| Manufacturer | Industrial Automation |
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1785-BEM |
| Module Type | Backup Communications Expansion Module |
| Backplane Requirement | 0.6 Amperes at 5 Volts DC |
| DH+/RIO Interface | 2 |
| Operating System | Windows 95/NT |
| Bus Communcations | Local PCI 2.3 Compliant |
| LEDs | 1 Diagnosis/Status Per Channel |
| Max Modules Per System | 4 |
| Weight | 0.3 lbs (0.1 kg) |
| Coating | Conformal Coat |
| Required External Power | None |
| Typical AC Signal Delay (Off) | 29 (+/- 8) ms |
| Typical DC Signal Delay (Off) | 30 (+/- 7) ms |
| Wiring Arm | 1771-WN |
| Dimensions | 4.5 x 12.4 x 6.3 in (115 x 317 x 160 mm) |
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