Description
Emerson 1C31124G01
Technical Specifications:
- Brand: Emerson (Ovation)
- Model: 1C31124G01
- Product Type: 24 VDC Discrete Input Module
- System Platform: Emerson Ovation DCS
- Input Voltage Range: 0 to 60 VDC
- Input Voltage Resolution: 5mV
- Input Impedance: 10 MΩ
- Channel Count: Typically up to 32 DI channels per card (varies by FTA and revision)
- Maximum Sampling Rate: 20 ksps (kilo-samples per second)
- Power Supply: +5VDC from VME/Ovation backplane
- Communication Interface: Ovation I/O bus via carrier; VME bus support
- Module Address: User-selectable (1 to 30)
- Operating Temperature: -20°C to +70°C (some sources: 0°C to 60°C)
- Storage Temperature: -40°C to +85°C
- Humidity: 5% to 95% (non-condensing)
- Protection Class: IP20
- Dimensions: 12.1 × 5.1 × 16.6 cm (3.8″ × 6.9″ × 1.5″)
- Weight: Approximately 0.35 kg
- Signal Standards: Supports TTL and CMOS signal standards
- Origin: United States
Functional Features:
- High Channel Density: Up to 32 discrete input channels in a single module
- Input Filtering and Debounce: Rejects contact bounce and electrical noise to prevent false transitions
- Sequence of Events (SOE) Support: Certain revisions support SOE capture for fast diagnostics during trips and starts
- Electrical Isolation: Provides isolation between input channels and the system to prevent interference
- Hot-Swap Serviceability: Replaceable under power on the I/O carrier to shorten maintenance windows
- FTA Compatibility: Supports standard Ovation Field Termination Assemblies for clean cabinet wiring
- Status LEDs: Quick visual diagnostics during commissioning and fault finding
- Redundancy Friendly: Works in redundant controller architectures used across power and water facilities
- High-Speed Acquisition: Supports high-speed sampling for detecting rapidly changing digital signals
Application Scenarios:
- Turbine protection and permissive inputs in power generation
- Motor starter status monitoring in balance-of-plant systems
- Limit switch and proximity sensor inputs in process control
- Interlock and safety circuit monitoring in chemical plants
- Valve position indication in water treatment facilities
- Emergency shutdown system inputs in oil and gas facilities
- Equipment status monitoring in manufacturing plants
- Fire and gas detection system inputs
Performance Parameters:
- Channels: Up to 32 DI channels
- Input Voltage Range: 0 to 60 VDC
- Resolution: 5mV
- Input Impedance: 10 MΩ
- Sampling Rate: Up to 20 ksps
- Response Time: Fast response for real-time status monitoring
- SOE Timestamp Accuracy: Millisecond-level precision (revision dependent)
Material Composition:
- Industrial-grade PCB circuit board
- Input signal conditioning circuits
- Optical isolation components
- Microprocessor for channel management
- Communication interface circuits
- Terminal block connectors
- Status LED indicators
- Protective housing
Structural Features:
- Standard Ovation plug-in card format
- Front-accessible terminal blocks via FTA
- LED indicators for each input channel status
- Module address selection switches
- Locking mechanism for secure carrier installation
- Compact form factor for high-density installations
- Labeling for channel identification
- Cooling provisions for thermal management
Working Principle:
The 1C31124G01 continuously monitors the voltage state on each of its discrete input channels. When a field device (such as a limit switch or relay contact) closes, it applies 24 VDC to the input channel. The module’s input conditioning circuit filters out contact bounce and electrical noise, then converts the analog voltage level to a clean digital state (on/off). These digital states are timestamped (in SOE-capable revisions) and transmitted to the Ovation controller via the backplane bus. The controller uses these status inputs for logic decisions, interlocks, alarms, and sequence-of-events recording.
