ABB IIMCL01 Infi 90 Communication Link Termination Module

The ABB IIMCL01, also cataloged as the IIMCL-01 Loop Module, operates as a dedicated hardware component for multi-bus communication link termination and physical signal conditioning within ABB Bailey Infi 90 and Net 90 DCS platforms.

Hardware Specifications

Backplane Bus Communication Velocity & Protocol Conversion Latencies

The ABB IIMCL01 maintains high backplane bus communication velocity by terminating internal loop signals and balancing differential line impedances across multi-bus nodes. By managing protocol conversion latencies through onboard line drivers, the module prevents signal reflections on high-speed serial segments. Up to 1500 V RMS galvanic isolation protects the backplane execution logic against transient voltage spikes originating from field communication buses.

Frequently Asked Questions

Q: How are termination resistors configured on the IIMCL01 for different communication protocols?

A: Integrated termination resistors are selected manually via physical onboard hardware jumpers depending on whether the bus segment requires RS-485, CAN bus, or proprietary Multibus end-of-line impedance matching.

Q: What diagnostic indicators are provided on the module front edge?

A: The board features 24 bi-colored LEDs that provide real-time status indication for individual channel activity, transceiver states, and bus fault conditions.

Q: What power inputs are required to operate the module hardware?

A: The IIMCL01 operates from an input supply voltage range of 12 to 24 VDC with a maximum current draw of 100 mA, while providing an auxiliary 5 VDC, 200 mA output for fieldbus interface components.

Field Installation Guidelines

• Confirm that backplane supply power is de-energized before inserting or extracting the IIMCL01 board from the module mounting unit.
• Set the 4-position hardware DIP switch to configure baud rate, operating mode, and node addressing prior to sliding the card into its designated rack guide.
• Verify jumper selection for end-of-line termination resistors, ensuring line termination is enabled only at the physical end nodes of RS-485 or CAN network segments.
• Connect all cable shield braids securely to the enclosure grounding bar to eliminate common-mode noise and satisfy system EMC compliance requirements.