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Compact grey PLC module with terminal blocks and multiple ports

Allen-Bradley

Allen-Bradley Micrologix 1400 PLC Module 1766-L32BXB 20 digital inputs 12 outputs 24V DC

SKU CH-YH12-9CG4E

Programmable logic controller with 20 digital inputs and 12 mixed relay and DC outputs, powered at 24 V DC

  • TypeOther
  • 20 digital inputs for flexible machine sensing
  • 12 mixed outputs including 6 relay channels
  • 24 V DC power simplifies cabinet wiring
  • RS-232/RS-485 plus Ethernet/IP for integration
  • Factory sealed unit with firmware revision 21

Allen-Bradley 1766-L32BXB Micrologix 1400 PLC

The Allen-Bradley 1766-L32BXB Micrologix 1400 is a programmable logic controller module with 20 digital inputs and 12 outputs operating on 24V DC power. It suits automation engineers building compact machine control systems. Buyers needing analog I/O or higher density discrete channels should consider other platforms.

Installation notes for 1766-L32BXB

The module mounts on a DIN rail and connects via removable terminal blocks for the 24V DC supply, inputs and relay or transistor outputs. Communication uses a 9-pin D-shell, an 8-pin mini DIN and an RJ-45 Ethernet/IP port. Wiring errors on the mixed relay and fast transistor outputs are the most common commissioning issue.

Ethernet/IP and serial limits

The Ethernet/IP port provides a single RJ-45 connection at standard industrial Ethernet rates while the serial ports support RS-232C and RS-485 on the 9-pin and 8-pin connectors respectively. Bandwidth and node count are constrained by the Micrologix 1400 processor capacity. Applications requiring multiple Ethernet ports or gigabit speeds need a different controller.

Highlights

  • 20 digital inputs for flexible machine sensing
  • 12 mixed outputs including 6 relay channels
  • 24 V DC power simplifies cabinet wiring
  • RS-232/RS-485 plus Ethernet/IP for integration
  • Factory sealed unit with firmware revision 21

Specifications

TypeOther

Questions about this item

How do I verify the 1766-L32BXB is running correctly after wiring the 20 digital inputs and 12 outputs?

Apply 24V DC power, confirm the status LEDs show normal operation, then connect via the Ethernet/IP RJ-45 or RS-232C/RS-485 ports to monitor input/output states in your programming software.

What comes in the factory-sealed box for the 1766-L32BXB and what must I purchase separately?

The sealed box contains the Micrologix 1400 controller with 20 digital inputs and 12 outputs; you must source 24V DC power supply, field wiring, communication cables and programming software separately.

Which firmware version should I expect on the 1766-L32BXB and does the series letter matter for my application?

The unit ships with firmware 21 and series C hardware; match these to your project requirements and programming environment before commissioning.

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