Allen-Bradley A 1771-A1, A 1771-A2, A 1771-A3, A 1771-A4, B 1771-A1B, B 1771-A2B, B 1771-A3B, B 1771-A3B1, B 1771-A4B, 1771-P1, 1771-P2, 1771-P7, 1771-PS7, L 1772-LSP, L 1772-LWP, L 1772-LXP, L 1772-LZP Installation Instructions

Below you will find brief information for Universal I/O Chassis B 1771-A1B, Universal I/O Chassis B 1771-A2B, Universal I/O Chassis B 1771-A3B, Universal I/O Chassis B 1771-A3B1, Universal I/O Chassis B 1771-A4B. This document provides detailed instructions on how to install and configure the Universal I/O Chassis, including steps on preparing for installation, mounting the chassis, grounding the chassis, and setting the power supply configuration jumper. This document also discusses important safety considerations for operating this equipment in hazardous locations.

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Universal I/O Chassis B 1771-A1B, B 1771-A2B, B 1771-A3B Installation Instructions | Manualzz

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Key features

  • Mount to Panel or Rack
  • Accepts I/O Modules
  • Grouding
  • Power Supply Configuration
  • Hazardous Location Compatibility
  • Module Installation
  • Backplane Connectors
  • Locking Bar
  • I/O Group Labels

Frequently asked questions

The maximum backplane current at 5Vdc for the 1771-A1B chassis is 16A.

The I/O chassis has grounding studs located on the side plate. Use a star washer under the first lug, then place a nut with a captive lock washer on top of each ground lug. Torque the nut to 18 (+3) pound-inches.

Set the jumper to the "Y" position if you are using a power supply module or a processor with an integral power supply. Set the jumper to the "N" position if you are using a power supply external to the I/O chassis.

No, you cannot connect an external power supply and a power supply module to the same I/O chassis. They are incompatible.

The operating temperature range is 32 to 140°F (0 to 60°C), the storage temperature range is -40 to 185°F (-40 to 85°C), and the relative humidity range is 5 to 95%, noncondensing.
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