ABB IMMPI01 INFI 90 Multi-Function Processor Interface Module

The ABB IMMPI01, also cataloged as the IMMPI01 Multi-Function Processor Interface Module, operates as a dedicated hardware component for host-to-controller communication execution within ABB Bailey INFI 90, Symphony Plus, and Harmony platforms. It bridges supervisory host computers to INICT03 modules using dual RS-232-C serial ports and a SCSI interface, ensuring real-time data buffer exchange across backplane assemblies.

Hardware Specifications

Backplane Bus Communication & Serial Interface Scaling

The IMMPI01 module executes high-speed serial data translation through dedicated RS-232-C channels and an onboard SCSI interface, maintaining high-density backplane bus communication velocity across INFI 90 module racks. Operating directly on a +5 VDC supply rail via the P1 connector, the microprocessor-based circuit handles protocol conversion latencies without overloading the main controller bus. Physical routing through connector P6 links directly to the INICT03 communication module, while connector P3 anchors the NTMP01 termination unit to prevent signal reflection across high-frequency serial lines.

Frequently Asked Questions

Q: What power rails must be active on the backplane prior to installing the IMMPI01 module?

A: The module operates exclusively from a regulated +5 VDC rail (+/-5%) supplied via backplane connector P1. Verify voltage levels on the power bus under load before inserting the module to prevent serial communication errors or board reset cycles.

Q: How are external serial communication links terminated on the IMMPI01 module assembly?

A: Cable terminations route directly through the P3 connector linked to an NTMP01 termination module. Proper line impedance matching must be maintained across the RS-232-C and SCSI lines to prevent high-speed data frame corruption.

Field Installation Guidelines

Adhere strictly to standard industrial installation steps to preserve signal integrity and hardware stability:

1. Insert the IMMPI01 single-slot PCB into the designated INFI 90 module rack position, seating rear connectors P1, P3, and P6 completely into the backplane frame.
2. Fasten the faceplate retention screws firmly to establish proper mechanical bonding and grounding with the cabinet chassis.
3. Attach interface cabling from the INICT03 module to connector P6, and connect the NTMP01 termination unit to connector P3.
4. Separate RS-232-C and SCSI signal lines from high-voltage AC cables and inductive load wiring within cabinet raceways.
5. Connect external cable shields to the main cabinet earthing busbar at a single point to mitigate ground loop noise across communication interfaces.