ABB CI845 3BSE075853R1 Ethernet Fieldbus Communication Interface Module

Configured for high-speed Ethernet protocol execution in System 800xA, the ABB CI845 3BSE075853R1 (CI845 Fieldbus Communication Interface Module) provides direct physical/electrical execution. Operating as an Ethernet Fieldbus Communication Interface (FCI) slave, the hardware manages real-time field data transfer between AC 800M controllers and down-stream I/O networks, supporting up to 192 Select I/O channels or 12 redundant S800 I/O modules over standard industrial Ethernet infrastructure.

Hardware Specifications

Ethernet Deterministic Networks & Built-In Power Voting

The CI845 module interfaces with deterministic Ethernet network topologies to deliver low-latency HART v7 pass-through variables and millisecond-accurate Sequence of Events (SOE) timestamping to the host application. Featuring built-in power voting circuit architecture, the internal power stage accepts dual redundant 19.2 VDC to 30 VDC inputs, executing real-time voltage level supervision across Power Supply A and B feeds while monitoring internal cabinet temperatures. The hardware includes an integrated mechanical locking slider that physically isolates and turns off module electrical power prior to unlatching from the baseplate, preventing electrical arcing during live hot-swap procedures in active or hazardous area enclosures.

Frequently Asked Questions

Q: How does the mechanical locking slider function during field module replacement?

A: The slider mechanically locks the module onto its mounting baseplate while simultaneously controlling an internal power switch, removing internal operating power before the physical connectors disengage from the bus.

Q: What mounting baseplates support redundant CI845 module execution?

A: Redundant Ethernet FCI configurations require two CI845 modules installed on either a TU860 or TU865 Ethernet Field Communications Interface Module Termination Unit (MTU).

Q: Can a single CI845 interface communicate simultaneously with Select I/O and S800 I/O hardware?

A: Yes, the Ethernet interface supports concurrent communications for up to 192 Select I/O Signal Conditioning Module (SCM) channels alongside 12 single or redundant S800 I/O modules over the same network connection.

Field Installation Guidelines

Mounting the CI845 requires seating the housing onto the designated TU860, TU865, or Select I/O baseplate unit until the mechanical keying arrangement verifies proper slot alignment. Engage the mechanical locking slider fully to apply power and lock the physical chassis onto the DIN-rail baseplate assembly. Ground all Ethernet cable shielding through 360-degree grounding clamps at the cabinet entry gland plate to prevent electromagnetic interference from distorting high-speed packet transfer. Maintain clear vertical airflow paths above and below the module base to preserve passive thermal cooling across the ambient operating temperature envelope of -40 deg C to +70 deg C.