Allen-Bradley 1771-IH Digital DC Input Module 8 Channels

Product Overview

The Allen-Bradley 1771-IH is a digital DC input module. It provides 8 input channels. This module works with PLC-5 and Bulletin 1771 systems. It uses a DC operating voltage range of 24 to 48 Volts. The module mounts in a rack for easy installation. It includes a wiring arm for simple connections. Eight red status indicators show input states. This module has a backplane current of 74 mA. Its isolation voltage is 1500V AC RMS. Power dissipation ranges from 0.4 W to 8.1 W. Thermal dissipation ranges from 1.3 to 27.7 BTU/hr. The operating temperature range is 0 to 60 degrees Celsius.

Application Scenarios

This module suits industrial automation tasks. It connects sensors and switches to a control system. Use it in manufacturing plants. It works in material handling systems. It fits in process control environments. The module handles DC signals from various devices. It offers reliable signal detection. It is ideal for harsh industrial settings.

Technical Specifications

Electrical Characteristics

Voltage category: 10-60 Volts DC sink (source load). Operating voltage: 24-50 Volts DC. Input current: 8.4 mA at 24V DC, 20 mA at 48V DC. Maximum on-state voltage: 10V DC. Maximum off-state voltage: 4.5V DC. Maximum off-state current: 1 mA. Input impedance: 2.5-3 kΩ on-state, 5-6 kΩ off-state.

Signal Delays

Typical DC signal delay (on): 15 ms (±7 ms). Typical DC signal delay (off): 20 ms (±9 ms). Typical AC signal delay (off): 24 ms (±10 ms).

Mechanical Specifications

Mounting: rack mountable. Wiring arm: 1771-WD. Module type: digital DC input. Number of inputs: 8.

Installation & Maintenance Guide

Install the 1771-IH module into a compatible rack. Ensure power is off before insertion. Connect wiring using the 1771-WD wiring arm. Use appropriate DC voltage sources. Follow module status indicators for troubleshooting. Keep the module free from dust and moisture. Replace the module if it fails to operate correctly.

Packing List

1 x Allen-Bradley 1771-IH input module. 1 x Wiring arm 1771-WD. Documentation may be included.