The 40-Pin Mass Terminal block can provide terminations for the 32-channel input and output cards and the Sequence of Events card.
| Left hand pins (1-16) J3 | Channel nomenclature | Right hand pins (17-32) J4 | Channel nomenclature | ||
|---|---|---|---|---|---|
| 32-channel DI and DO | SOE | 32-channel DI and DO | SOE | ||
| Pin 1 | Channel 1+ | 1+ | Pin 1 | Channel 17+ | 9+ |
| Pin 2 | Channel 2+ | 1- | Pin 2 | Channel 18+ | 9- |
| Pin 3 | Channel 3+ | 2+ | Pin 3 | Channel 19+ | 10+ |
| Pin 4 | Channel 4+ | 2- | Pin 4 | Channel 20+ | 10- |
| Pin 5 | Channel 5+ | 3+ | Pin 5 | Channel 21+ | 11+ |
| Pin 6 | Channel 6+ | 3- | Pin 6 | Channel 22+ | 11- |
| Pin 7 | Channel 7+ | 4+ | Pin 7 | Channel 23+ | 12+ |
| Pin 8 | Channel 8+ | 4- | Pin 8 | Channel 24+ | 12- |
| Pin 9 | Channel 9+ | 5+ | Pin 9 | Channel 25+ | 13+ |
| Pin 10 | Channel 10+ | 5- | Pin 10 | Channel 26+ | 13- |
| Pin 11 | Channel 11+ | 6+ | Pin 11 | Channel 27+ | 14+ |
| Pin 12 | Channel 12+ | 6- | Pin 12 | Channel 28+ | 14- |
| Pin 13 | Channel 13+ | 7+ | Pin 13 | Channel 29+ | 15+ |
| Pin 14 | Channel 14+ | 7- | Pin 14 | Channel 30+ | 15- |
| Pin 15 | Channel 15+ | 8+ | Pin 15 | Channel 31+ | 16+ |
| Pin 16 | Channel 16+ | 8- | Pin 16 | Channel 32+ | 16- |
| Pin 17 | no connection | no connection | Pin 17 | no connection | no connection |
| Pin 18 | return | N/A | Pin 18 | return | N/A |
| Pin 19 | no connection | no connection | Pin 19 | no connection | no connection |
| Pin 20 | return | N/A | Pin 20 | return | N/A |