Emerson 1C31238H01

Product Description:
The 1C31238H01 is an 8-channel analog input module designed for the Ovation DCS platform. It accepts 4–20 mA current loop signals from field transmitters and converts them into digital values for process control. The module supports HART communication protocol for smart transmitter diagnostics and configuration.

Category:
Description

Technical Specifications:

Parameter Value
Channels 8 single-ended / 4 differential
Input Signal 4–20 mA, 2-wire
Resolution 16-bit A/D converter
Sampling Rate 100 ms per channel (configurable)
Isolation 500 VDC channel-to-channel, 500 VDC channel-to-backplane
HART Protocol HART 5 / HART 7 compliant
Power Consumption 5.0 W typical
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 5% to 95% non-condensing
Dimensions (W×H×D) 28.6 mm × 120 mm × 150 mm
Weight 0.28 kg
Certifications CE, FM, CSA, ATEX Zone 2 (optional)

Functional Features:

  • HART Pass-Through: Enables bidirectional HART communication without interrupting the 4–20 mA signal
  • Channel Diagnostics: Per-channel fault detection including open circuit, short circuit, and out-of-range alarms
  • Cold Junction Compensation: Built-in for thermocouple compatibility when used with appropriate front-end modules
  • Programmable Input Range: Software-configurable via Ovation Explorer
  • Redundant Power Supply: Supports dual-redundant backplane power

Structural Features:

  • Form Factor: Standard Ovation I/O card, plug-in module
  • Connector: 50-pin Eurocard connector, backplane interface
  • Front Panel: LED status indicators per channel (OK, Fault, Active)
  • Terminal Block: Removable screw-type terminal block for field wiring
  • Mounting: DIN rail or chassis mount within Ovation I/O rack

Applicable Industries:

  • Oil & Gas (upstream, midstream, downstream)
  • Chemical & Petrochemical Processing
  • Power Generation (fossil, nuclear, renewable)
  • Pulp & Paper
  • Water & Wastewater Treatment
  • Mining & Minerals Processing

Installation Requirements:

  • Install in Ovation I/O chassis with proper backplane connection
  • Maintain minimum 25 mm clearance above and below for airflow
  • Use shielded twisted-pair cable for field wiring
  • Ground shield at control room end only
  • Ensure isolation barrier is installed if connecting to non-isolated field devices

Usage Precautions:

  • Do not exceed 30 VDC across any input channel
  • Verify loop power supply is within 12–36 VDC range
  • Do not hot-swap modules unless system is configured for hot-swap operation
  • Perform HART calibration using Emerson AMS Suite or compatible tool
  • Replace terminal blocks if torque exceeds 0.8 N·m
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