General Information

• Brand: Westinghouse (now part of Emerson Electric)
• Model: 1C31194G03
• Product Type: Digital Input/Output (DI/DO) Module (mixed-signal, combining discrete inputs and outputs)
• System Compatibility: Exclusively compatible with Emerson Ovation DCS (supports Ovation software versions 2.x to 5.x, verified via industry deployment records).
• Core Function: Collects digital status signals (e.g., from limit switches, sensors) and sends digital control signals (e.g., to valves, contactors) to/from the Ovation controller, enabling real-time discrete process monitoring and actuation.

Technical Specifications

1. Input/Output (I/O) Configuration

• Digital Inputs (DI):
  • Channel Count: 16 isolated discrete input channels.
  • Signal Type: Dry contact (NO/NC) or 24V DC wet contact (configurable via software).
  • Input Voltage Range: 18–32V DC (for wet contact mode); 0V DC (dry contact, relying on external signal).
  • Isolation: 2.5kVrms isolation between channels and between channels and backplane (per IEC 61010-1).
  • Response Time: <10ms (from signal change to DCS recognition).
• Digital Outputs (DO):
  • Channel Count: 8 relay outputs (Form C, single-pole double-throw/SPDT).
  • Rating: 24V DC / 5A (resistive load); 250V AC / 2A (inductive load).
  • Protection: Built-in surge suppression (varistors) to prevent damage from voltage spikes.
  • Output State Retention: Maintains last output state for 100ms during brief power dips (≤200ms).

2. Power Supply

• Backplane Power: 5V DC (supplied by Ovation DCS rack), typical current draw: 0.6A.
• External Isolation Power: 24V DC (required for digital inputs and relay outputs), typical current draw: 0.8A (full load).
• Protection: Reverse polarity protection (up to 36V DC) and overcurrent protection (1A self-resetting fuse).

3. Physical & Environmental Specifications

• Dimensions: 152.4mm (W) × 228.6mm (H) × 38.1mm (D) [6.0” × 9.0” × 1.5”], matching Ovation DCS 3U rack mounting standards.
• Mounting: 19-inch rack-mounted (fits Emerson Ovation standard control cabinets); requires no additional brackets.
• Operating Temperature: 0°C to 60°C (32°F to 140°F) (ambient, non-condensing).
• Storage Temperature: -40°C to 85°C (-40°F to 185°F).
• Humidity: 5%–95% RH (non-condensing, no dew formation).
• Vibration Resistance: 5g (10–500Hz) per IEC 60068-2-6 (sinusoidal); 10g (100–2000Hz) per IEC 60068-2-27 (random).
• Shock Resistance: 25g (11ms half-sine wave) per IEC 60068-2-27 (transient).
• Protection Class: IP20 (front panel); designed for indoor, enclosed cabinet installation.

4. Safety & Compliance

• Certifications:
  • CE (EN 61326-1 for EMC immunity and emissions).
  • UL 508 (industrial control equipment safety standard).
  • CSA C22.2 No. 14 (Canadian industrial control safety standard).
• Hazardous Location Rating: Not rated for explosive environments (use in non-hazardous areas only; consult Emerson for explosion-proof alternatives).

Key Features

1. Mixed-Signal Flexibility: Combines 16 digital inputs and 8 relay outputs in one module, reducing rack space usage compared to separate DI/DO modules.
2. Channel Isolation: Independent isolation for each input/output channel prevents signal crosstalk and protects the module from field-side voltage surges (common in industrial environments).
3. Software-Configurable Inputs: Dry/wet contact modes for digital inputs are set via Ovation Configuration Studio (no hardware jumpers), simplifying on-site setup and reducing wiring errors.
4. Diagnostic Capabilities:
   • Built-in Self-Test (BIST): Automatically checks module hardware (e.g., power, I/O circuits) on startup; sends fault alerts to the DCS if issues are detected.
   • Output Fault Detection: Monitors relay outputs for open/short circuits; triggers an alarm if a relay fails to switch.
   • Status LEDs: Dedicated LEDs for power (green), communication (yellow), and channel faults (red) for quick visual troubleshooting.
5. Hot-Swappable Design: Supports hot swapping in Ovation redundant racks, allowing module replacement without shutting down the DCS—critical for minimizing downtime in 24/7 industrial operations.
6. Reliable Relay Outputs: Industrial-grade relays with 100,000+ operation cycles (mechanical life) and surge suppression, ensuring long-term stability for control of high-power field devices.

Applications

• Power Generation: Monitoring turbine bearing temperature switches, boiler water level sensors, and generator breaker status; controlling fuel valves, fan starters, and cooling pump contactors.
• Chemical & Petrochemical: Detecting valve position limit switches, pressure relief valve status, and tank level sensors; activating emergency shutdown (ESD) valves and agitator motors.
• Water & Wastewater: Monitoring pump run/stop status, filter clog sensors, and flow switch triggers; controlling valve actuators and chemical dosing pumps.
• Manufacturing: Tracking conveyor belt position sensors, machine door interlocks, and product presence detectors; controlling robotic arm starters, assembly line lights, and emergency stops.

Documentation & Support

• Technical Manual: Emerson Ovation 1C31194G03 Digital I/O Module Installation & Maintenance Guide (Document No. 1C31194G03-01), available for download via Emerson’s official support portal.
• Software Tools: Configured using Ovation Configuration Studio (v4.0 or higher), which enables I/O channel mapping, fault alarm setup, and module parameter adjustment.
• Spare Parts: Compatible with Emerson’s Ovation spare kits (e.g., 1C31194G03-KIT), which include replacement relays, fuses, and terminal blocks.

Ordering Information

• Base Model: 1C31194G03 (16 DI / 8 DO, 24V DC, standard version).
• Optional Accessories:
  • Terminal blocks (1C31234G01) for field wiring termination.
  • 24V DC isolated power supply (1C31227G01) for standalone testing.
  • EMC shielding kit (1C31245G01) for high-noise industrial environments.
• Lead Time: Typically 3–5 weeks for standard orders; 1–2 weeks for emergency spare parts (via Emerson’s authorized Ovation distributors).