Allen-Bradley 1769-L31 CompactLogix Controller

Overview

The Allen-Bradley 1769-L31 is a reliable and powerful controller from the CompactLogix family. This Programmable Automation Controller (PAC) is designed for small to medium-scale applications, offering superior performance with its advanced communication capabilities and flexible expansion options.

Key Features

Dual RS232 Communication Ports: Two ports for flexible communication, including DF1, DH-485, and ASCII protocols.
Memory: 512 KB of user memory, with support for non-volatile memory using 1784-CF128 or 1784-CF64 CompactFlash cards.
I/O Module Support: Supports up to 16 I/O modules locally, with expansion up to 3 banks for large-scale systems.
Power Supply Rating: Compatible with 1747-CP3 or 1756-CP3 power supply, and requires installation no more than four modules away from the power supply.
LED Status Indicators: Clear, independent LEDs for monitoring status, including RUN, FORCE, BAT, OK, I/O, DHC0, Channel 0, and Channel 1.

Technical Specifications

Specification	Details
Part Number	1769-L31
Weight	0.69 lbs (0.31 kg)
Memory	512 KB
Communication Ports	2 x RS232
Channel Isolation	Channel 0: Fully isolated<br>Channel 1: Non-isolated
Protocols Supported	DF1, DH-485, ASCII
Maximum I/O Modules Supported	16 Modules
Maximum I/O Banks Supported	3 Banks
Power Supply Distance Rating	1747-CP3 / 1756-CP3
Battery	1769-BA
Operating Temperature Range	0°C to 60°C (+32°F to +140°F)
Vibration	Operating: 10-500 Hz, 5G, 0.030 in peak-to-peak
Module Type	Control Module
Wire Type	Copper-90°C
Wire Size (Solid)	22-14 AWG
Mounting Method	DIN-rail or Panel Mounting
Enclosure Type	Open Style
Series	A and B

Dimensions and Weight

Dimensions: 8 x 8 x 5 inches
Weight: 0.69 lbs (0.31 kg)

Application and Installation

The 1769-L31 controller is optimized for industrial automation environments. Its compact design allows for flexible installation using DIN rail or panel mounting methods. It is crucial to ensure that this controller is always installed as the leftmost module in a CompactLogix system and no more than four modules from the power supply.

For wiring, use the 1756-CP3 or 1747-CP3 serial cable with a 2mm² (14-22 AWG) copper wire.