| PART # | SYSTEM BOARDS | CONNECT PINS |
| 540-1281-01 | CPU,SCSI, and ALM | 2-3 4-5 6-20 |
| 540-1558-01 | CPU, SCSI, ALM, ALM-2, MCP, and SPC/S |
2-3 4-5 6-8-20 17-24 |
| PART # | SYSTEM BOARDS | CONNECT PINS |
| 540-1559-01 | MCP | 4-6 7-9 8-17 22-24 25-27 11-12-13 29-30-31 35-26 |
| PART # | SYSTEM BOARDS | CONNECT PINS |
| 540-1560-01 | ALM-2 | 1-10 12-2-4-6-8 13-3-5-7-9 |
| 501-1196-01 | IPC | 5-15 6-13 7-12 8-10 9-11 |
| PART # | DESCRIPTION |
| 530-1683-01 | Parallel Port to Video Port Loopback Cable |
| PART # | DESCRIPTION |
| 370-1381-01 530-1430-01 |
96-Pin High-Density Loopback Connector RS-449 Loopback Test Plug |
| PART # | DESCRIPTION |
| 370-1366-01 540-1558-01 |
96-Pin High-Density Loopback Connector RS-232/RS-423 Loopback Test Plug |