Allen Bradley 1771-IVN Low True Input Module

Product Introduction

The Allen-Bradley 1771-IVN Low True Input Module is a digital DC input module designed for the PLC-5 based 1771 I/O platform from Allen-Bradley. It is used to monitor discrete signals from field devices and transmit the signal status to the PLC processor for automation control and system monitoring.

The module provides 32 input points and operates with a 10–30 VDC signal range. It uses low-true logic, meaning the input is considered active when the signal is at a low voltage level. This logic configuration is useful in control systems where devices switch to ground to indicate an active state.

Installed in a standard 1771 I/O chassis, the 1771-IVN communicates directly with the PLC-5 processor through the backplane. Its high channel density and reliable signal detection make it suitable for manufacturing automation, machine control panels, and industrial monitoring systems that require efficient management of multiple DC input signals.

Product Specifications

Applications

● Industrial PLC-5 Control Systems
Used to detect low-true DC signals from sensors and switches and transmit them to the PLC for processing.

● Manufacturing Automation Equipment
Allows monitoring of multiple input devices in production lines and automated machinery.

● Machine Control Panels
Captures signal states from field devices used in machine safety and operational monitoring.

● Process Monitoring Systems
Collects discrete signals from industrial equipment to ensure stable and controlled operation.

● Large-Scale Digital Signal Monitoring
Supports systems that require monitoring of many DC input signals within a compact module.

Advantages

● High Input Density
Provides 32 input channels in a single module, improving system efficiency.

● Low-True Logic Compatibility
Ideal for systems where devices activate by switching signals to ground.

● Stable Signal Detection
Ensures reliable monitoring of discrete DC signals in industrial environments.

● Efficient PLC Integration
Communicates directly with PLC-5 controllers through the 1771 backplane.

● Compact Modular Design
Installs easily in a standard 1771 I/O chassis slot.

● Reliable Industrial Performance
Designed for long-term operation in automation and process control systems.

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