ABB CI857K01 3BSE018144R1 Communication Interface Module

The ABB CI857K01 3BSE018144R1, also cataloged as the CI857 Communication Interface Module, operates as a dedicated hardware component for INSUM switchgear communication and Ethernet data routing within AC 800M controller platforms.

Hardware Specifications

Backplane Bus Communication Velocity & I/O Density

The module connects to the CEX-Bus backplane assembly to establish high-speed backplane bus communication velocity and deterministic signal transfer across INSUM networks. Up to 6 CI857 modules can mount on a single AC 800M CEX-Bus platform, scaling I/O density to manage up to 128 Motor Control Units (MCUs) per module via two INSUM TCP/IP gateways. Internal power routing directly from the processor unit eliminates external 24 VDC wiring, maintaining low power dissipation while executing real-time switchgear time distribution and time stamping functions.

Frequently Asked Questions

Q: How is operating power supplied to the CI857 module on the CEX-Bus?

A: The module draws power directly from the main processor unit via the CEX-Bus backplane interface at approximately 150 mA at 24 VDC, requiring no external power supply wiring.

Q: What are the capacity limits for connecting Motor Control Units (MCUs) to a single module?

A: A single CI857 module supports up to 128 MCUs and 2 INSUM TCP/IP gateways. When deployed with high-capacity processors such as the PM864 or PM866, total system capacity reaches up to 256 MCUs across multiple interface cards.

Q: Can the CI857 module be replaced while the AC 800M controller is online?

A: Yes, the CI857 module supports hot-swapping on the TP853 baseplate, allowing live module replacement without powering down the CEX-Bus backplane or interrupting adjacent communication modules.

Field Installation Guidelines

Mount the TP853 baseplate (60 mm width) securely to the DIN rail before sliding the CI857 interface module onto the CEX-Bus connector chain. Ensure the baseplate locking clip engages fully to verify protective grounding continuity.

Connect the Ethernet network cable using an 8-pin RJ-45 connector configured for 10 Mbit/s communication. Maintain physical separation between Ethernet signal cabling and high-voltage AC power lines to suppress electromagnetic interference. Ensure cabinet ventilation maintains ambient operating temperatures between 0 and +55 deg C to ensure steady thermal dissipation.