Allen-Bradley 1771-IM Digital AC/DC Input Module

Product Overview

The 1771-IM digital input module comes from Allen-Bradley. It is part of the PLC-5 series. This module provides eight inputs for AC or DC signals. The voltage category is 220 Volts AC/DC. The AC operating voltage ranges from 184 to 276 Volts. The DC operating voltage also ranges from 184 to 276 Volts. The backplane current draw is 75 mA. The module has a maximum off-state current of 1.0 mA for both AC and DC. The typical AC signal delay for turning on is 20 ms with a tolerance of ±6 ms. The DC on delay is 10 ms ±4 ms. The off delays are 20 ms ±6 ms for AC and 20 ms ±9 ms for DC. The module works with selector switches, pushbutton switches, AC limit switches, and float switches.

Application Scenarios

You can use the 1771-IM in many industrial control systems. It receives signals from pushbutton stations and selector switches. It also works with AC limit switches and float switches. Typical applications include conveyor belt control, machine tool monitoring, and process automation. The module fits into a 1771 I/O chassis. It operates in temperatures from 32°F to 140°F. The humidity range is 5% to 95% non-condensing.

Technical Specifications

Detailed specifications of the 1771-IM module are as follows:

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Part Number: 1771-IM
• Module Type: Digital AC/DC Input Module
• Number of Inputs: 8
• Voltage Category: 220 Volts AC/DC
• AC Operating Voltage: 184-276 Volts
• DC Operating Voltage: 184-276 Volts
• Nominal Input Current at 240V DC: 2.6 mA
• Nominal Input Current at 220V AC 50Hz: 3 mA
• Nominal Input Current at 220V AC 60Hz: 3.5 mA
• Minimum On-State Current: 2.9 mA
• Maximum Off-State Current: 1.0 mA
• Maximum Off-State Voltage: 92-114V AC
• Backplane Current: 75 mA
• Typical AC Signal Delay (On): 20 ±6 ms
• Typical DC Signal Delay (On): 10 ±4 ms
• Typical AC Signal Delay (Off): 20 ±6 ms
• Typical DC Signal Delay (Off): 20 ±9 ms
• Wiring Arm: 1771-WA
• Mounting: Rack Mountable
• Power Dissipation: Minimum 0.4 W, Maximum 2.4 W
• Thermal Dissipation: Minimum 3.2 BTU/hr, Maximum 10.9 BTU/hr
• Operating Temperature: 32 to 140 °F (0 to 60 °C)
• Relative Humidity: 5-95% Non-Condensing

Installation & Maintenance Guide

Install the 1771-IM module in any slot of a 1771 series I/O rack. Use the 1771-WA wiring arm for connecting field wiring. Always turn off power before inserting or removing the module. The module is keyed to prevent incorrect installation. No special maintenance is needed. Keep the module clean and dry. The module meets standard industrial environmental requirements.

Packing List

The package includes one Allen-Bradley 1771-IM digital input module. It also includes mounting instructions and documentation. We ship via FedEx, UPS, or DHL. The module comes in anti-static packaging.