ABB Bailey IMCOM04 Controller Module

This advanced controller module manages communication for ABB Bailey INFI 90 systems. It interfaces the master controller with remote I/O devices and other network nodes. Therefore, it enables distributed control architecture for large power generation and industrial plants.

Physical and Network Specifications

The ABB Bailey IMCOM04 measures 25.0 cm in length and 18.0 cm in width. Moreover, its module weight equals approximately 0.85 kg for rack mounting. A single 48-pin male connector links this module to the INFI 90 backplane. Additionally, the unit includes a dedicated communication port for network connectivity.

Parameter	Specification
Brand	ABB Bailey
Full Model	IMCOM04
Category	Advanced Controller Module
Dimensions (L x W x H)	25.0 cm x 18.0 cm x 5.5 cm (9.84″ x 7.09″ x 2.17″)
Module Weight	0.85 kg (1.87 lbs)
Backplane Interface	1 x 48-pin Male Connector (INFI 90 Rack)
Power Supply Input	5 VDC from Backplane (1.2 A Typical)
Power Consumption	6.0 W (Typical)
Processor Type	16-bit Microcontroller (16 MHz)
Program Memory	128 kB ROM (Firmware)
Data Memory	64 kB RAM (Battery Backed)
Backup Battery	Internal Lithium (3V, 5 Year Life)
Communication Port	1 x 9-pin D-Sub Female (RS-232/RS-422)
Supported Protocols	Bailey PC90 + Modbus RTU
Baud Rate Range	1200 to 38400 baud
RS-422 Cable Length	500 meters (1640 feet) Maximum
RS-232 Cable Length	15 meters (49 feet) Maximum
Maximum Nodes per Network	32 Devices
Scan Time	10 ms for 256 I/O Points
On-Board Components	1 Microcontroller + 2 UARTs + 3 Memory Chips + 1 Line Driver + 2 Optocouplers + 6 Protection Diodes + 1 Voltage Regulator + 1 Isolation Transformer
Energy Storage	3 x 220 µF Electrolytic Capacitors (35V) + 2 x 10 µF Tantalum (25V) + 1 x CR2032 Backup Battery
Battery Backup Time	5 Years (Typical for RAM Retention)
Isolation Rating	1500 Vrms (Port to Backplane)
Operating Temperature	0°C to +55°C (32°F to 131°F)
Storage Temperature	-25°C to +85°C (-13°F to 185°F)
Mounting Type	INFI 90 Rack (Single Slot)
Status Indicators	1 Green LED (Power) + 1 Green LED (Run) + 1 Yellow LED (Port Activity) + 1 Red LED (Fault)

Communication Controller Features and Protocol Support

The ABB Bailey IMCOM04 functions as a dedicated communication coprocessor for INFI 90 controllers. Specifically, it offloads serial communication tasks from the main loop processor. In addition, the module supports Bailey PC90 protocol for legacy device connectivity. Moreover, Modbus RTU allows integration with third-party HMIs, drives, and SCADA systems. Furthermore, the 16-bit microcontroller handles protocol conversion without burdening the main CPU. Consequently, this module connects INFI 90 systems to a wide range of external devices.

RS-232 and RS-422 Interface Flexibility

This advanced controller module features a switch-selectable RS-232 or RS-422 interface. For instance, RS-232 suits short-distance connections up to 15 meters for local HMIs. In addition, RS-422 allows cable runs up to 500 meters for remote installations. Moreover, the 9-pin D-sub connector accommodates both wiring schemes without adapters. Furthermore, the isolated port protects against ground loops and electrical noise. Thus, you can configure the module for point-to-point or multi-drop networks easily.

Energy Storage and Data Retention

This communication module stores energy using five onboard capacitors for power filtering. Specifically, three electrolytic capacitors smooth the 5 VDC supply for stable processor operation. In addition, two tantalum capacitors provide high-frequency noise suppression for communication circuits. Furthermore, a replaceable lithium battery retains configuration parameters and buffer data. Therefore, the ABB Bailey IMCOM04 preserves network settings for up to five years without external power.

Installation and Diagnostic Indicators

Four LED indicators provide operational status at a glance on this module. First, a green Power LED lights when the 5 VDC backplane supply is present. Second, a green Run LED flashes during normal firmware execution. Third, a yellow Port Activity LED illuminates during data transmission or reception. Finally, a red Fault LED indicates hardware errors, watchdog timeouts, or bus cable breaks. Additionally, the module includes a locking ejector for secure backplane insertion. Thus, you can diagnose communication status instantly without external tools.