1785-BCM/C

Product Overview

The 1785-BCM/C is a Backup Communication Module from Allen-Bradley, designed for use in a PLC-5 system. Installed in a local 1771 I/O chassis, it ensures high-speed redundancy communication between PLC-5 processors to maintain system reliability.

Electrical Characteristics

• Module Type: Backup Communication Module (BCM)

• Module Slot: 1771 I/O Chassis (local)

• Backplane Current Draw:

• BCM: 1.0 A @ 5 VDC

• BEM: 0.6 A @ 5 VDC

• Keying Positions:

• BCM: Between 8 and 10

• BEM: Between 34 and 36

Communication & Interface

• Communication Speed: HSSL at 1.2 Megabaud

• Wiring Arm: 1771-WG

• Customer Relay Output: 0.25 A @ 24 VDC (resistive load)

Environmental Conditions

• Operating Temperature: 0°C to 60°C (32°F to 140°F)

• Storage Temperature: –40°C to 85°C (–40°F to 185°F)

• Relative Humidity: 5% to 95% (non-condensing)

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