Allen-Bradley 1756-A4 4 Slot ControlLogix Chassis for Sale

Product Overview

The Allen-Bradley 1756-A4 is a 4-slot ControlLogix chassis. It provides the physical connections between modules and the backplane. This chassis supports horizontal-only mounting. It works with power supplies like 1756-PA72 and 1756-PB72. The backplane delivers high-speed communication and power distribution. It offers easy maintenance with Removal and Insertion Under Power (RIUP). Electronic keying helps prevent replacement errors. The chassis weighs 0.75 kg and measures 263 x 169 x 145 mm.

Application Scenarios

This chassis is ideal for industrial automation systems. Use it to house ControlLogix processors and I/O modules. It supports distributed I/O applications. Place modules in a remote chassis without a processor. Install a communication adapter instead. This setup reduces signal cable home runs. The chassis works in manufacturing, oil and gas, and power generation. It fits in control panels with a minimum cabinet size of 507 x 507 x 203 mm.

Technical Specifications

The 1756-A4 has four slots. It has a maximum power dissipation of 4 Watts. Power consumption is 1.8 W. Backplane current at 1.2V DC is 1.5 A per slot. At 3.3V DC, it is 4 A per slot. At 5.1V DC, it is 15 A per slot. At 24V DC, it is 2.8 A per slot. The chassis weighs 1.7 pounds. Dimensions are 10.35 x 6.65 x 5.71 inches. It requires an open enclosure. Available series include A, B, and C. Slot filler modules (1756-N2) are needed for empty slots.

Installation & Maintenance Guide

Mount the chassis horizontally on a back panel. Ensure the cabinet meets minimum size requirements. Install the power supply on the left side. Insert modules into the slots from left to right. Use slot fillers in empty slots to maintain airflow. The RIUP feature allows module replacement without powering down. Always verify electronic keying settings to avoid errors. Use only Fedex, UPS, or DHL for shipping. Keep the chassis in a dry, clean environment.

Packing List

One Allen-Bradley 1756-A4 ControlLogix Chassis. One installation manual. No power supply or modules are included. Slot filler modules are sold separately.