1756-IR12 | Allen Bradley ControlLogix | 12-Channel RTD Analog Input Module

Product Description

The Allen Bradley 1756-IR12 is a ControlLogix I/O module designed for precise analog input measurement using 3-wire RTD sensors. With 12 non-isolated channels and 24-bit resolution, it provides high accuracy for temperature monitoring and resistance measurement applications. This module is engineered for general-purpose I/O tasks within ControlLogix systems, offering robust performance and reliable integration.

Technical Specifications

• Manufacturer: Allen Bradley

• Product Line: ControlLogix

• Category: PLC I/O Modules

• Model / Part Number: 1756-IR12

• Weight: 0.75 lbs (0.34 kg)

• Application: General-purpose analog input

• Module Type: RTD analog input, 3-wire connections

• Number of Channels: 12, non-isolated

• Data Resolution: 24-bit

• Mounting: Chassis-based installation

• Status Display: LED indicators

• Input Range Options:

• 1–500 Ohms

• 2–1000 Ohms

• 4–2000 Ohms

• 8–4000 Ohms

• Isolation Voltage: 250 V continuous

• Current Draw:

• 200 mA @ 5.1 VDC

• 150 mA @ 24 VDC

• Operating Temperature: 0–60 °C (32–140 °F)

Application Scenarios

The 1756-IR12 is widely used in process industries requiring accurate RTD-based temperature measurement, such as chemical plants, food processing, and energy systems. Its multiple input ranges make it adaptable for different sensor types and measurement requirements.

FAQ

Q: How many channels does the module provide?  A: It supports 12 non-isolated RTD input channels.

Q: What resolution is available for input data?  A: The module offers 24-bit resolution, ensuring precise measurement.

Q: Can this module be used for resistance measurement?  A: Yes, it supports multiple input ranges up to 4000 Ohms, making it suitable for resistance-based sensing.