| 4501 | 621-0019 | Honeywell | Honeywell 621-0019 Pulse Quadrate Module | instock |
| 4502 | 621-0020 | Honeywell | Honeywell 621-0020 Universal Analogue Module | instock |
| 4503 | 621-0021 | Honeywell | Honeywell 621-0021 Enhanced Diagnostic Module | instock |
| 4504 | 621-0022 | Honeywell | Honeywell 621-0022 A 8 Channel AN Input Calib. | instock |
| 4505 | 621-0024 | Honeywell | Honeywell 621-0024 Pulse Input (4 Input) | instock |
| 4506 | 621-0096 | Honeywell | Honeywell 621-0096 Serial I/O Module | instock |
| 4507 | 621-0306 | Honeywell | Honeywell 621-0306 High Speed Counter Module | instock |
| 4508 | 621-0576 | Honeywell | Honeywell 621-0576 24V DC Module 24 I/P 8 O/P 2A | instock |
| 4509 | 621-1100 | Honeywell | Honeywell 621-1100 115V AC / DC Input | instock |
| 4510 | 621-1101 | Honeywell | Honeywell 621-1101 115V AC / DC Isolated Input 6 Point | instock |
| 4511 | 621-1150 | Honeywell | Honeywell 621-1150 115V AC Input | instock |
| 4512 | 621-1151 | Honeywell | Honeywell 621-1151 115V AC Input | instock |
| 4513 | 621-1160 | Honeywell | Honeywell 621-1160 16 Point 115V AC Input | instock |
| 4514 | 621-1175 | Honeywell | Honeywell 621-1175 115V AC Input | instock |
| 4515 | 621-1180 | Honeywell | Honeywell 621-1180 32 Point 115V AC Input | instock |
| 4516 | 621-1200 | Honeywell | Honeywell 621-1200 230V AC / DC Input | instock |
| 4517 | 621-1201 | Honeywell | Honeywell 621-1201 230V AC / DC Isolated Input 6 Point | instock |
| 4518 | 621-1250 | Honeywell | Honeywell 621-1250 16 Point 240V AC Input | instock |
| 4519 | 621-1251 | Honeywell | Honeywell 621-1251 16 Point 240V AC Input Isolated | instock |
| 4520 | 621-1500 | Honeywell | Honeywell 621-1500 24V AC Input | instock |
| 4521 | 621-1550 | Honeywell | Honeywell 621-1550 24V AC Input | instock |
| 4522 | 621-2100 | Honeywell | Honeywell 621-2100 230V AC Output | instock |
| 4523 | 621-2101 | Honeywell | Honeywell 621-2101 115V AC Isolated Output 6 Point | instock |
| 4524 | 621-2102 | Honeywell | Honeywell 621-2102 115V AC Output Self Protected | instock |
| 4525 | 621-2150 | Honeywell | Honeywell 621-2150 115V AC Output | instock |
