Chapter 3 - Altitude/ Azimuth Drives

3.3 CONNECTION SCHEDULE

3.3.1 Introduction

This section describes the connections between the VME computer and the Weidmueller termination strips.

The AL/ AZ computer contains 3 digital I/O boards and 1 analog I/O board.

Digital I/O Signals

The digital I/O signals are wired to the termination strips as follows:


SIGNAL	DIGITAL I/O BOARD (No./ Connector)	TERMINATION
Limit switch	1/ Pa	MTS5
Local signals	1/ Pc	IE Card
Interlock, PI Controller	3/ Pa	MTS3
Temperature warnings	3/ Pc	MTS4

3.3.2 Altitude absolute encoder signals to Digital I/O ACRO-0


SIGNAL	BIT	I/O	MTS1	PIN# on board	CANNON-9 PIN# on SAE box
AEDATI	0	I	15	B 32	Pin 1 (bit 2⁰)
AEDATI	1	I	13	B 31	Pin 2 (bit 2¹)
AEDATI	2	I	11	B 30	Pin 3 (bit 2²)
AEDATI	3	I	9	B 29	Pin 4 (bit 2³)
AEDATI	4	I	7	B 28	Pin 5 (bit 2⁴)
AEDATI	5	I	5	B 27	Pin 6 (bit 2⁵)
AEDATI	6	I	3	B 26	Pin 7 (bit 2⁶)
AEPARI	7	I	1	B 25	Pin 8 (bit 2⁷) - Parity bit

3.3.3 Altitude limit switch signals to Digital I/O ACRO-0

SIGNAL	BIT	I/O	MTS1	PIN# on board	COMMENTS
VSPOSLIMI*	8	I	31	B 24	Altitude 95.3 deg proximity limit switch (Upper Limit=1)
VSNEGLIM*	9	I	29	B 23	Altitude 10 deg proximity limit switch (Lower Limit=1)
WATCH DOG	10	O	27	B 22	Rising edge retriggerable timer (3.3 sec.pulse)

3.3.4 Altitude signals via Digital I/O ACRO-1


ALTITUDE SIGNAL	BIT	I/O	MTS3	5V RELAY	TS7?	Telescope Active (YES/NO)	Active(YES/NO)	Comments
ALPAFAULT1	0	I	15	.	46	0V / 0V	1 / 0	CLEAR=1
ALPAFAULT2	1	I	13	.	48	0V / 0V	1 / 0	CLEAR=1
ALPAFAULT3	2	I	11	.	49	0V / 0V	1 / 0	CLEAR=1
ALPAFAULT4	3	I	9	.	50	0V / 0V	1 / 0	CLEAR=1
ALILEMCOM	6	I	3	.	53	0V / 0V	1 / 0	CLEAR=1
ALILMOTOR	7	I	1	.	54	0V / 0V	1 / 0	CLEAR=1
ALILLOC	8	I	31	.	3	0V / 0V	1 / 0	Interlock
ALILBRMAN	9	I	29	.	5	0V / 0V	1 / 0	Interlock
ALIL380PF	10	I	27	.	1	0V / 3.5V	1 / 0	.
ALILPI	11	I	25	.	44	0V / 0V	1 / 0	.
ALILPADIS	12	I	23	.	18	0V / 3.5V	1 / 0	.
ALILNEGLIM*	13	I	21	.	16	3.5V / 3.5V	1 / 0	Interlock
ALILPOSLIM*	14	I	19	.	12	3.5V / 3.5V	1 / 0	Interlock
ALILEMSTO	15	I	17	.	9	0.18V / 0.1V	.	CLEAR=1,RL11 in power rack
ALPIRESET*	16	O	47	.	70	4.8V / 4.8V	.	if SET RL7 is on
ALPIAPT*	17	O	45	.	68	0.3V / 4.8V	.	if SET RL6 is on
ALPICVL*	18	O	43	.	66	0.3V / 4.8V	.	if SET RL5 is on
ALPIATR*	19	O	41	.	64	4.8V / 4.8V	.	if SET RL4 is on
ALPIVRS8*	20	O	39	.	62	0.3V / 0.3V	.	if SET RL3 is on
ALILENABLE*	21	O	37	.	7	0.3V / 4.8V	.	if SET RL1 is on
ALILORIDE*	22	O	35	.	14	4.8V / 4.8V	.	if SET RL2 is on

3.3.5 Motor Signals


SIGNAL	PORT	I/O	ACRO-1, Slot 7 Pc	MTS4	OPTO-COUPLER	TS4
ALMTBEAR3	PB17	I	2	2	.	34
ALMTWIND3	PB16	I	4	4	.	32
ALMTBRAK2	PB15	I	6	6	.	30
ALMTBEAR2	PB14	I	8	8	.	28
ALMTWIND2	PB13	I	10	10	.	26
ALMTBRAK1	PB12	I	12	12	.	24
ALMTBEAR1	PB11	I	14	14	.	22
ALMTWIND1	PB10	I	16	16	.	20
ALMTBRAK4	PB23	I	26	26	.	42
ALMTBEAR4	PB22	I	28	28	.	40
ALMTWIND4	PB21	I	30	30	.	38
ALMTBRAK3	PB20	I	32	32	.	36

Note: MTS4 gnd connections on all odd pin numbers

3.3.6 Azimuth signals via Digital I/O ACRO-1


AZIMUTH SIGNAL	BIT	I/O	ACRO-1, Slot 7 Pa	MTS3	5V RELAY	TS7?	Telescope Active (YES/NO)	Active(YES/NO)	Comments
AZILMOTOR	7	I	1	1	.	54	0 / 0	1 / 0	CLEAR=1
AZILEMCOM	6	I	3	3	.	53	0 / 0	1 / 0	CLEAR=1
AZIL3D	5	I	5	5	.	52	0 / 0	1 / 0	AZ only
AZILHB	4	I	7	7	.	51	0 / 0	1 / 0	AZ only
AZPAFAULT4	3	I	9	9	.	50	0 / 0	1 / 0	CLEAR=1
AZPAFAULT3	2	I	11	11	.	49	0 / 0	1 / 0	CLEAR=1
AZPAFAULT2	1	I	13	13	.	48	0 / 0	1 / 0	CLEAR=1
AZPAFAULT1	0	I	15	15	.	46	0 / 0	1 / 0	CLEAR=1
AZILEMSTO	15	I	17	17	.	9	0 / 0.1	1 / 0	CLEAR=1
AZILPADIS	12	I	23	23	.	18	0 / 3.5	.	.
AZILPI	11	I	25	25	.	44	0 / 0	1 / 0	CLEAR=1
AZIL380PF	10	I	27	27	.	1	0 / 3.5	.	.
AZILORIDE*	22	O	35	35	.	14	4.9 / 4.9	.	if SET RL2 is on
AZILENABLE*	21	O	37	37	.	7	0.4 / 4.9	.	if SET RL1 is on
AZPIVRS8*	20	O	39	39	.	62	0.4 / 0.3	.	if SET RL3 is on
AZPIATR*	19	O	41	41	.	64	4.9 / 4.9	.	if SET RL4 is on
AZPICVL*	18	O	43	43	.	66	0.3 / 4.9	.	if SET RL5 is on
AZPIAPT*	17	O	45	45	.	68	0.3 / 4.9	.	if SET RL6 is on
AZPIRESET*	16	O	47	47	.	70	4.9 / 4.9	.	if SET RL7 is on

Note 1: When telescope is stopped, sequentially RL5, RL6, RL1 are switched ON

When telescope is started, sequentially RL3 goes OFF then RL1, RL6, RL5 and RL3 are switched ON

Note 2: MTS3 GND connections on all even pin numbers

3.3.7 Analog I/O Signals


SIGNAL NAME	ANALOG BOARD (P2-pin)	TS11	TS11-GND	VOLTAGES (up - down - stand by)
PIVREF	OUT0 (a31)	34	35	+9.5/ -9.5/ 0.0
PITORQUE	OUT1 (a32)	31	32	not used
PIVERR	IN06 (a13)	19	20	not used
PICREF	IN02 (a5)	25	26	. / . / 1.5
PIACTV	IN04 (a9)	22	23	-10/ +10 / 0.0
PACUR1	IN00 (a1)	28	29	-0.3/-0.8/-0.58
PACUR2	IN09 (a19)	16	17	-0.3/-0.8/-0.58
PACUR3	IN13 (a27)	10	11	+0.9/+0.4/+0.69
PACUR4	IN11 (a23)	13	14	+0.9/+0.4/+0.68

All unused inputs are connected to ground

3.4 CABLING

Subsections 3.4.4 to 3.4.10 describe the external cabling of the Power Rack.

Subsection 3.4.11 describes the external cabling of the Control Rack.

For other external cabling from the Control Rack to the Synchronisation Clock, Incremental Encoder and Absolute Encoder, refer to the AL-AZ Interconnections diagram.

3.4.1 Numbering System

All cables and connectors have the following numbers:

NTT.16/10-00-zzz- for Azimuth.

NTT.16/20-00-zzz- for Altitude.

The reference no. will be noted: NTT.16/x0-00-zzz-

3.4.2 Explanation of Terms

MTS-nn- : Multi-termination Strip (Type RS-F or RF-SD Weidmueller), nn=MTS number.
TS-nn- : Terminal Strip (Type KB 2,5 D Weidmueller), nn = TS number.
--> : Pin, male.
--< : Pin, female.
EARTH : Protective earth, 6mm2 cable connected on Earth Rail at rack side.
COM : Local ground for shield connection.
ALT. P.A. : Amplifiers.
P.I. CTRL : PI Controller Card.
Tmnl (1 or 2) : Terminal no. of either Motor, Tacho or Brake.

3.4.3 Cable Types

Helukabel Li-Y-(C)-Y 2*0, 75mm2 (twisted pair plus shield).
Belden No. 8451 2*AWG22 (twisted pair plus shield plus drain).
Filotex ET 63253 9*2*AWG28 (9 individual shielded pairs plus 1 common drain).

The cable shield continuation through the connector is effected either by the housing or by a specific pin.

For the motor winding, the connector housing is isolated from the chassis.

3.4.4 Azimuth Motor Connections

Cables and connectors are numbered NTT.16/10-00-zzz- where zzz are the component numbers as follows:

000, 004, 008, 012: Helukabel CY 4*2,5mm2 Shielded.
003, 007, 011, 015: Spezialkabel HO7V-K 6mm2.
001, 005, 009, 013: LEMO Connector F.4.E.304.NAG11,6.
002, 006, 010, 014: LEMO connector RA.4.E.304N RA4.251 (ring for shield).

Azimuth Motor Connection Diagram

3.4.5 Azimuth Tacho Connections

Cables and connectors are numbered NTT.16/10-00-zzz- where zzz are the component numbers as follows:

016, 019, 022, 025: Belden No. 8451 2*AWG22 (twisted pair plus shield plus drain).
017, 020, 023, 026: LEMO F.0.E.303.NAG3,7.
018, 021, 024, 027: LEMO RA.S.C.0E.303.NAG3,7.

Azimuth Tacho Connection Diagram

3.4.6 Altitude Motor Connections

Cables and connectors are numbered NTT.16/20-00-zzz- where zzz are the component numbers as follows:

000, 004, 008, 012: Helukabel CY 4*2,5mm2 Shielded.
003, 007, 011, 015: Spezialkabel HO7V-K 6mm2.
001, 005, 009, 013: LEMO connector F.4.E.304.NAG11,6.
002, 006, 010, 014: LEMO connector RA.4.E.304.N RA4.251 (ring for shield).

Altitude Motor Connection Diagram

3.4.7 Altitude Tacho Connections

Cables and connectors are numbered NTT.16/20-00-zzz- where zzz are the component numbers as follows:

016, 019, 022, 025: Belden No. 8451 2*AWG22 (twisted pair plus shield plus drain).
017, 020, 023, 026: LEMO F.0.E.303.NAG3,7.
018, 021, 024, 027: LEMO RA.S.C.0E.303.NAG3,7.

Altitude Tacho Connection Diagram

3.4.8 Brake Connections - Altitude and Azimuth

Cables and connectors are numbered NTT.16/x0-00-zzz- where zzz are the component numbers as follows:

028, 031, 034, 037: Helukabel Li-Y-(C)-Y 2*0,75mm2 (twisted pair plus shield).
029, 032, 035, 038: LEMO F.2.E.304.NAG6,4.
030, 033, 036, 039: LEMO RA.2.E.304.N.

Brake Connections Connection Diagram

Explanation of terms:

TS-05: Terminal Strip on the Patch Panel (access from rear side of Power Rack). The shielding is grounded at P.A. Terminal Strip. The interconnections to the Brake Power Amplifier are detailed on the AL-AZ Interconnections diagram

3.4.9 Thermal Switches and Brake Contact

Three thermal switches per motor give an alarm to the computer over 70 degrees. They are named as the signals sent to the computer listed in Subsection 3.2.3 (eg. MTWIND1 for motor 1 winding over-temperatute).

The switches are type: Uchiya-UP-6 70 Deg.

Three thermal switches per motor are part of the interlock chain, and are serially connected; they switch off at 90 degrees. The name is ILMOTWIND1 for interlock motor 1 winding over-temperature.

These switches are type: Uchiya-UP6 90 Deg.

Cable Type: Filotex ET.63253 (9 twisted pairs, individually shielded with a common drain for ground). The two wires of a pair are connected at two consecutive pins (pins 1&2 for the first pair, pins 3&4 for the second pair etc.)

Notes: Each individually shielded pair is routed to its destination. The common drain is connected to the earth point of the motor at one end, and to pin 18 at the other.

Motor Unit 1

Cables and connectors are numbered NTT.16/x0-00-zzz- where zzz are the component numbers as follows:

040: Cable Filotex ET.63253 (9* twisted pairs plus drain).
041: LEMO F.3.E.318.NAG7,7.
042: LEMO RASC3.E.318.NAG7,7.

Motor Unit 1 Connection Diagram

Motor Unit 2

Cables and connectors are numbered NTT.16/x0-00-zzz- where zzz are the component numbers as follows:

043: Cable Filotex ET.63253 (9* twisted pairs plus drain).
044: LEMO F.3.E.318.NAG7,7.
045: LEMO RASC3.E.318.NAG7,7.

Motor Unit 2 Connection Diagram

Motor Unit 3

Cables and connectors are numbered NTT.16/x0-00-zzz- where zzz are the component numbers as follows:

046: Cable Filotex ET.63253 (9* twisted pairs plus drain).
047: LEMO F.3.E.318.NAG7,7.
048: LEMO RASC3.E.318.NAG7,7.

Motor Unit 3 Connection Diagram

Motor Unit 4

Cables and connectors are numbered NTT.16/x0-00-zzz- where zzz are the component numbers as follows:

049: Cable Filotex ET.63253 (9* twisted pairs plus drain).
050: LEMO F.3.E.318.NAG7,7.
051: LEMO RASC3.E.318.NAG7,7.

Motor Unit 4 Connection Diagram

3.4.10 Other Interlock Connections

Locking Device (Altitude axis only)

Cable type: 2*2*AWG22 (shielded twisted pair plus drain).
Length: 12m.
Switch type: Telemecanique XCK-M.


SIGNAL	TS6	COLOUR	LOCK PIN TS
Interlock Chain (+)	Pin 3	yellow	Pin1 (+24V if contact only this contact opened)
Interlock Chain (-)	Pin 4	green	Pin 2
ALILLOCK (Status)	Pin 5	pink	Pin 3
ALILLOCK (gnd)	Pin 6	grey	Pin 4
Schield	Pin 7	-	GND

Manual Drive: Brake Disengaged (Altitude axis only)

Switch type: Telemecanique XCK-M.


SIGNAL	TS6	COLOUR	MANUAL DRIVE TS
Interlock Chain (+)	Pin 9	yellow	Manual drive connector pin 3
Interlock Chain (-)	Pin 10	green	Manual drive connector pin 4
ALILBRMAN (Status)	Pin 11	pink	Manual drive connector pin 1
ALILBRMAN (gnd)	Pin 12	grey	Manual drive connector pin 2
Brake Disengage (control)	Pin 13	white	Brake connector pin 1
Brake Disengage (gnd)	Pin 14	brown	Brake connector pin pin 2
Shield	Pin 17	-	Brake connector GND

Interlock Limit Switch (Altitude axis only)

Switch type: Telemecanique XCK-M (switch, XESP-2051, snap action).
Interlock: Normally closed contact.
Computer signal: Normally open contact.

-Interlock 10 degree


SIGNAL	TS6	COLOUR	LIMIT SWITCH TS
Interlock contact (+)	Pin 27	grey	17)
Interlock contact (-)	Pin 28	pink	18)
ALILNEGLIM* (Status)	Pin 34	green	19)
ALILNEGLIM* (gnd)	Pin 35	yellow	20)

-Interlock 95.3 degree


SIGNAL	TS6	COLOUR	COMMENTS
Interlock contact (+)	Pin 21	brown/green	+24V if contact only this contact opened
Interlock contact (-)	Pin 22	white/green	.
ALILPOSLIM* (Status)	Pin 24	yellow/brown	23)
ALILPOSLIM (gnd)	Pin 25	yellow/white	24)
Schield	Pin 26	-	GND

Over-ride (the over-ride push-button is located in the PI Controller Chassis)

Button type: RAFI Nb.


SIGNAL	TS6	TS10	PUSH BUTTON
.	Pin 36	1	.
No signal	Pin 37	2	.
.	.	3	1
.	.	4	2

Emergency Stop - An Emergency Stop button is provided near to each VME chassis. One contact generates the ILEMSTO signal to the VME. The second is connected in a chain with all other Emergency Stop buttons.

See the NTT General Maintenance Information ( Section 1.5) for interconnection details.


SIGNAL	TS6	TS7	COLOUR	PUSH BUTTON
AZIMELSTO	.	Pin 9	grey	3) contact I
GND VME	.	Pin 10	pink	2) contact I
Interlock chain	Pin 38	.	green	4) contact II
Interlock chain	Pin 39	.	yellow	1) contact II

3.4.11 Control Rack Connections

Proximity Switch

Switch type: Baumer IFR 08.2415).


SIGNAL	TS3	MTS1	COLOUR	COMMENTS
+V Supply	1	.	brown	.
VSPOSLIMI*	2	31	white	Altitude 95.3 deg proximity limit switch
OV Return	3	.	green	.
Ground	4	.	shield	.
+V Supply	5	.	yellow	.
VSNEGLIMI*	6	29	grey	Altitude 10 deg proximity limit switch
OV Return	7	.	pink	.
Ground	8	.	shield	.

3.5 ALTITUDE AND AZIMUTH CONTROL CABINETS

The AL and AZ axes of the telescope are each controlled by two racks. The first one contains the processor and the encoder electronics; the second one is dedicated to the main power distribution, the power amplifiers and the interlock. The layout of the Power Rack is shown in a drawing; refer to Subsection 3.6.2.

3.5.1 Explanation of Terms

The numbering is as follows, NTT.16/xx-yy-zzz where:

16: Defines electronics.
xx: Defines the system (10 = azimuth; 20 = altitude).
yy: Defines rack number (01 = Control Rack; 02 = Power Rack).
zzz: Defines an item belonging to a rack.
TS-nn: Terminal Strip (nn = Terminal Strip number).
A W E.n: Absolute Encoder Evaluation Electronics.
E X E: Incremental Encoder Electronics.
RL.n: 5V relay for computer outputs to Power Rack.

3.5.2 Control Rack

Reference number: NTT.16/x0-01-

MTS1: Connection to AWE1 and AWE3.
MTS2: Connection to AWE2 and AWE4.
MTS3: Connection to Power Amplifier Interlock Sync signals.
MTS4: Connection to Interlock signals.
MTS5: Connection to Limit Switch.
MTS6: Connection to EXE702.
MTS7: Connection to Analog I/O Board.
TS1: Supply lines for AWE1 and AWE3 Opto-couplers (not used).
TS2: Supply lines for AWE2 and AWE4 Opto-couplers (not used).
TS3: Connections for limit switch signals.
TS4: Interconnections to Power Rack (digital).
TS6: +5V VME supply.

Control Rack, Front and Rear Views

3.6 AL/ AZ MAINTENANCE INFORMATION

3.6.1 Introduction

This section lists the maintenance information for the NTT Altitude/ Azimuth electronics systems, and associated drawings and data sheets. Refer to Section 3.1 for a detailed description.

3.6.2 Drawing List


TITLE/ SUB-TITLE	DRAWING NAME	LAST UPDATE	DRAWING NUMBER
AL/AZ Interconnection	.	24-10-88	CS-E-1468
Cabling Layout	.	.	.
- Top View	1	14-10-87	CS-E-1467
- Arm B View	2	13-10-87	CS-E-1466
- Arm A View	3	13-10-87	CS-E-1465
Functional Diagram Cascade Controller	.	11-06-87	CS-E-1450
Functional Diagram AL/AZ Drives	.	11-06-87	CS-E-1449
Motor Rotation Directions	.	.	CS-E-1654
- Azimuth	1	15-03-90	.
- Altitude	2	15-03-90	.
Motor Drive Cabling	.	.	.
- Alt/Az	1	07-05-87	CS-E-1436
- Internal	2	24-04-87	CS-E-1430
Azimuth Interlock Chain, Wiring Diagram (Sht 1)	\AZINTL1.SCH	13-08-96	CS-E-1409
Azimuth Interlock Chain, Wiring Diagram (Sht 2)	\EMSTCH2.SCH	16-10-96	CS-E-1613
Azimuth Interlock Chain, Wiring Diagram (Sht 3)	\EMSTCH3.SCH	06-09-96	CS-E-1613
Azimuth Interlock Chain, Wiring Diagram (Sht 4)	\EMSTCH4.SCH	06-09-96	CS-E-1613
Azimuth Interlock Chain, Wiring Diagram (Sht 5)	\AZINTL2.SCH	13-08-96	CS-E-1409
Altitude Interlock Chain, Wiring Diagram (Sht 1)	\ALINTL1.SCH	28-03-90	CS-E-1410
Altitude Interlock Chain, Wiring Diagram (Sht 2)	\ALINTL2.SCH	28-03-90	CS-E-1410
Relay, 6 Poles	\RELAY6P.SCH	28-03-90	RELAY6P.SCH
Emergency Stop Pushbutton Wiring	\EMBUTTON.SCH	28-03-90	CS-E-1460
PI Controller Chassis	.	15-03-90	CS-E-1447
PI Controller Schematic	.	25-04-90	CS-P-1364
PI Controller Filter	.	31-03-89	CS-E-1482
PI Chassis Cable	\PICABLE.SCH	28-03-90	PICABLE.SCH
Engineering Panel	\ENGPAN.SCH	28-03-90	ENGPAN.SCH
Brake Amplifier	.	31-03-89	CS-E-1437
Brake Connections	\BRAKCONN	28-03-90	CS-E-1441
Power Amplifier Connections	.	.	.
- AZ	1	25-04-90	CS-E-1446
- AL	2	25-04-90	.
TS Connection List, Power Rack	.	.	CS-E-1445
- AZ	1	28-03-90	.
- AL	2	28-03-90	.
AL/AZ Power Distribution	.	.	.
- Schematic Diagram	\POWDIST1.SCH	24-10-90	POWDIST1.SCH
- Wiring Diagram	.	24-10-90	POWDIST2.SCH
AL/AZ Power Rack Layout	\PRLAYOUT.SCH	25-04-90	PRLAYOUT.SCH
Control Rack Interconn. Signals	1	15-03-90	CS-E-1443
.	2	25-04-90	CS-E-1444
5V Relay	.	15-03-90	CS-P-1532
Control Rack, AWE to Computer	.	19-01-88	CS-E-1442
EXE 702 to IEC Card Connections	.	03-04-89	CS-E-1439
Time Distributor	.	03-04-89	CS-E-1464
VME Chassis	.	.	.
- Power Supply	1	06-05-87	CS-E-1434
- Standard Cabling	2	29-04-87	CS-E-1433
- Serial Link	3	25-06-87	CS-E-1452
VME Sysreset Stretcher	.	11-11-88	CS-P-1558
- Parts List	.	26-08-88	CS-P-1558
.	.	.	/ESO-46
- PCB Layout	.	.	CS-P-1558
Cooling of Cabinets	\COOLING.SCH	20-06-90	COOLING.SCH

3.6.3 Data Sheets


DESCRIPTION	NO. OF SHEETS
Heidenhain Absolute Encoder ERO 7001	31
Heidenhain SAE interface	1
Heidenhain IK320.1 encoder counter	.
Heidenhain Adjustment Procedure for EXE 702 "Abgleichanleitung"	2
ESO Tech. Spec. for Torque Motors and Tachometers	4
STROMAG Electromagnetic Brake EFM 41 T	1
SERVOWATT Power Amplifier Document	17
Staefa Cooling System Document	14