ABB Bailey NLMM01 | INFI 90 Logic Master Module

The ABB Bailey NLMM01 executes control logic for INFI 90 distributed control systems. This Logic Master module performs Boolean math, timers, counters, and sequence functions. You can program it using Bailey function block language on a PC workstation. It communicates with other modules via the INFI 90 plant bus. Consequently, this module handles discrete and analog control for industrial processes.

Technical Specifications Overview

Parameter	Detailed Specification
Model	ABB Bailey NLMM01
Category	INFI 90 Logic Master Module (LMM)
Processor	16-bit microprocessor (Intel 80C186 compatible)
Program Memory	128 KB EPROM (non-volatile)
Data Memory	64 KB RAM (battery-backed)
Execution Speed	10 ms typical scan time
Number of Logic Blocks	Up to 1000 function blocks
Communication Interface	INFI 90 plant bus (redundant)
I/O Capacity	256 digital / 128 analog points
Operating Voltage	5V DC from backplane (1.2 A typical)
Energy Storage	Lithium battery for RAM retention
Battery Life	Approximately 3 years
Dimensions	Double-wide module (approx. 300 mm x 210 mm)
Weight	1.25 kg (1250 grams)
Indicators	6 LEDs (power, run, com, fault, battery, redundant)
Operating Temperature	0°C to 60°C

Functional Features and Control Capabilities

The ABB Bailey NLMM01 executes continuous logic for process automation tasks. You can configure control strategies using Bailey CADENCE software. The module handles PID loops, interlocking logic, and sequence control seamlessly. Furthermore, it supports peer-to-peer communication with other LMMs over the plant bus.

This Logic Master includes a real-time clock for time-stamped events. The battery preserves program and data during power interruptions. Additionally, the module supports redundant configurations for critical applications. The LED indicators provide immediate status feedback for troubleshooting.

Installation and Configuration Steps

First, insert the ABB Bailey NLMM01 into a designated slot in the INFI 90 chassis. Next, connect the plant bus cables to the rear termination panel. Then, power up the system and verify the LEDs enter run mode. Finally, download your configuration from the engineering workstation to the module.

You must replace the lithium battery every three years during scheduled outages. The module loses all RAM data after battery discharge. Always upload your current configuration before replacing the battery. Furthermore, use redundant LMMs for processes requiring high availability.

This Logic Master works perfectly for boiler control and chemical reactors. It also manages material handling and batch processing systems. The ABB Bailey NLMM01 integrates with all INFI 90 I/O subsystems. You can upgrade older modules without changing field wiring.