Industry Trends in PLC Input Modules
The demand for reliable digital input modules continues to grow as manufacturers seek to modernize legacy control systems. Programmable logic controllers remain central to factory automation, and input modules like the 1746-IA16 provide the critical interface between field devices and the controller. With Industry 4.0 initiatives pushing for greater data collection, robust AC input modules are essential for capturing real-time signals from sensors and switches.
Introducing the 1746-IA16
When engineers need a dependable AC input solution for SLC 500 platforms, the Allen-Bradley 1746-IA16 offers a proven design. This digital AC input module features sixteen channels that accept AC signals in the 85-132 Volts AC range. It occupies a single slot in the SLC 500 chassis and draws 85 milliamps from the 5 Volts DC backplane.
Technical Specifications Analysis
The 1746-IA16 delivers a signal delay of 35 milliseconds for ON state and 45 milliseconds for OFF state, ensuring timely response to input changes. Its off-state current is limited to 2 milliamps, and the maximum off-state voltage reaches 50V AC. The module uses 1746-HT and 1746-HCA I/O connection cables, and its step response is 100 milliseconds in and 2.5 milliseconds out.
Application Scenarios and Use Cases
In discrete manufacturing, the 1746-IA16 can monitor limit switches and push buttons operating on 120V AC control circuits. For material handling systems, it reliably detects presence sensors and safety interlocks. The module's 16 inputs allow efficient grouping of multiple field devices into a single slot, reducing chassis space requirements.
Compatibility and Integration
The 1746-IA16 integrates seamlessly with SLC 500 fixed and modular controllers, as well as expansion racks. It supports both local and remote I/O configurations. The removable terminal block simplifies wiring changes without disconnecting individual terminations, which reduces downtime during maintenance.
Frequently Asked Questions About the 1746-IA16
What is the operating voltage range of the 1746-IA16?
The Allen-Bradley 1746-IA16 operates with an AC input signal voltage range of 85-132 Volts AC at 47-63 Hz frequency. This covers standard 100-120V AC industrial control circuits.
How many input channels does the 1746-IA16 have?
The module provides sixteen (16) input channels, each accepting AC signals. All inputs share a common terminal arrangement, with terminals 18 and 19 serving as internally connected commons.
What is the backplane current consumption of the 1746-IA16?
The 1746-IA16 draws 85 milliamps from the 5 Volts DC backplane. It does not consume current from the 24V DC backplane supply.
Company Strength and Supply Assurance
Petro Auto Tech offers the Allen-Bradley 1746-IA16 as part of its extensive inventory of industrial automation parts. With a focus on quality and availability, Petro Auto Tech supports customers in maintaining and upgrading their SLC 500 systems. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.
