| Description | Pin on Ancillary Crate relay board | Pin on MVD Rack Relay terminal |
|---|---|---|
| First 10 pins (common returns) Pins 9 and 10 are unused | ||
| East Chiller 1 Power Return | East Pin 2 | Pin 1 |
| East Chiller 2 Power Return | East Pin 4 | Pin 2 |
| East Pump Return | East Pin 6 | Pin 3 |
| West Chiller 1 Power Return | West Pin 2 | Pin 4 |
| East fan Return | East Pin 8 | Pin 5 |
| West fan Return | West Pin 4 | Pin 6 |
| West Pump Return | West pin 6 | Pin 7 |
| West chiller 2 Power Return | West pin 8 | Pin 8 |
| Second 10 pins Pins 19 and 20 are unused | ||
| East Chiller 1 Power (208 Vac) | East Pin 1 | Pin 11 |
| East Chiller 2 Power (208 Vac) | East Pin 3 | Pin 12 |
| East Pump (110 Vac) | East Pin 7 | Pin 13 |
| West Chiller 1 Power (208 Vac) | West Pin 1 | Pin 14 |
| East fan (110 Vac) | East Pin 5 | Pin 15 |
| West fan (110 Vac) | West Pin 5 | Pin 16 |
| West Pump (110 Vac) | West pin 7 | Pin 17 |
| West chiller 2 Power (208 Vac) | West pin 3 | Pin 18 |