
Allen-Bradley 1746-IV16 SLC 500 Sourcing Input Module
Product Summary
The 1746-IV16 module provides sixteen sourcing inputs for your SLC 500 system. It accepts a nominal voltage of 24VDC. This module features a wide operating range from 10 to 30 Volts DC. Its robust design supports industrial applications with binary signaling devices.
Expert Technical Evaluation & Performance Review
The 1746-IV16 module delivers reliable performance for discrete input applications. Each channel requires a nominal input current of 8 mA at 24VDC. The module draws only 85 milliamps from the backplane. This low power consumption makes it an efficient choice for your control system.
The module offers excellent signal integrity for industrial environments. It provides optical coupling and filter circuitry for noise reduction. The maximum off-state voltage is 5 Volts DC. The maximum off-state current is 1 mA. These specifications ensure clear distinction between ON and OFF states.

Signal delay times are critical for high-speed applications. The module exhibits a maximum signal delay of 8 milliseconds. This applies to both ON to OFF and OFF to ON transitions. Such performance supports reliable data acquisition from sensors and switches.
The module operates within a temperature range of 0 to 60 degrees Celsius. It also handles relative humidity from 5 to 95 percent noncondensing. These environmental tolerances make it suitable for demanding factory floor conditions.
Each channel group uses a sourcing wiring configuration. The module provides the signal voltage to the input loop. This design supports devices that do not carry their own signal voltage. It simplifies wiring for many common industrial sensors.
Maintenance, Troubleshooting & Longevity Protocols

The 1746-IV16 module simplifies maintenance with its removable terminal block. You do not need to disconnect any wires for module replacement. This feature significantly reduces downtime during a malfunction.
The module includes 16 LED status indicators for each channel. These LEDs show the current input state at a glance. This visual feedback makes troubleshooting much faster for technicians.
The module stores digitally-converted data in its image table. SLC 500 processors access this data using Ladder Logic programming. This integration simplifies your control logic development.
The module uses a sharing-based hardware platform with other I/O modules. This design saves both cost and valuable chassis space. You can combine digital and analog modules in the same rack.

Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-IV16 discrete input module
- One (1) removable terminal block pre-installed
- Product documentation and installation guide
- Express shipping available via FedEx, UPS, and DHL