Allen-Bradley 1772-LN2 mini-PLC-2 programmable controller

The Allen-Bradley 1772-LN2 is a Mini-PLC-2 programmable controller designed for compact industrial automation applications requiring reliable machine and process control. The controller supports up to 32 I/O points and features a built-in memory structure that enables efficient execution of user-defined control programs.

The 1772-LN2 operates with a digital input voltage range of 10–32V DC and does not require an external power source. It is equipped with 40 terminals and uses the 1771-WN wiring arm for simplified installation and maintenance. The controller includes conformal coating protection, enhancing reliability in harsh industrial environments exposed to dust, moisture, and contaminants.

This controller provides a memory size of 1024 words organized into user program memory, data table memory, and message storage. It features Read/Write CMOS memory for storing program instructions, I/O status information, and numeric data values. The 1772-LN2 supports various PLC functions including arithmetic operations, timing and counting, data comparisons, I/O forcing, RS-232-C interfacing, and Data Highway communication.

Widely used in process control, pollution monitoring, material handling, palletizing, and measurement systems, the 1772-LN2 delivers dependable automation control for legacy Allen-Bradley PLC installations.

Manufacturer

Allen Bradley

Category

PLCs

Product Line

PLC 5

Number of Terminals

40 Terminals

Max Fuse Size

N/A

Contact Plating

Tin

Screw Torque

7-9 lb*in

Typical Application

10-32 Volts DC, Digital

Coating

Conformal Coat

Required External Power

None

Typical AC Signal Delay (Off)

29 (+/- 8) ms

Typical DC Signal Delay (Off)

30 (+/- 7) ms

Wiring Arm

1771-WN

Mini-PLC-2 Controller

Compact programmable controller for industrial automation

32 I/O Capacity

Supports up to 32 input/output points

CMOS Memory

Read/Write memory for program and data storage

1024-Word Memory

Organized into user program and data storage areas

Wide DC Voltage Range

Operates on 10–32V DC digital signals

Conformal Coating

Enhanced protection against industrial contaminants

Fast Signal Response

Typical signal delay of approximately 30 ms

Communication Support

Supports RS-232-C and Data Highway interfacing

Multiple PLC Functions

Includes timing, counting, arithmetic, and comparison functions

Industrial Application Flexibility

Suitable for process control and material handling systems

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