The Westinghouse 1C31224G01 (now under Emerson Electric) is a 16-channel Analog Input (AI) Module engineered exclusively for the Emerson Ovation Distributed Control System (DCS). It specializes in high-precision acquisition of continuous analog signals from industrial field devices (e.g., pressure transmitters, temperature sensors) and transmits digitized data to the Ovation controller for real-time monitoring and process control. Below is its detailed technical overview, consolidated from Emerson’s official documentation and verified industry deployments:
- Brand: Westinghouse (Emerson Electric)
- Model: 1C31224G01
- Product Type: 16-Channel Analog Input (AI) Module
- System Compatibility: Designed for Emerson Ovation DCS (supports Ovation software versions 3.x to 6.x), compatible with Ovation standard racks and terminal bases (e.g., 1C31223G01).
- Core Function: Converts analog signals (voltage, current, thermocouple, RTD) from field sensors into digital data readable by the Ovation DCS, enabling accurate measurement of process variables in industrial environments.
- Channel Count: 16 independent differential input channels (isolated between channels to eliminate cross-interference).
- Supported Signal Types: Configurable per channel via Ovation Configuration Studio (no hardware jumpers):
- Current: 4–20 mA DC (two-wire/four-wire sensor compatible), 0–20 mA DC.
- Voltage: ±5 V DC, ±10 V DC, 0–5 V DC, 0–10 V DC.
- Thermocouple: Type J, K, T, E, R, S, B (with cold-junction compensation).
- RTD: Pt100 (3-wire, 100 Ω at 0°C), Cu100 (3-wire, 100 Ω at 0°C).
- Input Resolution: 16-bit ADC (analog-to-digital converter) – ensures high measurement precision for critical processes.
- Input Impedance: ≥10 MΩ (for voltage signals); ≤100 Ω (for current signals) – minimizes signal loss.
- Measurement Accuracy (at 25°C / 77°F, ±0.1% of full scale (FS) unless specified):
- Current (4–20 mA): ±0.05% FS.
- Voltage (±10 V): ±0.05% FS.
- Thermocouple (Type K): ±0.2°C (range: -100°C to +1250°C).
- RTD (Pt100): ±0.1°C (range: -200°C to +600°C).
- Common-Mode Rejection Ratio (CMRR): ≥80 dB (at 50/60 Hz) – suppresses electrical noise from industrial power lines.
- Power Supply:
- Backplane power: 5 V DC (supplied by Ovation rack), typical current draw: 0.7 A.
- Isolation power: 24 V DC (external, for signal isolation), typical current draw: 0.4 A.
- Isolation: 2.5 kVrms between channels, between channels and backplane, and between channels and power supply (per IEC 61010-1) – protects the module from field-side voltage spikes.
- Dimensions: 152.4 mm (W) × 228.6 mm (H) × 38.1 mm (D) [6.0” × 9.0” × 1.5”] – matches Ovation 3U rack standards.
- Mounting: 19-inch rack-mounted, requires pairing with Ovation terminal base (1C31223G01) for field wiring termination.
- 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: 5 g (10–500 Hz) per IEC 60068-2-6 (sinusoidal); 10 g (100–2000 Hz) per IEC 60068-2-27 (random).
- Shock Resistance: 25 g (11 ms half-sine wave) per IEC 60068-2-27 (transient).
- Protection Class: IP20 (front panel) – designed for indoor, enclosed control cabinets.
- Certifications:
- CE (EN 61326-1 for EMC immunity and emissions) – no interference with other DCS components.
- UL 508 (industrial control equipment safety standard) – compliant for North American markets.
- CSA C22.2 No. 14 (Canadian safety standard) – meets Canadian electrical safety requirements.
- Hazardous Location Rating: Not rated for explosive environments (use in non-hazardous areas only; consult Emerson for explosion-proof alternatives).
- High Precision & Stability: 16-bit ADC and low-drift components ensure long-term measurement accuracy (drift <0.01% FS/year), critical for processes like chemical reaction control or power plant steam pressure monitoring.
- Flexible Signal Configuration: Each channel can be independently set to different signal types via software, eliminating the need for multiple dedicated modules and reducing rack space usage.
- Built-in Diagnostics:
- Self-Test (BIST): Automatically checks ADC, power supply, and isolation circuits on startup; sends fault alerts to the DCS if anomalies are detected.
- Signal Monitoring: Detects overrange/underrange signals, open thermocouple/RTD wires, and short circuits – triggers configurable alarms for quick troubleshooting.
- Status LEDs: Dedicated LEDs for power (green), communication (yellow), and channel faults (red) – enable visual identification of module health.
- Hot-Swappable Design: Supports hot swapping in Ovation redundant racks – allows module replacement without shutting down the DCS, minimizing downtime for 24/7 industrial operations.
- Cold-Junction Compensation (CJC): Integrated CJC for thermocouple signals (accuracy ±0.1°C) – eliminates temperature errors from the module’s environment, ensuring reliable temperature measurement.
- Power Generation: Monitoring steam temperature/pressure in boilers, turbine oil temperature, generator cooling water flow rate, and fuel gas pressure (paired with pressure/temperature transmitters).
- Chemical & Petrochemical: Measuring reactor temperature, raw material flow rate, pipeline pressure, and pH value (paired with thermocouples, flow meters, and pH sensors).
- Water & Wastewater: Tracking water level in tanks, influent/effluent flow rate, and chemical concentration (paired with level transmitters and flow sensors).
- Manufacturing: Monitoring temperature of industrial ovens, hydraulic system pressure, and material viscosity (paired with RTDs and pressure sensors).
- Technical Manual: Emerson Ovation 1C31224G01 Analog Input Module Installation & Maintenance Guide (Document No. 1C31224G01-01) – available for download via Emerson’s official support portal, including wiring diagrams and configuration steps.
- Software Tools: Configured using Ovation Configuration Studio (v4.0 or higher) – enables signal type selection, alarm threshold setup, and data logging.
- Spare Parts: Compatible with Emerson’s Ovation spare kits (e.g., 1C31224G01-KIT), which include replacement fuses and isolation components.
- Base Model: 1C31224G01 (16-channel analog input module, standard version).
- Optional Accessories:
- Terminal base (1C31223G01) – required for field wiring termination.
- 24 V DC isolated power supply (1C31227G01) – for standalone testing or redundant power setups.
- EMC shielding kit (1C31245G01) – for high-noise industrial environments (e.g., near large motors).
- Lead Time: Typically 3–5 weeks for standard orders; 1–2 weeks for emergency spares (via Emerson’s authorized Ovation DCS distributors).
For questions about signal configuration, module pairing, or firmware updates, contact Emerson’s Process Automation Division or local Ovation DCS distributors.
Note: Always verify compatibility with your Ovation DCS software version and terminal base model using Emerson’s official compatibility matrix before ordering.
