General Information

• Brand: Westinghouse (Emerson Electric)
• Model: 1C31223G01
• Product Type: Terminal Base Unit (TBU) – a passive wiring interface for Ovation I/O modules
• System Compatibility: Exclusively compatible with Emerson Ovation DCS I/O modules (e.g., 1C31132G01 analog input modules, 1C31194G03 digital I/O modules) and Ovation 3.x to 6.x software versions.
• Core Function: Provides a secure, organized terminal block for field wiring termination; transfers signals between field devices and the paired I/O module without signal modification (passive design, no active electronics).

Technical Specifications

1. Physical & Mechanical Design

• Form Factor: 19-inch rack-mounted, matching Ovation DCS 3U rack dimensions (compatible with standard control cabinets).
• Dimensions: 152.4 mm (W) × 228.6 mm (H) × 38.1 mm (D) [6.0” × 9.0” × 1.5”] – identical to the I/O modules it supports, ensuring aligned mounting.
• Weight: ~0.5 kg (1.1 lbs) – lightweight, facilitating easy rack installation.
• Mounting: Secures to Ovation DCS racks via captive screws; no additional brackets required.
• Terminal Blocks: 32-position screw-terminal blocks (Phoenix Contact or equivalent), accepting 12–24 AWG (American Wire Gauge) solid or stranded wire.
  • Wire clamping torque: 0.5–0.8 N·m (4.4–7.1 lbf·in) – prevents loose connections in vibrating industrial environments.

2. Electrical Characteristics

• Signal Compatibility: Supports all signal types of paired Ovation I/O modules, including:
  • Digital signals (dry/wet contacts, 24V DC).
  • Analog signals (4–20 mA, ±5V DC, ±10V DC).
  • Thermocouple signals (Type J/K/T/E/R/S/B) and RTD signals (Pt100) (when paired with compatible I/O modules).
• Isolation: No built-in electrical isolation – relies on the isolation of the paired I/O module (e.g., 2.5 kVrms isolation from 1C31132G01 modules).
• Voltage/Currency Rating: Rated for 300V AC/DC and 10A per terminal – sufficient for most industrial field wiring requirements.

3. Environmental Specifications

• Operating Temperature: -40°C to +85°C (-40°F to 185°F) – wider range than most I/O modules, enabling installation in extreme-temperature cabinets.
• Storage Temperature: -40°C to +85°C (-40°F to 185°F) – no special storage conditions required for spare units.
• Humidity: 5%–95% RH (non-condensing) – resistant to moisture in chemical or wastewater facilities.
• Vibration Resistance: 5 g (10–500 Hz) per IEC 60068-2-6 (sinusoidal); 10 g (100–2000 Hz) per IEC 60068-2-27 (random) – withstands vibration from industrial machinery.
• Shock Resistance: 25 g (11 ms half-sine wave) per IEC 60068-2-27 (transient) – durable against accidental impacts during maintenance.
• Protection Class: IP20 (front panel) – designed for indoor, enclosed control cabinets (prevents dust ingress but requires protection from liquids).

4. Safety & Compliance

• Certifications:
  • CE (EN 61326-1 for EMC compatibility) – ensures no interference with other DCS components.
  • UL 508 (industrial control equipment safety standard) – compliant for use in North American industrial facilities.
  • CSA C22.2 No. 14 (Canadian safety standard) – meets Canadian electrical safety requirements.
• Fire Rating: UL94 V-0 (plastic housing) – self-extinguishing in case of fire, reducing fire spread risk.

Key Features

1. Passive, Reliable Design: No active electronics (e.g., capacitors, resistors) – eliminates component failure risks, ensuring long-term stability (MTBF > 1,000,000 hours).
2. Module Alignment: Exact physical matching to Ovation I/O modules – when paired, the module snaps onto the terminal base, creating a secure mechanical and electrical connection (no loose cables between module and base).
3. Wiring Organization: Labeled terminal positions (e.g., “DI1,” “DO3,” “AI2”) – align with the paired I/O module’s channel numbering, reducing wiring errors during installation.
4. Maintenance-Friendly:

• Hot-Swap Compatibility: When paired with hot-swappable Ovation I/O modules, the terminal base remains wired to field devices during module replacement – minimizes downtime.
• Test Points: Dedicated test terminals for each channel – enable signal measurement (e.g., with a multimeter) without disconnecting field wires, simplifying troubleshooting.

5. Wide Compatibility: Works with most Ovation I/O module types (digital, analog, thermocouple/RTD) – reduces the need for multiple terminal base variants, simplifying inventory management.

Applications

• Power Generation: Terminating wiring for turbine temperature sensors, boiler pressure transmitters, and generator breaker status switches (paired with 1C31132G01 analog input modules).
• Chemical & Petrochemical: Connecting reactor level sensors, valve position switches, and emergency shutdown (ESD) triggers (paired with 1C31194G03 digital I/O modules).
• Water & Wastewater: Wiring pump run/stop sensors, flow meters, and chemical dosing valve actuators (paired with 1C31181G02 remote I/O modules).
• Manufacturing: Terminating conveyor belt position sensors, robotic arm limit switches, and product quality detectors (paired with Ovation digital input modules).

Documentation & Support

• Technical Manual: Emerson Ovation 1C31223G01 Terminal Base Unit Installation Guide (Document No. 1C31223G01-01) – available for download via Emerson’s official support portal. It includes wiring diagrams, terminal labeling guides, and module pairing instructions.
• Compatibility List: Refer to Emerson’s Ovation I/O Module & Terminal Base Compatibility Matrix (Document No. 8900-0012) to confirm pairing with specific I/O modules.
• Spare Parts: No replaceable components (passive design); spare units are recommended for critical systems (part number: 1C31223G01).

Ordering Information

• Base Model: 1C31223G01 (standard terminal base unit, 32-position terminals).
• Optional Accessories:
  • Terminal block covers (1C31223G01-CVR) – protect exposed terminals from dust or accidental contact.
  • Wiring labels (1C31223G01-LBL) – pre-printed labels matching terminal positions for faster wiring.
• Lead Time: Typically 2–3 weeks for standard orders; 1 week for emergency spares (via Emerson’s authorized Ovation DCS distributors).