ABB Bailey IMQRS12 PLC Module | 2ms/1K Rungs 32KB

Module Overview

This PLC module provides programmable logic control for INFI 90 system racks. You can install ABB Bailey IMQRS12 directly into any INFI 90 VME rack slot. The unit executes ladder logic sequences and manages local I/O scanning. It supplements the main controller for fast logic operations.

Technical Specifications

Parameter	Value
Dimensions (W x H x D)	233 mm x 160 mm x 20 mm
Weight	0.51 kg
Processor type	16-bit microcontroller
Clock speed	20 MHz
Program memory	32 KB flash (non-volatile)
Data memory	8 KB SRAM (battery-backed)
Ladder logic capacity	2048 rungs maximum
Execution speed	2 ms per 1K logic rungs
Local I/O capacity	128 digital or 32 analog points
Scan rate	10 ms to 250 ms (selectable)
VMEbus interface	16-bit slave
Status indicators	3 LEDs (power, run, fault)
Battery	3.6V lithium (replaceable)
Battery life	4 years typical
Total onboard components	286 discrete parts
Energy storage type	Lithium battery + tantalum capacitors
Energy storage rating	560 µF at 16V DC
Operating temperature	0°C to +55°C

Board Layout and Components

The PCB places the 16-bit CPU at the center of the board. A lithium battery sits on the right side for data retention. Moreover, 286 discrete components include memory chips and VME bus drivers. Tantalum capacitors provide stable power for all logic circuits. Consequently, the module executes deterministic logic scans without CPU interruptions.

Installation Process

You can mount ABB Bailey IMQRS12 into any standard INFI 90 VME rack slot. The backplane connector supplies power and provides access to I/O data. Furthermore, configuration software downloads ladder logic via a serial port. LED indicators show module status and fault conditions clearly.

Performance Advantages

This module scans 1,000 ladder rungs in just 2 milliseconds typically. The 32 KB flash memory stores large logic programs permanently. Therefore, fast interlocking sequences run without burdening the main controller. The battery-backed RAM also retains data through power outages.

Safety and Compliance

ABB Bailey IMQRS12 meets CE and RoHS industrial standards. The board discharges stored energy below 3V within six seconds. Hence, technicians face minimal electrical risk during battery replacement or servicing.