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PL19, PL20, PL21 and PL40 autochange rack cables
| Cable name | Part number | Length |
| PL19 | A-1051-0199 | 5 m (196.85 in) |
| PL20 | A-1051-0045 | 10 m (393.7 in) |
| PL21 | A-1051-0102 | 15 m (590.55 in) |
| PL40 | A-1054-0002 | 30 m (1181.1 in) |
These straight ACR1 autochange rack cables have an in-line 25-pin D-type socket at end 'A' and a 25-pin D-type plug at end 'B'. They relay communications between the ACC2-2 controller and ACR1 rack. Connections are pin-to-pin, with the red / grey wire connected to pin 1 at each end.
Pin number | Signal | Pin number | Signal |
|---|---|---|---|
1 | Supply to ACR1 motor | 14 | Supply to ACR1 motor |
2 | 0 V rack motor return | 15 | 0 V motor return |
3 | Rack 0 V return for ACR1 motor | 16 | Rack 0 V |
4 | 'Screwdriver' position feedback | 17 | Front IRED beam detector signal |
5 | Rear IRED beam detector signal | 18 | Rack probe contact no. 1 |
6 | Rack probe contact no. 2 | 19 | ACR1 overtravel signal no. 1 |
7 | Rack precision reference voltage for the ACR1 position potentiometer | 20 | ACR1 'probe active' indicator no. 1 |
8 | Rack lock error indicator no. 4 | 21 | ACR1 'cycle error' indicator no. 3 |
9 | ACR1 0 V | 22 | + 15 V supply to ACR1 circuits |
10 | Rack 'change cycle' indicator no. 0 | 23 | Ground sense |
11 | Rack 0 V, reserved for future use | 24 | Rack 0 V, reserved for future use |
12 | Rack 0 V, reserved for future use | 25 | Rack 0 V, reserved for future use |
13 | n/a |