Emerson 1C31122G02

Manufacturer: Emerson Electric (Emerson Process Management)

Product Overview:
The Emerson 1C31122G02 is a 16-channel discrete input module used in the Emerson DeltaV distributed control system (DCS). It accepts dry contact or 24 V DC signals from field devices and provides galvanic isolation for each channel.

Model Series: DeltaV I/O — Series 2 (1C31 Series)

Category:
Description

Technical Specifications:

  • Channel Count: 16 discrete inputs
  • Input Type: Dry contact (dry circuit) or 24 V DC
  • Input Voltage: 24 V DC (nominal for DC mode)
  • Isolation Voltage: 250 V DC per channel (galvanic isolation)
  • Input Current: 5 mA (typical, DC mode)
  • Response Time: < 10 ms
  • Communication: H1 (Highway) bus, 31.25 kbps
  • Power Consumption: 2.5 W (typical)
  • Operating Temperature: 0 °C to +60 °C
  • Enclosure Rating: IP20
  • Dimensions: Approx. 140 mm × 120 mm × 25 mm

Functional Features:

  • 16 independent discrete input channels
  • Galvanic isolation on each channel
  • Dry contact or 24 V DC input selectable per channel (via configuration)
  • LED indicators per channel for status monitoring
  • Hot-swap capable (module can be replaced without system shutdown)
  • Fail-safe configuration (inputs can be set as normally open or normally closed)
  • Diagnostic capabilities via DeltaV system

Structural Features:

  • Plastic housing with metal mounting bracket
  • Terminal block connections (screw-type)
  • 16 LED status indicators
  • H1 bus connector at top

Material Composition:

  • Housing: Polycarbonate (UL 94 V-0)
  • Terminal blocks: Copper alloy, tin-plated
  • PCB: FR-4, conformal coated
  • Isolation: Opto-isolators per channel

Applicable Industries:

  • Oil and gas refining
  • Chemical processing
  • Power generation
  • Water/wastewater treatment
  • Pharmaceutical manufacturing

Installation Requirements:

  • Mount in DeltaV I/O card cage (Series 2 chassis)
  • Connect to H1 bus via backplane
  • Wire field devices to terminal blocks (max 1.5 mm² wire)
  • Ensure proper grounding of I/O cabinet

Usage Notes:

  • Configure input type (dry contact vs. 24 V DC) in DeltaV configuration software
  • Set fail-safe state (NO/NC) per channel based on safety requirements
  • Do not exceed 24 V DC on any input channel
  • Verify LED status matches field device state during commissioning
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