOSOFF??????. Together with an enable via ROPIAPOO*, it moves the building with respect to azimuth. After the settling period, the ROPOSERRI analog input must show the corresponding offset.
Move the azimuth over an angle of say 1 degree. Check that ROPOSERRI stays small during the motion, which indicates that the building is following.

To switch the rotation system off:

Clear ROILENABO*

Maintenance Information

The description above and the electrical drawings and data sheets provide the basic information for maintenance. As a help, a list of scaling values and the adjustment procedure for the position PI controller is described below.

Scaling Values of the PI Controller

Sensor scaling: 0.2 V/mm.
IC 10 pin 6: max. 0V, min. -2V.
IC 12 pin 6: 2.67 V = 3 degrees.
IC 13 pin 6: 1 V = 1 degree (pos. error signal, also position offset scaling).
IC 22 pin 6: ca. 0.2 deg/sec per Volt (velocity reference).(depends on ASEA Tyrac S adjustment).
IC 30 pin 4, 6: Threshold = 100 mV = ca. 0.02 deg/sec (prelim. setting).
IC 30 pin 9,10: Threshold = 118 mV = 0.118 deg.

Adjustment

Interchanging of the PI controller board for a spare one means also that the position loop has to be adjusted. The procedure is as follows:

For the Azimuth, set the signal AZILENABLEO*. Verify that the AZ brakes disengage. This is done for safety: nothing will happen with the telescope if something goes wrong. Even in case of a collision the telescope is free to move.
Check carefully that the passive components of the new board have the same value. Especially R25, R52, R63, R64 and C60.
Turn P1 fully counterclockwise.
Install new PI card and check if the system is dynamically stable.
Make steps of 0.1 degree back and forth, using ROPOSOFF??????? (temporarily disconnect the computer output which is connected to this line) and ROAPO??????. Observe ROPOSERRI with a storage oscilloscope. Note that the step response looks a bit "funny" due to the backlash in the gear.
Increase the loop gain by turning P1 slowly clockwise. The optimum response is reached when the signal ROPOSERRI shows a slight overshoot.
After installation of the new board, verify the gain setting by slowly accelerating the telescope AZ axis up to maximum speed. During this acceleration, read the building signal ROPOSERRI and verify that the angle between AZ and BU stays less than 3 degrees. When the speed is constant, the signal ROPOSERRI is proportional to the speed: at 1.5 degrees per second, the difference must be less than 1 degree. (Value at installation: 0.7 degree).

Notes:

It is not useful to measure the frequency response because of the backlash in the gear.
The locked rotor resonance frequency of the building has been measured by measuring the velocity loop response: approximately 0.9 Hz. The maximum phase shift at lower frequencies is -80 degrees at 0.8 Hz. At 0.3 Hz there is a -30 degrees phase shift. So, the bandwidth of the position loop, corresponding to the optimum adjustment in the step response, is approximately 0.3 Hz.

4.7 SLIDING DOOR

The signals in Subsection 4.12.7 explain themselves; two output signals are provided: to open or close. In addition, two corresponding input signals which sense the status of the door. The last signal informs the VME computer if the door function is in automatic selection mode, i.e. can be commanded via the VME computer.

4.8 SLIT SHUTTER

Refer to Subsection 4.12.8. The implementation of the slit shutter signals is done as follows: one bit is provided to switch the 380V power. Two bits are provided which need an impulsive signal in order to start and to stop the motion. The direction is controlled by another bit. The length of the impulsive signals has to be 3 seconds.

4.9 WINDSCREEN

Refer to Subsection 4.12.9. The implementation of the windscreen signals is as follows: one bit is provided to switch the 380V power. Two bits are provided which need an impulsive signal in order to start and to stop the motion. The direction is controlled by another bit. The length of the impulsive signal has to be 100 milliseconds. Another signal is provided which senses if the chain of the windscreen is broken: WSLSCHI*. If this signal is asserted, no operation is possible.

4.9.1 Absolute Encoder

The absolute encoder is manufactured by Siemens. A similar type is also used for the windscreen and the rotation. From the control side, two possible different types can be implemented:

V 23463-K0101-D113 (1000 counts, 1 turn)
V 23463-K0201-D214 (10000 counts, 10 turn)

Together with a choice of gear reduction, a good scaling value can be chosen. The absolute encoder has BCD outputs. Digit 3 is not used for the 1000 counts type. The encoder type V23463-K0901-D315 (100.000 counts, 100 turn) can be used, but the fifth decade is not connected.

4.9.2 Line Driver/ Receiver

Because of the long distance between encoder and VME rack, a line driver/receiver link is designed. The line driver and the power supply are located close to the encoder. The receiver is mounted in the VME rack.

In order to eliminate electrical interference problems, this link has its own power supply (which also powers the line receiver) and has Opto-couplers between the receiver IC's and the VME inputs.

4.10 EMERGENCY STOPS

Refer to Subsection 4.12.2. The emergency stop buttons, installed in the rotating part of the building, are routed to the building VME rack. There is a computer signal generated for each switch, using 1 contact of the button. The other contact of each button is put in series and forms a part of the Emergency Stop push-button chain. For a complete picture of this chain, refer to Subsection 1.5.2.

4.11 MISCELLANEOUS

Refer to Subsection 4.12.11. The signal 380VPFI* indicates a power failure in the building main power distribution. It has been implemented to make it possible for the software to detect power failures. Neither the VME nor the TCS Workstation suffer from a power failure because they are connected to the un-interruptable power supply.

The software action on a power failure has to be: stop driving any building function immediately.

4.12 SIGNAL DESCRIPTIONS

The signals in the building subsystem are divided into the following groups which indicate where the signals originate (inputs to the computer), or where they have to be routed (outputs from the computer).

BS: Bottom Seal signals.
ES: Emergency Stop button signals.
FL: Flaps signals.
RO: Rotation signals.
SD: Sliding Door signals.
SS: Slit Shutter signals.
WS: Windscreen signals.
IL: Interlock signals.
xx: Miscellaneous (where "xx" is not any of the previous).

4.12.1 Bottom Seal Signals

NAME TYPE DESCRIPTION

BSINFLO* DO*1 Bottom Seal inflate command

BSDEFLO* DO*1 Bottom Seal deflate command

BSLSINFI* DI*1 Bottom Seal Limit Switch, seal inflated

BSLSDEFI* DI*1 Bottom Seal Limit Switch, seal deflated

BSAUTSELI* DI*1 Bottom Seal, automatic control selected

NAME	TYPE	DESCRIPTION
BSINFLO*	DO*1	Bottom Seal inflate command
BSDEFLO*	DO*1	Bottom Seal deflate command
BSLSINFI*	DI*1	Bottom Seal Limit Switch, seal inflated
BSLSDEFI*	DI*1	Bottom Seal Limit Switch, seal deflated
BSAUTSELI*	DI*1	Bottom Seal, automatic control selected

4.12.2 Emergency Stop Button Signals

The switches detailed below are mounted in the rotating part of the building and have no direct connection with any other VME computer; the switches are numbered as shown.

NAME TYPE DESCRIPTION

ESBUCO05I* DI*1 Building Control (tech. service. room) switch

ESCORO06I* DI*1 Control Room switch (6)

ESCORO07I* DI*1 Control Room switch (7)

ESEMRO08I* DI*1 EMMI Room (big inst. room) switch

ESWSRO09I* DI*1 Windscreen area (9) switch

ESWSRO10I* DI*1 Windscreen area (10) switch

ESIRRO11I* DI*1 IRSPEC Room (small. inst. room) switch

ESTESD12I* DI*1 Telescope Room, sliding door side switch

NAME	TYPE	DESCRIPTION
ESBUCO05I*	DI*1	Building Control (tech. service. room) switch
ESCORO06I*	DI*1	Control Room switch (6)
ESCORO07I*	DI*1	Control Room switch (7)
ESEMRO08I*	DI*1	EMMI Room (big inst. room) switch
ESWSRO09I*	DI*1	Windscreen area (9) switch
ESWSRO10I*	DI*1	Windscreen area (10) switch
ESIRRO11I*	DI*1	IRSPEC Room (small. inst. room) switch
ESTESD12I*	DI*1	Telescope Room, sliding door side switch

4.12.3 Flap Signals

The flaps have a Siemens absolute encoder with BCD outputs. The selected type will have three or four digits; the hardware can accommodate either type.

NAME TYPE DESCRIPTION

FLOPENO* DO*1 Flaps open command

FLCLOSEO* DO*1 Flaps close command

FLLSOPI* DI*1 Flaps opened limit detected

FLLSCLI* DI*1 Flaps closed limit detected

FLAUTSELI* DI*1 Flaps automatic control selected

NAME	TYPE	DESCRIPTION
FLOPENO*	DO*1	Flaps open command
FLCLOSEO*	DO*1	Flaps close command
FLLSOPI*	DI*1	Flaps opened limit detected
FLLSCLI*	DI*1	Flaps closed limit detected
FLAUTSELI*	DI*1	Flaps automatic control selected

4.12.4 Anemometer Signals

Anemometer on Top of Building

NAME TYPE DESCRIPTION

WIHMAGI AI*2 Horizontal magnitude

WIREFI AI*3 Reference value 2.5V

WIVVELI AI*4 Vertical velocity

WIDIRI AI*5 Wind direction

NAME	TYPE	DESCRIPTION
WIHMAGI	AI*2	Horizontal magnitude
WIREFI	AI*3	Reference value 2.5V
WIVVELI	AI*4	Vertical velocity
WIDIRI	AI*5	Wind direction

Anemometer on Telescope Top Ring

NAME TYPE DESCRIPTION

TWIHMAGI AI*6 Horizontal magnitude

TWIVVELI AI*9 Vertical velocity

TWIREFI AI*8 Maximal gust (Rafaga)

TWIDIRI AI*7 Wind direction

NAME	TYPE	DESCRIPTION
TWIHMAGI	AI*6	Horizontal magnitude
TWIVVELI	AI*9	Vertical velocity
TWIREFI	AI*8	Maximal gust (Rafaga)
TWIDIRI	AI*7	Wind direction

4.12.5 Analog Board Cable

CANNON "D" CONNECTOR.

SIGNAL PIN COLOUR T. STRIP NAME REMARKS

out0 36 yellow . ROPOSOFF? .

ret0 17 green . . gnd

out1 37 gray/pink . . .

ret1 16 blue/red . . gnd

in04 6 brown/gray . WIVVEL? .

ret04 14 wh./gr. . . gnd

in02 7 brn/blu . WIHMAG? .

ret02 15 wh/blu . . gnd

in03 21 gry . WIREF? .

ret03 29 pnk . . gnd

. in01 23 vio . ROPOSERRI .

ret01 31 blk . . gnd

in05 22 brn . WIDIR? .

ret05 30 wh . . gnd

in00 5 red . ROVREFI .

ret00 13 blu . . gnd

in11 2 yel . . .

ret11 10 grn . . gnd

in13 3 brn/pnk . . .

ret13 11 wh/brn . . gnd

in09 4 brn 34 TWIVVEL? .

ret09 12 wh . . gnd

in10 26 brn/red . . .

ret10 34 wh/red . . gnd

in12 25 brn/grn . . .

ret12 33 wh/grn . . gnd

in06 8 brn/yel 25 TWIHMAG? .

ret06 16 wh/yel . . gnd

in07 20 yel 28 TWIDIR? .

ret07 28 grn . . gnd

in08 24 brn 31 TWIGUST? .

ret08 32 wh . . gnd

SIGNAL	PIN	COLOUR	T. STRIP	NAME	REMARKS
out0	36	yellow	.	ROPOSOFF?	.
ret0	17	green	.	.	gnd
out1	37	gray/pink	.	.	.
ret1	16	blue/red	.	.	gnd
in04	6	brown/gray	.	WIVVEL?	.
ret04	14	wh./gr.	.	.	gnd
in02	7	brn/blu	.	WIHMAG?	.
ret02	15	wh/blu	.	.	gnd
in03	21	gry	.	WIREF?	.
ret03	29	pnk	.	.	gnd
. in01	23	vio	.	ROPOSERRI	.
ret01	31	blk	.	.	gnd
in05	22	brn	.	WIDIR?	.
ret05	30	wh	.	.	gnd
in00	5	red	.	ROVREFI	.
ret00	13	blu	.	.	gnd
in11	2	yel	.	.	.
ret11	10	grn	.	.	gnd
in13	3	brn/pnk	.	.	.
ret13	11	wh/brn	.	.	gnd
in09	4	brn	34	TWIVVEL?	.
ret09	12	wh	.	.	gnd
in10	26	brn/red	.	.	.
ret10	34	wh/red	.	.	gnd
in12	25	brn/grn	.	.	.
ret12	33	wh/grn	.	.	gnd
in06	8	brn/yel	25	TWIHMAG?	.
ret06	16	wh/yel	.	.	gnd
in07	20	yel	28	TWIDIR?	.
ret07	28	grn	.	.	gnd
in08	24	brn	31	TWIGUST?	.
ret08	32	wh	.	.	gnd

4.12.6 Rotation Signals

The rotation of the building is controlled by position sensors which sense the angle difference between building and azimuth. This is done in an analog way, so there is a position PI controller in hardware. The hardware enables the building drive signal (RODRENAB) if:

The position error is big enough or,
the speed is high enough.

The software can also drive the signal RODRENAB at any time. So, there is an OR function implemented for this signal. For more information about the rotation system, refer to Section 4.6.

NAME TYPE DESCRIPTION

ROVREFI AI*12 Velocity reference to building drive (test-point for software)

ROPOSERRI AI*12 Building position error (test-point for software)

ROPOSOFFO AO*12 Building position offset

RODRENABO* DO*1 Building drive enable

ROILENABO* DO*1 Building interlock enable; this signal switches on the power to the amplifier

ROPIAPOO* DO*1 Building PI Controller, apply position offset - i.e. feed signal ROPOSOFF to PI Controller

ROPIRSTO* DO*1 Building PI Controller reset

ROWARNO* DO*1 Building rotation warning lamps ON

ROIL3DI* DI*1 Building interlock, 3 degrees pos. or neg. limit detected

ROILPII* DI*1 Building PI Controller interlock

ROPADISI* DI*1 Building drive power amplifier disabled

ROAUTSELI* DI*1 Building drive automatic control selected

NAME	TYPE	DESCRIPTION
ROVREFI	AI*12	Velocity reference to building drive (test-point for software)
ROPOSERRI	AI*12	Building position error (test-point for software)
ROPOSOFFO	AO*12	Building position offset
RODRENABO*	DO*1	Building drive enable
ROILENABO*	DO*1	Building interlock enable; this signal switches on the power to the amplifier
ROPIAPOO*	DO*1	Building PI Controller, apply position offset - i.e. feed signal ROPOSOFF to PI Controller
ROPIRSTO*	DO*1	Building PI Controller reset
ROWARNO*	DO*1	Building rotation warning lamps ON
ROIL3DI*	DI*1	Building interlock, 3 degrees pos. or neg. limit detected
ROILPII*	DI*1	Building PI Controller interlock
ROPADISI*	DI*1	Building drive power amplifier disabled
ROAUTSELI*	DI*1	Building drive automatic control selected

4.12.7 Sliding Door Signals

Take adequate precautions to warn personnel when the door is operated under remote control.

NAME TYPE DESCRIPTION

SDOPENO* DO*1 Sliding door open command

SDCLOSEO* DO*1 Sliding door close command

SDLSOPI* DI*1 Sliding door opened limit detected

SDLSCLI DI*1 Sliding door closed limit detected

SDAUTSELI* DI*1 Sliding door automatic control selected

NAME	TYPE	DESCRIPTION
SDOPENO*	DO*1	Sliding door open command
SDCLOSEO*	DO*1	Sliding door close command
SDLSOPI*	DI*1	Sliding door opened limit detected
SDLSCLI	DI*1	Sliding door closed limit detected
SDAUTSELI*	DI*1	Sliding door automatic control selected

4.12.8 Slit Shutter Signals

NAME TYPE DESCRIPTION

SSSTRTO* DO*1 Slit Shutter start command (impulse signal)

SSSTOPO* DO*1 Slit Shutter stop command (impulse signal)

SSCLOSEO* DO*1 Slit Shutter close direction signal

SSPWONO* DO*1 Slit Shutter power on

SSLSOPI* DI*1 Slit Shutter opened limit detected

SSLSCLI* DI*1 Slit Shutter closed limit detected

SSAUTSELI* DI*1 Slit Shutter automatic control selected

NAME	TYPE	DESCRIPTION
SSSTRTO*	DO*1	Slit Shutter start command (impulse signal)
SSSTOPO*	DO*1	Slit Shutter stop command (impulse signal)
SSCLOSEO*	DO*1	Slit Shutter close direction signal
SSPWONO*	DO*1	Slit Shutter power on
SSLSOPI*	DI*1	Slit Shutter opened limit detected
SSLSCLI*	DI*1	Slit Shutter closed limit detected
SSAUTSELI*	DI*1	Slit Shutter automatic control selected

4.12.9 Windscreen Signals

The Windscreen has a Siemens absolute encoder with BCD outputs. The selected type have 4 digits.

NAME TYPE DESCRIPTION

WSSTRTO* DO*1 Windscreen start command (impulse signal)

WSSTOPO* DO*1 Windscreen stop command (impulse signal)

WSUPO* DO*1 Windscreen up direction select

WSPWONO* DO*1 Windscreen power on

WSLSUPI* DI*1 Windscreen up limit detected

WSLSDNI* DI*1 Windscreen down limit detected

WSLSCHI* DI*1 Windscreen chain broken detected

WSAUTSELI* DI*1 Windscreen automatic control selected

WSAENCI DI*8 Windscreen Absolute Encoder

NAME	TYPE	DESCRIPTION
WSSTRTO*	DO*1	Windscreen start command (impulse signal)
WSSTOPO*	DO*1	Windscreen stop command (impulse signal)
WSUPO*	DO*1	Windscreen up direction select
WSPWONO*	DO*1	Windscreen power on
WSLSUPI*	DI*1	Windscreen up limit detected
WSLSDNI*	DI*1	Windscreen down limit detected
WSLSCHI*	DI*1	Windscreen chain broken detected
WSAUTSELI*	DI*1	Windscreen automatic control selected
WSAENCI	DI*8	Windscreen Absolute Encoder

4.12.10 Interlock Signals

The interlock signals which refer to a certain building subsystem are explained in the appropriate chapter. Note that other emergency stop signals, which were installed later, are described in Subsection 4.12.2 and have the abbreviation ESxxx.

NAME TYPE DESCRIPTION

ILEMSTO1I* DI*1 Building Emergency Stop button pressed

ILEMCOMI* DI*1 Any Emergency Stop button pressed

NAME	TYPE	DESCRIPTION
ILEMSTO1I*	DI*1	Building Emergency Stop button pressed
ILEMCOMI*	DI*1	Any Emergency Stop button pressed

4.12.11 Miscellaneous Signals

NAME TYPE DESCRIPTION

380VPFI* DI*1 Building 380V phase failure

NAME	TYPE	DESCRIPTION
380VPFI*	DI*1	Building 380V phase failure

4.13 CONNECTION SCHEDULE

This signal schedule describes the location for the VME computer signals of the building. The signals are explained in Section 4.12. This section provides the information to track each signal from the software driver to the input or output of the VME board, and to the building racks.

The VME system for the building contains two Digital I/O interface boards, and one Analog I/O board.

The digital signals are connected via dedicated cable to the Weidmueller Multi-termination strips MTS1 and MT2. From here, the VME outputs to the building racks run via Optotriacs using MTS1. The VME inputs from the building racks are connected via relays, using MTS2. The work station encoder signals are connected via cable from back connector of the encoder Opto-coupler Eurocard rack. This is done without using Weidmueller Multi-termination strips. The analog inputs and outputs are connected to TS3.

4.13.1 Digital I/O ACRO0 (SLOT 9)

SIGNAL BOARD BIT BIT SIZE TERM. STRIP ACRO PIN ACT. LEVEL EXT. WORLD DESCRIPTION

SSPWONO* /acro0 0 1 MTS1-15 B32 LOW OPT#16 slit shutter power on

SSCLOSEO* /acro0 1 1 MTS1-13 B31 LOW OPT#6 slit shutter move direction

SSSTRTO* /acro0 2 1 MTS1-11 B30 LOW OPT#5 start move slit shutter

SSSTOPO* /acro0 3 1 MTS1-9 B29 LOW OPT#4 stop move slit shutter

WSPWONO* /acro0 4 1 MTS1-7 B28 LOW OPT#15 power on windscreen

WSUPO* /acro0 5 1 MTS1-5 B27 LOW OPT#3 windscreen move direction

WSSTRTO* /acro0 6 1 MTS1-3 B26 LOW OPT#2 start move windscreen

WSSTOPO* /acro0 7 1 MTS1-1 B25 LOW OPT#1 stop move windscreen

FLCLOSEO* /acro0 8 1 MTS1-31 B24 LOW OPT#10 close flaps

FLOPENO* /acro0 9 1 MTS1-29 B23 LOW OPT#9 open flaps

ROWARNO* /acro0 11 1 MTS1-25 B21 LOW OPT#17 warning lamps on (not used)

ROPIRSTO* /acro0 12 1 MTS1-23 B20 LOW TS2-1 PI reset PI controller reset (not used)

ROPIAPOO* /acro0 13 1 MTS1-21 B19 LOW TS2-3 to PI apply position offset (not used)

ROILENABO* /acro0 14 1 MTS1-19 B18 LOW OC1-A2 power on building rotation

RODRENABO* /acro0 15 1 MTS1-17 B17 LOW TS5-7 to PI building drive enable

BSDEFLO* /acro0 18 1 MTS1-43 A30 LOW OPT#14 deflate bottom seal

BSINFLO* /acro0 19 1 MTS1-41 A29 LOW OPT#13 inflate bottom seal

SDOPENO* /acro0 22 1 MTS1-35 A26 LOW OPT#12 close sliding door

SDCLOSEO* /acro0 23 1 MTS1-33 A25 LOW OPT#11 open sliding door

ESTESD12I* /acro0 24 1 MTS1-63 A24 LOW Relay24 emergency button telescope room

ESIRRO11I* /acro0 26 1 MTS1-61 A22 LOW Relay25 emergency button IR room

ESWSRO10I* /acro0 28 1 MTS1-59 A20 LOW Relay26 emergency button windscreen area

SIGNAL	BOARD	BIT	BIT SIZE	TERM. STRIP	ACRO PIN	ACT. LEVEL	EXT. WORLD	DESCRIPTION
SSPWONO*	/acro0	0	1	MTS1-15	B32	LOW	OPT#16	slit shutter power on
SSCLOSEO*	/acro0	1	1	MTS1-13	B31	LOW	OPT#6	slit shutter move direction
SSSTRTO*	/acro0	2	1	MTS1-11	B30	LOW	OPT#5	start move slit shutter
SSSTOPO*	/acro0	3	1	MTS1-9	B29	LOW	OPT#4	stop move slit shutter
WSPWONO*	/acro0	4	1	MTS1-7	B28	LOW	OPT#15	power on windscreen
WSUPO*	/acro0	5	1	MTS1-5	B27	LOW	OPT#3	windscreen move direction
WSSTRTO*	/acro0	6	1	MTS1-3	B26	LOW	OPT#2	start move windscreen
WSSTOPO*	/acro0	7	1	MTS1-1	B25	LOW	OPT#1	stop move windscreen
FLCLOSEO*	/acro0	8	1	MTS1-31	B24	LOW	OPT#10	close flaps
FLOPENO*	/acro0	9	1	MTS1-29	B23	LOW	OPT#9	open flaps
ROWARNO*	/acro0	11	1	MTS1-25	B21	LOW	OPT#17	warning lamps on (not used)
ROPIRSTO*	/acro0	12	1	MTS1-23	B20	LOW	TS2-1 PI reset	PI controller reset (not used)
ROPIAPOO*	/acro0	13	1	MTS1-21	B19	LOW	TS2-3 to PI	apply position offset (not used)
ROILENABO*	/acro0	14	1	MTS1-19	B18	LOW	OC1-A2	power on building rotation
RODRENABO*	/acro0	15	1	MTS1-17	B17	LOW	TS5-7 to PI	building drive enable
BSDEFLO*	/acro0	18	1	MTS1-43	A30	LOW	OPT#14	deflate bottom seal
BSINFLO*	/acro0	19	1	MTS1-41	A29	LOW	OPT#13	inflate bottom seal
SDOPENO*	/acro0	22	1	MTS1-35	A26	LOW	OPT#12	close sliding door
SDCLOSEO*	/acro0	23	1	MTS1-33	A25	LOW	OPT#11	open sliding door
ESTESD12I*	/acro0	24	1	MTS1-63	A24	LOW	Relay24	emergency button telescope room
ESIRRO11I*	/acro0	26	1	MTS1-61	A22	LOW	Relay25	emergency button IR room
ESWSRO10I*	/acro0	28	1	MTS1-59	A20	LOW	Relay26	emergency button windscreen area

SIGNAL BOARD BIT BIT SIZE TERM. STRIP ACRO PIN ACT. LEVEL EXT. WORLD DESCRIPTION

SSAUTSELI* /acro0 33 1 MTS2-14 C31 LOW Relay7 slit shutter automatic control selected

SSLSCLI* /acro0 34 1 MTS2-12 C30 LOW Relay6 slit shutter close limit switch

SSLSOPI* /acro0 35 1 MTS2-10 C29 LOW Relay5 slit shutter open limit switch

WSAUTSELI* /acro0 36 1 MTS2-8 C28 LOW Relay4 windscreen automatic control selected

SWLSCHI* /acro0 37 1 MTS2-6 C27 LOW Relay3 windscreen chain broken limit switch

WSLSDNI* /acro0 38 1 MTS2-4 C26 LOW Relay2 windscreen down limit switch

WSLSUPI* /acro0 39 1 MTS2-2 C25 LOW Relay1 windscreen up limit switch

FLAUTSELI* /acro0 40 1 MTS2-32 C24 LOW Relay13 flaps automatic control selected

FLLSCLI* /acro0 41 1 MTS2-30 C23 LOW Relay12 flaps close limit switch

FLLSOPI* /acro0 42 1 MTS2-28 C22 LOW Relay11 flaps open limit switch

ROILPI* /acro0 44 1 MTS2-24 C20 LOW . building PI controller interlock

ROAUSELI* /acro0 45 1 MTS2-22 C19 LOW Relay10 building automatic control selected

ROPADISI* /acro0 46 1 MTS2-20 C18 LOW . building power amplifier disabled

ROIL3DI* /acro0 47 1 MTS2-18 C17 LOW Relay8 three degree interlock detected

BSAUTSELI* /acro0 49 1 MTS2-46 A2 LOW Relay19 bottom seal automatic control selected

BSLSDEFI* /acro0 50 1 MTS2-44 A3 LOW Relay18 bottom seal deflated limit switch

BSLSINFI* /acro0 51 1 MTS2-42 A4 LOW Relay17 bottom seal inflated limit switch

SDAUTSELI* /acro0 53 1 MTS2-38 A6 LOW Relay16 sliding door automatic control selected

SDLSCLI* /acro0 54 1 MTS2-36 A7 LOW Relay15 sliding door close limit switch

SCLSOPI* /acro0 55 1 MTS2-34 A8 LOW Relay14 sliding door open limit switch

ESEMRO08I* /acro0 56 1 MTS1-55 A9 LOW Relay28 emergency button EMMI room

ESCORO07I* /acro0 57 1 MTS1-53 A10 LOW Relay29 emergency button control room

ESWSRO09I* /acro0 58 1 MTS2-56 A11 LOW Relay27 emergency button windscreen area

380VPFI* /acro0 59 1 MTS2-54 A12 LOW Relay23 building 380V phase failure

ESCORO06I* /acro0 60 1 MTS1-51 A13 LOW Relay30 emergency button control room

ESBUCO05I* /acro0 61 1 MTS1-49 A14 LOW Relay31 emergency button building control room

ILEMCOMI* /acro0 62 1 MTS2-52 A15 LOW . any emergency button

ILEMSTO01I* /acro0 63 1 MTS2-50 A16 LOW . building emergency stop button

SIGNAL	BOARD	BIT	BIT SIZE	TERM. STRIP	ACRO PIN	ACT. LEVEL	EXT. WORLD	DESCRIPTION
SSAUTSELI*	/acro0	33	1	MTS2-14	C31	LOW	Relay7	slit shutter automatic control selected
SSLSCLI*	/acro0	34	1	MTS2-12	C30	LOW	Relay6	slit shutter close limit switch
SSLSOPI*	/acro0	35	1	MTS2-10	C29	LOW	Relay5	slit shutter open limit switch
WSAUTSELI*	/acro0	36	1	MTS2-8	C28	LOW	Relay4	windscreen automatic control selected
SWLSCHI*	/acro0	37	1	MTS2-6	C27	LOW	Relay3	windscreen chain broken limit switch
WSLSDNI*	/acro0	38	1	MTS2-4	C26	LOW	Relay2	windscreen down limit switch
WSLSUPI*	/acro0	39	1	MTS2-2	C25	LOW	Relay1	windscreen up limit switch
FLAUTSELI*	/acro0	40	1	MTS2-32	C24	LOW	Relay13	flaps automatic control selected
FLLSCLI*	/acro0	41	1	MTS2-30	C23	LOW	Relay12	flaps close limit switch
FLLSOPI*	/acro0	42	1	MTS2-28	C22	LOW	Relay11	flaps open limit switch
ROILPI*	/acro0	44	1	MTS2-24	C20	LOW	.	building PI controller interlock
ROAUSELI*	/acro0	45	1	MTS2-22	C19	LOW	Relay10	building automatic control selected
ROPADISI*	/acro0	46	1	MTS2-20	C18	LOW	.	building power amplifier disabled
ROIL3DI*	/acro0	47	1	MTS2-18	C17	LOW	Relay8	three degree interlock detected
BSAUTSELI*	/acro0	49	1	MTS2-46	A2	LOW	Relay19	bottom seal automatic control selected
BSLSDEFI*	/acro0	50	1	MTS2-44	A3	LOW	Relay18	bottom seal deflated limit switch
BSLSINFI*	/acro0	51	1	MTS2-42	A4	LOW	Relay17	bottom seal inflated limit switch
SDAUTSELI*	/acro0	53	1	MTS2-38	A6	LOW	Relay16	sliding door automatic control selected
SDLSCLI*	/acro0	54	1	MTS2-36	A7	LOW	Relay15	sliding door close limit switch
SCLSOPI*	/acro0	55	1	MTS2-34	A8	LOW	Relay14	sliding door open limit switch
ESEMRO08I*	/acro0	56	1	MTS1-55	A9	LOW	Relay28	emergency button EMMI room
ESCORO07I*	/acro0	57	1	MTS1-53	A10	LOW	Relay29	emergency button control room
ESWSRO09I*	/acro0	58	1	MTS2-56	A11	LOW	Relay27	emergency button windscreen area
380VPFI*	/acro0	59	1	MTS2-54	A12	LOW	Relay23	building 380V phase failure
ESCORO06I*	/acro0	60	1	MTS1-51	A13	LOW	Relay30	emergency button control room
ESBUCO05I*	/acro0	61	1	MTS1-49	A14	LOW	Relay31	emergency button building control room
ILEMCOMI*	/acro0	62	1	MTS2-52	A15	LOW	.	any emergency button
ILEMSTO01I*	/acro0	63	1	MTS2-50	A16	LOW	.	building emergency stop button

SIGNAL BOARD BIT BIT SIZE TERMINAL STRIP ACRO PIN ACTIVE LEVEL DESCRIPTION

WSAENCI /acro0 0 1 encoder B32 HIGH windscreen absolute encoder

WSAENCI /acro0 1 1 encoder B31 HIGH windscreen absolute encoder

WSAENCI /acro0 2 1 encoder B30 HIGH windscreen absolute encoder

WSAENCI /acro0 3 1 encoder B29 HIGH windscreen absolute encoder

WSAENCI /acro0 4 1 encoder B28 HIGH windscreen absolute encoder

WSAENCI /acro0 5 1 encoder B27 HIGH windscreen absolute encoder

WSAENCI /acro0 6 1 encoder B26 HIGH windscreen absolute encoder

WSAENCI /acro0 7 1 encoder B25 HIGH windscreen absolute encoder

WSAENCI /acro0 8 1 encoder B24 HIGH windscreen absolute encoder

WSAENCI /acro0 9 1 encoder B23 HIGH windscreen absolute encoder

WSAENCI /acro0 10 1 encoder B22 HIGH windscreen absolute encoder

WSAENCI /acro0 11 1 encoder B21 HIGH windscreen absolute encoder

WSAENCI /acro0 12 1 encoder B20 HIGH windscreen absolute encoder

WSAENCI /acro0 13 1 encoder B19 HIGH windscreen absolute encoder

WSAENCI /acro0 14 1 encoder B18 HIGH windscreen absolute encoder

WSAENCI /acro0 15 1 encoder B17 HIGH windscreen absolute encoder

SIGNAL	BOARD	BIT	BIT SIZE	TERMINAL STRIP	ACRO PIN	ACTIVE LEVEL	DESCRIPTION
WSAENCI	/acro0	0	1	encoder	B32	HIGH	windscreen absolute encoder
WSAENCI	/acro0	1	1	encoder	B31	HIGH	windscreen absolute encoder
WSAENCI	/acro0	2	1	encoder	B30	HIGH	windscreen absolute encoder
WSAENCI	/acro0	3	1	encoder	B29	HIGH	windscreen absolute encoder
WSAENCI	/acro0	4	1	encoder	B28	HIGH	windscreen absolute encoder
WSAENCI	/acro0	5	1	encoder	B27	HIGH	windscreen absolute encoder
WSAENCI	/acro0	6	1	encoder	B26	HIGH	windscreen absolute encoder
WSAENCI	/acro0	7	1	encoder	B25	HIGH	windscreen absolute encoder
WSAENCI	/acro0	8	1	encoder	B24	HIGH	windscreen absolute encoder
WSAENCI	/acro0	9	1	encoder	B23	HIGH	windscreen absolute encoder
WSAENCI	/acro0	10	1	encoder	B22	HIGH	windscreen absolute encoder
WSAENCI	/acro0	11	1	encoder	B21	HIGH	windscreen absolute encoder
WSAENCI	/acro0	12	1	encoder	B20	HIGH	windscreen absolute encoder
WSAENCI	/acro0	13	1	encoder	B19	HIGH	windscreen absolute encoder
WSAENCI	/acro0	14	1	encoder	B18	HIGH	windscreen absolute encoder
WSAENCI	/acro0	15	1	encoder	B17	HIGH	windscreen absolute encoder

4.13.2 Analogue I/O

SIGNAL BOARD CHANNEL TERMINAL STRIP AIO PIN DESCRIPTION

ROPOSOFFO /aio0 OUT-0 TS3-1,2,3 A31-C31 building position offset (not used)

ROVREFI /aio0 IN-0 TS3-7,8,9 A1-C1 velocity reference

ROPOSERRI /aio0 IN-1 TS3-10,11,12 A3-C3 building position error

SIGNAL	BOARD	CHANNEL	TERMINAL STRIP	AIO PIN	DESCRIPTION
ROPOSOFFO	/aio0	OUT-0	TS3-1,2,3	A31-C31	building position offset (not used)
ROVREFI	/aio0	IN-0	TS3-7,8,9	A1-C1	velocity reference
ROPOSERRI	/aio0	IN-1	TS3-10,11,12	A3-C3	building position error

4.13.3 RS232

SIGNAL I/O LOCATION

ACRS232 RS232 Connected to RS232 interface of VME CPU

SIGNAL	I/O	LOCATION
ACRS232	RS232	Connected to RS232 interface of VME CPU

4.13.4 I/O Boards Jumper Settings

VME BOARD JUMPER SETTING STATE FUNCTION

ACRO 9481 J1, J3, J5, J7 Installed Enables internal pull-up to +5V of the I/O lines

J2, J4, J6, J8 Installed Enable internal threshold reference of the input

J17 Base address: Base address:

board 1; 5-6 installed ffff1000 hex (/acro0)

board 2; 1-2 and 5-6 installed ffff1400 hex (/acro1)

J19 Installed Short supervisory and non-privileged access

J20 Omitted SYSFAIL is not asserted after reset

VMIC, VMIVME-3111, analog I/O Default setting is: analog inputs; 16 differential, -10 to +10V

analog outputs; single-ended, -10 to +10V

J1 Installed Ground P3 return

J2 Installed Ground P3 sense

J3 Omitted 5V full scale input

J4 1-1 installed Bipolar analog inputs

J5 2-3 installed Auto input gain adjust

J6 Omitted Unipolar analog inputs not enabled

J7, J8 Omitted Output test is validated

J9, J10, J11 Omitted P3 inputs enabled

J12 1-2 installed Bipolar analog outputs

J13 Omitted 20V full scale output range

J15 1-2 installed 20V full scale input range

J17 to J24 Omitted Differential input

J27 to J34 Omitted Differential input

J25 Omitted 2.5Vdc reference unused

J26 Installed 10Vdc reference used

J35 Installed Ground P2 sense

J36, J37 Base address: Base address:

board 1; J36: 0, 1, 2, 3, 6 and 7 installed ffff30000 hex (/aio0)

J37: 0, 1 and 2 installed

J37-3 Omitted short non-privileged access

J38 2-3 installed Auto input zero adjust

J39 Installed Ground analog outputs return

J40 Omitted 5Vdc reference unused

J41 Omitted Ext. trig not connected to P2 ground sense

J42 1-2 installed Ext. trig rt. connected to P2 ground sense

VME BOARD	JUMPER SETTING	STATE	FUNCTION
ACRO 9481	J1, J3, J5, J7	Installed	Enables internal pull-up to +5V of the I/O lines
	J2, J4, J6, J8	Installed	Enable internal threshold reference of the input
	J17	Base address:	Base address:
		board 1; 5-6 installed	ffff1000 hex (/acro0)
		board 2; 1-2 and 5-6 installed	ffff1400 hex (/acro1)
	J19	Installed	Short supervisory and non-privileged access
	J20	Omitted	SYSFAIL is not asserted after reset


VMIC, VMIVME-3111, analog I/O	Default setting is: analog inputs; 16 differential, -10 to +10V
	analog outputs; single-ended, -10 to +10V
	J1	Installed	Ground P3 return
	J2	Installed	Ground P3 sense
	J3	Omitted	5V full scale input
	J4	1-1 installed	Bipolar analog inputs
	J5	2-3 installed	Auto input gain adjust
	J6	Omitted	Unipolar analog inputs not enabled
	J7, J8	Omitted	Output test is validated
	J9, J10, J11	Omitted	P3 inputs enabled
	J12	1-2 installed	Bipolar analog outputs
	J13	Omitted	20V full scale output range
	J15	1-2 installed	20V full scale input range
	J17 to J24	Omitted	Differential input
	J27 to J34	Omitted	Differential input
	J25	Omitted	2.5Vdc reference unused
	J26	Installed	10Vdc reference used
	J35	Installed	Ground P2 sense
	J36, J37	Base address:	Base address:
		board 1; J36: 0, 1, 2, 3, 6 and 7 installed	ffff30000 hex (/aio0)
		J37: 0, 1 and 2 installed
	J37-3	Omitted	short non-privileged access
	J38	2-3 installed	Auto input zero adjust
	J39	Installed	Ground analog outputs return
	J40	Omitted	5Vdc reference unused
	J41	Omitted	Ext. trig not connected to P2 ground sense
	J42	1-2 installed	Ext. trig rt. connected to P2 ground sense

4.14 MAINTENANCE INFORMATION

This section lists maintenance information for the NTT building VME rack; also included is a List of Drawings and Data Sheets.

4.14.1 Interlock Chain

A special sheet is added in the drawings which shows the schematic diagram of the interlock chain in relation to the azimuth interlock and the emergency stop chain.

4.14.2 Connections to Building Power Racks

The interfacing to the building power racks has been designed to ensure complete galvanic isolation between VME rack and power racks. This is done to avoid interference from the thyristor power amplifiers.

Care must be taken during maintenance to avoid any galvanic connection between the two systems via cable shields etc. Treat the velocity reference to the building rotation power amplifier with special care when taking measurements etc.

A special cable duct in the VME rack has been mounted in order to guide the cables to the building power racks with a minimum of interference to the VME computer.

4.14.3 Drawing List

TITLE/ SUB-TITLE SHT NUMBER LAST UPDATE DRAWING NUMBER

Building Position PI Controller . . CS-P-1495

- Schematic Diagram (Sht 1) 1 26-06-88 .

- Schematic Diagram (Sht 2) 2 30-06-88 .

- PCB Layout . . CS-P-1495A

Isolation Amplifier . . CS-P-1494

- Schematic Diagram . 25-07-88 .

- PCB Layout . . CS-P-1494A

Building Control VME Rack Schematic Diagram . . CS-E-1525

- Interlock Chain 1 27-04-89 .

- Digital I/O 2 18-05-88 .

Building Control VME Rack Wiring Diagram . . CS-E-1526

- Relay Inputs Part 1 3 14-03-90 .

- Relay Inputs Part 2 4 14-03-90 .

- Position PI Card Controller 5 14-03-90 .

- VME Analog I/O Cable 6 14-03-90 .

- Interlock Chain 7 14-03-90 .

- Miscellaneous Signals 8 14-03-90 .

- Layout of Rack Front 9 14-03-90 .

- Layout of Rack rear 10 14-03-90 .

- Emergency Stop Switches 11 07-05-90 .

Building Control VME Rack, Encoder . . CS-E-1540

- Schematic Diagram 1 14-03-90 .

- Cabling Diagram 2 02-04-89 .

- Line Driver, Schematic Diagram 3 07-07-88 .

- Line Receiver, Schematic Diagram 4 13-03-90 .

- Line Driver, PCB Layout . . CS-P-1516A

- Line Receiver, PCB Layout . . CS-P-1517A

Slit Shutter Speed Guard Circuit (Sht 1) 1 . .

Slit Shutter Speed Guard Circuit (Sht 2) 2 . .

Slit Shutter Speed Guard Board . . .

TITLE/ SUB-TITLE	SHT NUMBER	LAST UPDATE	DRAWING NUMBER
Building Position PI Controller	.	.	CS-P-1495
- Schematic Diagram (Sht 1)	1	26-06-88	.
- Schematic Diagram (Sht 2)	2	30-06-88	.
- PCB Layout	.	.	CS-P-1495A
Isolation Amplifier	.	.	CS-P-1494
- Schematic Diagram	.	25-07-88	.
- PCB Layout	.	.	CS-P-1494A
Building Control VME Rack Schematic Diagram	.	.	CS-E-1525
- Interlock Chain	1	27-04-89	.
- Digital I/O	2	18-05-88	.
Building Control VME Rack Wiring Diagram	.	.	CS-E-1526
- Relay Inputs Part 1	3	14-03-90	.
- Relay Inputs Part 2	4	14-03-90	.
- Position PI Card Controller	5	14-03-90	.
- VME Analog I/O Cable	6	14-03-90	.
- Interlock Chain	7	14-03-90	.
- Miscellaneous Signals	8	14-03-90	.
- Layout of Rack Front	9	14-03-90	.
- Layout of Rack rear	10	14-03-90	.
- Emergency Stop Switches	11	07-05-90	.
Building Control VME Rack, Encoder	.	.	CS-E-1540
- Schematic Diagram	1	14-03-90	.
- Cabling Diagram	2	02-04-89	.
- Line Driver, Schematic Diagram	3	07-07-88	.
- Line Receiver, Schematic Diagram	4	13-03-90	.
- Line Driver, PCB Layout	.	.	CS-P-1516A
- Line Receiver, PCB Layout	.	.	CS-P-1517A
Slit Shutter Speed Guard Circuit (Sht 1)	1	.	.
Slit Shutter Speed Guard Circuit (Sht 2)	2	.	.
Slit Shutter Speed Guard Board	.	.	.

4.14.4 Data Sheets

DESCRIPTION NO. OF SHEETS

Burr-Brown Opto-transceiver LDM80 2

Siemens Absolute Encoders 6

Burr-Brown Isolation Amplifier 3650 8

Burr-Brown DC/ DC Converter PWR 317 2

Hottinger Baldwin Position Sensor W50TS 11

Hottinger Baldwin Measuring Amplifier MGT 233.0 11

DESCRIPTION	NO. OF SHEETS
Burr-Brown Opto-transceiver LDM80	2
Siemens Absolute Encoders	6
Burr-Brown Isolation Amplifier 3650	8
Burr-Brown DC/ DC Converter PWR 317	2
Hottinger Baldwin Position Sensor W50TS	11
Hottinger Baldwin Measuring Amplifier MGT 233.0	11