Allen-Bradley/Rockwell Automation 1771-A3B1 field wiring arm

The Allen-Bradley 1771-A3B1 is an I/O chassis for 1771 I/O modules. The 1771 PLC-5 system is a modular system that needs a 1771 I/O chassis to allow the installation of various modules. Communication between the I/O modules and either the processor module or the I/O adapter module is provided by the backplane. The 1771-A3B1 chassis has 12 I/O slots. It has dimensions of 12.4 x 19.0 x 7.6 in. and weighs 12.6 lbs. For installation in a 1771 PLC-5 system, it uses a back-panel mounting method with adequate spacing and open enclosure. The chassis backplane has a power supply of 8A at 5V DC. The 1771-A3B1 chassis has a universal configuration for chassis mounting and system design because of its own consistent design. For future expansion, it can be easily replaced with a larger chassis. It is intended for use in an industrial environment with a 0 - 60 °C (32 - 140 °F) operating temperature, 5-95 % noncondensing relative humidity, and a 30g operating shock.

The Allen-Bradley 1771-A3B1 is a universal I/O chassis that is part of the 1771 Product bulletin. This module is mainly used to provide an installation location of Programmable Logic Control (PLC) hardware such as Power Supplies, Processors, I/O modules, and specialty modules. It also provides the hinge of various wiring arms which are used to terminate signal wires for interfacing to modules.

Technical specifications for 1771-A3B1

ManufacturerRockwell Automation

Dimensions483 x 339 x 221 mm or 19.0 x 12.4 7.6 inches.

Vibration2 g (at 10-500 Hertz)

Operating Shock15 g

Enclosure TypeOpen Style

Mount TypePanel mount

Max Backplane Current (at 5 Volts DC)24 Amperes

Number of Module I/O Slots12 Slots

Module TypeI/O Chassis

Part Number/Catalog No.1771-A3B1

Weight5.9 kg or 13 lbs

BrandAllen-Bradley

Operating Temperature0 - 60 °C (32 - 140 °F)

Relative Humidity5-95% non-condensing

Nonoperating Shock30 g

LocationStand-Alone