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Product Overview
The ABB IMMFP01 is a Multi-Function Processor (MFP) module used in ABB Bailey INFI 90 and Network 90 process-control systems. It functions as a programmable control processor, handling control logic, process data, and communication with associated I/O modules. The original technical documentation specifies a 32-bit processor running at 16 MHz, with 512 KB ROM, 256 KB RAM, and 64 KB NVRAM. Power is supplied from the system backplane at +5 VDC and approximately 2 A, with typical consumption of 10 W. The module supports two RS-232-C serial ports, or a combination of RS-232-C and RS-485 depending on configuration.
For legacy DCS maintenance, this is a controller-level spare rather than a simple communication card. Correct configuration of switches, jumpers, memory, and Controlway/module-bus addressing is important during replacement.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | IMMFP01 |
| Manufacturer | ABB Bailey |
| Product Type | Multi-Function Processor Module |
| Series | INFI 90 / Network 90 |
| Processor | 32-bit, 16 MHz |
| Memory | 512 KB ROM, 256 KB RAM, 64 KB NVRAM |
| Power | +5 VDC @ 2 A; 10 W typical |
| Communication / Protocol | Controlway, Module Bus, RS-232-C / RS-485 |
| Operating Temperature | 0 to 70 °C |
| Mounting | One slot in standard module mounting unit |
| Dimensions (HxWxD) | Approx. 177.8 × 35.6 × 298.5 mm |
| Weight | Approx. 0.5–0.64 kg, depending on listing |
| Typical Interfaces | RS-232-C serial ports, Controlway, I/O Expander Bus |
| Compliance | Refer to applicable INFI 90 system documentation |
The manufacturer documentation states that the faceplate is approximately 35.56 mm wide by 177.80 mm high, while the module occupies one mounting-unit slot. Third-party listings provide somewhat different complete-module dimensions and weights, so these values should be verified against the physical unit before transport or cabinet planning.
ABB IMMFP01
Key Features and Benefits
- Multi-function processor for ABB Bailey INFI 90 process-control architecture.
- Executes configurable control strategies and manages process I/O.
- Supports analog and digital control applications through associated I/O modules.
- Provides serial communication capabilities for system integration and maintenance.
- Supports Controlway or module-bus operation through configurable hardware settings.
- Includes onboard ROM, RAM, and NVRAM for firmware, runtime data, and configuration storage.
- Suitable as a replacement spare for legacy INFI 90 installations where continued controller availability is required.
One practical detail should not be overlooked: the IMMFP01 uses configurable DIP switches for addressing and operating modes, while jumper J5 can affect compatibility with different power-system arrangements. ABB’s technical documentation specifically warns against changing certain factory jumper settings.
Related Models
IMMFP02: A related Bailey Multi-Function Processor with a larger control capacity than the IMMFP01. It belongs to the same processor family but should not be considered a drop-in replacement without system verification.
IMMFP03: A later-generation Multi-Function Processor designed for expanded control applications and higher configuration capacity.
IMMFP03B: Another member of the Bailey MFP family, providing expanded processing capability for INFI 90 architectures.
IMMPI01: A Multi-Function Processor interface module associated with the IMMFP03 family and providing additional communication interfaces.
Installation and Maintenance
Before replacement, record the existing switch positions, jumper configuration, module address, firmware information, and connected communication wiring. This is especially important for an older DCS where configuration may have been customized during commissioning.
Use appropriate ESD protection and avoid touching exposed circuitry or backplane contacts. After installation, verify module startup indicators, Controlway or module-bus communication, configuration integrity, and associated I/O operation. Where possible, compare the replacement unit’s hardware revision with the failed unit before returning the process to automatic control.
For spare inventory, store the module in an antistatic package in a clean, dry environment. Keeping the original configuration record with the spare can save considerable troubleshooting time during an unplanned shutdown.
Product Warranty
Warranty terms depend on whether the unit is supplied as new, surplus, used, or refurbished. The purchasing record should clearly document the exact part number, hardware condition, testing status, and warranty period.
For ABB IMMFP01, compatibility with the installed INFI 90 architecture should be verified before purchase and installation, particularly when replacing an older controller with a different hardware revision.
