Allen-Bradley 1738-IE4CM12 ArmorPoint 4-Point Analog Current Input Module

Allen-Bradley 1738-IE4CM12 ArmorPoint 4-Point Analog Current Input Module

The Allen-Bradley 1738-IE4CM12 is a rugged ArmorPoint analog current input module engineered for demanding industrial automation applications. This compact I/O solution delivers precise 4-20 mA and 0-20 mA signal acquisition in harsh environments where traditional control systems cannot operate reliably.

Technical Specifications

• Input Channels: 4 single-ended, non-isolated analog current inputs
• Current Range: 4-20 mA / 0-20 mA selectable per channel
• Resolution: 16-bit for superior measurement accuracy
• Update Rate: Configurable from 10ms to 10 seconds
• Input Impedance: Approximately 250 ohms
• Operating Temperature: -40°C to 70°C (-40°F to 158°F)
• Enclosure Rating: IP67 for dust-tight and water-resistant protection
• Power Consumption: 24V DC, typical 1.5W
• Mounting: DIN rail or panel mount options
• Certifications: UL, cUL, CE, ATEX Zone 2 compliant

Application Scenarios

The 1738-IE4CM12 excels in process monitoring and control applications across multiple industries:

• Oil & Gas: Tank level monitoring, pressure transmitter interfacing, flow measurement in hazardous locations
• Water Treatment: pH sensor integration, chemical dosing control, turbidity measurement
• Manufacturing: Temperature monitoring via 4-20mA transmitters, conveyor speed control, quality control systems
• Food & Beverage: Ingredient flow control, pasteurization monitoring, clean-in-place (CIP) system integration
• Mining: Vibration monitoring, dust collection systems, material handling automation

System Integration & Solutions

This module seamlessly integrates with Allen-Bradley ArmorPoint distributed I/O systems via DeviceNet or EtherNet/IP networks. The hot-swappable design enables maintenance without system shutdown, while built-in diagnostics provide real-time health monitoring. Configuration is simplified through RSLogix software with automatic device recognition and pre-built function blocks.

Pair with Allen-Bradley 1738-IB8M8 Digital Input Module for complete mixed-signal I/O solutions, or combine with Allen-Bradley 1756-IF16 Analog Input Module for ControlLogix platform expansion.

Common Questions & Answers

Q: Can this module handle HART protocol signals?
A: No, the 1738-IE4CM12 processes standard 4-20mA analog signals only. For HART communication, consider the 1756-IF16H module.

Q: What's the maximum cable distance from transmitter to module?
A: Up to 1000 meters (3280 feet) with proper shielded cable and grounding practices.

Q: Is channel-to-channel isolation provided?
A: No, inputs are non-isolated but share a common ground reference. For isolated inputs, specify the 1738-IE4CM12ISO variant.

Q: How do I configure the current range per channel?
A: Configuration is performed via RSLogix software, allowing independent 4-20mA or 0-20mA selection for each of the four channels.

Q: Does it support loop-powered transmitters?
A: No, external power must be supplied to transmitters. The module provides only signal measurement, not loop power.

Warranty & Support

Every 1738-IE4CM12 module includes a comprehensive 12-month manufacturer warranty covering defects in materials and workmanship. Technical support and firmware updates are available throughout the product lifecycle. Our team provides application engineering assistance for system design and troubleshooting.

Why Choose This Module?

The ArmorPoint 1738-IE4CM12 combines industrial-grade reliability with flexible deployment options. Its IP67 rating eliminates the need for expensive control cabinets in many applications, reducing installation costs by up to 40%. The compact form factor and hot-swap capability minimize downtime during maintenance, while 16-bit resolution ensures measurement precision for critical process control.

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