Allen Bradley ArmorPoint 1738-IE4CM12 | 4-Channel Analog Input Module

Product Description

The Allen Bradley ArmorPoint 1738-IE4CM12 Analog Input Module is a compact, high-precision device designed for distributed I/O systems. Supporting four single-ended, non-isolated current inputs, it delivers accurate signal acquisition for industrial automation applications. With 16-bit resolution, configurable digital filtering, and robust rejection ratios, this module ensures reliable performance in demanding environments.

Technical Specifications

• Model / Part Number 1738-IE4CM12

• Manufacturer Allen Bradley (Rockwell Automation)

• Product Line ArmorPoint I/O

• Product Type Analog Input Module

• Number of Inputs 4 channels (single-ended, non-isolated)

• Input Signal Range 0–20 mA, 4–20 mA

• Accuracy ±0.1% of full scale at 25 °C

• Accuracy Drift (Current Input) 30 ppm/°C

• Input Resolution 16 bits (0–21 mA range; 0.32 µA per count)

• Input Impedance 60 Ω

• Digital Filter Time Constant Configurable 0–10,000 ms (default = 0 ms)

• Common Mode Rejection Ratio (CMRR) 120 dB

• Normal Mode Rejection Ratio (NMRR) –60 dB

• Mounting ArmorPoint distributed I/O system

Application Scenarios

• Precision current signal monitoring in distributed control systems

• Industrial automation requiring high-resolution analog inputs

• Applications needing configurable digital filtering for noise reduction

FAQ

Q: How many input channels does the 1738-IE4CM12 provide?  A: It supports 4 single-ended, non-isolated inputs.

Q: What is the resolution of the module?  A: 16-bit resolution, providing 0.32 µA per count.

Q: Does the module include digital filtering?  A: Yes, with a configurable time constant from 0–10,000 ms.

Q: What rejection ratios are supported?  A: 120 dB common mode rejection and –60 dB normal mode rejection.

Comparison with Similar Models

• 1738-IE4CM12: 4-channel analog input, 16-bit resolution, current input signals

• 1738-IE2V: 2-channel voltage input module, designed for voltage monitoring

• 1738-IE8C: 8-channel current input module, higher channel density