1C31177G03 | Emerson Ovation | Remote Shielded Loop Interface Module

Product Summary

The Emerson Ovation 1C31177G03 is a mA Remote Shielded Loop Interface Module for the Emerson Ovation DCS. It provides 4 channels of 4-20mA analog input/output with remote-powered operation and shielded loop design, enabling reliable current loop communication with field devices over longer distances while minimizing electrical noise interference.

Core Specifications

• Model Number: 1C31177G03
• Type: mA Remote Shielded Loop Interface
• Channels: 4 (AI/AO configurable)
• Input Range: 4–20 mA (per official manual); -40 to +40 mA (per some suppliers)
• Output Range: 4–20 mA (per official manual); -40 to +40 mA (per some suppliers)
• Power Supply: Remote powered (field-side loop power)
• Shielding: Shielded loop design for noise immunity
• Resolution: 16-bit (typical)
• Accuracy: ±0.1% of full scale
• Isolation: Channel-to-channel and channel-to-system
• Mounting: Rack mount
• Manufacturer: Emerson (formerly Westinghouse)

Key Features

• Remote-powered design eliminates need for local excitation power
• Shielded loop architecture minimizes EMI/RFI interference
• 4-channel bidirectional AI/AO for flexible loop configuration
• High accuracy ±0.1% for precise process control
• Galvanic isolation protects against ground loops

Environmental Limits

• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Humidity: 0% to 95% RH, non-condensing

Frequently Asked Questions

What is the 1C31177G03 used for?

It is a 4-channel mA remote shielded loop interface for Emerson Ovation DCS, providing isolated 4-20mA analog input/output with field-side loop power and shielded noise immunity.

What does "remote powered" mean?

The module draws excitation power from the field current loop rather than supplying it from the controller, making it ideal for applications where centralized power distribution is preferred.

What is the difference between 1C31177G02 and 1C31177G03?

The 1C31177G02 is the mA Local Shielded Loop Interface (system-powered). The 1C31177G03 is the mA Remote Shielded Loop Interface (field-powered).

What is the difference between 1C31177G01 and 1C31177G03?

The 1C31177G01 is the Voltage AO Loop Interface (voltage output). The 1C31177G03 is the mA Remote Shielded Loop Interface (current loop).

Installation Guide

Safety Precautions

• De-energize the Ovation rack before installation
• Use proper ESD protection when handling the module
• Verify shield grounding configuration for noise immunity

Step-by-Step Procedure

1. Power down the Ovation I/O rack
2. Align the module with the rack slot and insert firmly
3. Secure the module retaining clips
4. Connect shielded 4-20mA field wiring to the terminal base unit
5. Ensure proper shield grounding at one end only
6. Power up and verify module status LEDs

Selection Tips

• Use 1C31177G03 for field-powered (remote) loop applications
• Use 1C31177G02 for system-powered (local) loop applications
• Ensure shielded cable is used for full noise immunity benefit
• Verify loop resistance is compatible with remote power design

Related Part Numbers

• 1C31177G01 — Voltage AO Loop Interface
• 1C31177G02 — mA Local Shielded Loop Interface
• 1C31177G03 — mA Remote Shielded Loop Interface (this part)
• 1C31174G03 — 0-20mA Loop Interface
• 1C31174G04 — 0-5V Electric Drive Loop Interface