ABB CI873A 3BSE092695R1 AC 800M Communication Interface Module

Configured for high-speed network integration in ABB System 800xA hardware setups, the ABB CI873A 3BSE092695R1 (CI873A Communication Interface Module) provides direct physical/electrical execution. The assembly interface operates as a dedicated master node on the controller CEX-Bus, executing EtherNet/IP and DeviceNet protocol stack translation at 10/100 Mbit/s to integrate motor starters, variable speed drives, and external field devices.

Hardware Specifications

Backplane Bus Communication Velocity and Network Integration

The CI873A interface processes high-speed backplane bus communication velocity across the AC 800M CEX-Bus architecture. Utilizing an internal DC/DC converter and local processing micro-logic, the module handles deterministic EtherNet/IP cyclic data packets without taxing the primary CPU controller cycles. The hardware design supports module-level hot-swapping under powered rack conditions and permits up to 6 redundant pairs per system. Internal diagnostic circuits continually monitor communication latencies and firmware flash memory states, automatically initiating bumpless failover execution to the backup interface module upon detection of transceiver errors or link loss.

Frequently Asked Questions

Q: Does the CI873A support physical cable line redundancy on its Ethernet port?

A: No, the module provides single RJ-45 port interface connectivity and relies on module-level redundancy (dual CI873A modules configured as a pair) to achieve high-availability network fault tolerance.

Q: How many CI873A communication interface modules can attach to a single CEX-Bus rack?

A: A single AC 800M controller setup supports a maximum of 12 communication units arranged along the CEX-Bus expansion rail.

Q: What power rail energizes the internal electronics of the CI873A module?

A: The module draws power directly from the +24 VDC supply provided through the underlying CEX-Bus backplane rail, consuming approximately 160 mA under typical operational loads.

Field Installation Guidelines

Ensure power isolation of the CEX-Bus rail or confirm redundant system status before adding or replacing the CI873A module. Slide the unit vertically into the corresponding CEX-Bus base slot until the mechanical retention clips click firmly, verifying that the backplane pin header mates cleanly without pin deflection.

Use shielded twisted-pair (STP) Category 5e or Category 6 industrial Ethernet cabling terminated with metallic RJ-45 connectors. Maintain a clear physical separation between Ethernet data cables and high-voltage motor power lines inside cabinet ducts. Connect the underlying DIN rail mounting assembly directly to the main cabinet protective earth busbar with low-impedance grounding straps to ensure full ISA 71.04 G3 compliant EMC performance.