Connecting Delta Tau accessory board ACC-8S with ACS SPC-3 driver

The stepper interface board ACC-8S gets a ribbon cable from PMAC. It puts out step and direction pulses which are fed to the ACS motor driver. All motor connectors on ACC-8S are Phoenix type (each wire/pin is held by a screw).

Table 4.3 lists all the pin numbers to connect 25 pin connector on front panel of ACS SPC-3 interface module to PMAC ACC-8S board.

For stepper encoder and limit switches to work +5VDC has to be brought to the encoder and limits power supply inputs on the back of ACS crate (SPR-9 equipment rack). Connectors J20 (encoder power supply) and J9 (limit switches power supplies) need +5VDC on J9+V and J20+V; ground is connected to J9GND and J20GND. Connectors TB2 and TB3 of ACC-8S provide +5VDC on pin 7 for encoder power. Pin 8 is ground. Connectors J20 and J9 are 2-pin Phoenix type.

Table 4.3: Connection of PMAC accesory board ACC-8S to ACS interface module SPC-3.

ACS SPC-3 25 pin		PMAC ACC-8S
pin		TB3 External Encoder Input	TB4 External Flag input	TB6 Motor Drive Out
1	NC
2	NC
3	Step +			1 STEP1 +
4	Direction +			3 DIR +
5	Limit +		2 PLIM1 Pos Lim
6	Limit -		3 MLIM1 Neg Lim
7	Encoder A +	1 CHA1+
8	Encoder B +	3 CHB1+
9	Index +
10	M Home		4 HOME
11	Ground / Shield		5 Flag Return
12	Driver Status
13	NC
14	NC
15	NC
16	Step -			2 STEP1 -
17	Direction -			4 DIR-
18	NC
19	NC
20	Encoder A -	2 CHA1-
21	Encoder B -	4 CHB1-
22	Index -
23	E Home
24	Ground / Shield
25	NC