Description
Emerson 1C31166G01
Technical Specifications
- Number of Input Channels: 8 analog input channels
- Input Signal: 4‑20mA analog current signal
- Isolation Type: Optical isolation between field side and backplane circuit
- Operating Ambient Temperature: 0℃ ~ 60℃
- Storage Temperature: -40℃ ~ 85℃
- Relative Humidity: 5% ~ 95%, non‑condensing
- Backplane Communication: Ovation dedicated DCS bus
- Built‑in channel‑level loop fault diagnosis function
Functional Features
High precision analog‑to‑digital conversion circuit converts 4‑20mA field signals into digital measurement data. Optical isolation separates field instrument wiring and DCS backplane circuit to block surge and common‑mode interference. Built‑in diagnostic circuit detects open circuit and short circuit of field signal loop. Front panel LED indicators display running status of each channel and module fault state. Rack plug‑in structure supports hot swap under non‑critical process operating conditions.
Application Scenarios
Ovation DCS control cabinets in thermal power plants, chemical plants, water treatment plants and pharmaceutical factories. It collects measurement signals from pressure transmitters, flow transmitters, liquid level transmitters and temperature transmitters.
Performance Parameters
Analog‑to‑digital conversion maintains high measurement accuracy within full working temperature range. Optical isolation withstands high common‑mode voltage induced by long field cables. Fault detection circuit identifies loop wiring abnormality rapidly. Backplane bus communication guarantees stable transmission of measurement data and fault information.
Material Composition
Flame‑retardant engineering plastic housing. Multi‑layer flame‑retardant glass fiber epoxy PCB. Analog‑to‑digital conversion chips, optical isolation components, processing microprocessor and LED indicators. Gold plated copper alloy backplane connector. Matched terminal base uses flame‑retardant PA plastic and nickel plated copper terminals.
Structural Features
Standard plug‑in card for Ovation DCS rack slots. Front panel equipped with module fault LED and independent LED indicators for each input channel. Guide rails and mechanical latches lock module firmly inside rack. Rear gold plated connector mates with Ovation rack backplane bus. Front matched terminal base accepts field transmitter wiring cables.
Working Principle
Field transmitters send 4‑20mA analog current signals to module input channels through supporting terminal base. Optical isolation chips isolate field circuit from DCS backplane circuit. Analog‑to‑digital converter converts analog current signal into digital measurement value. Digital data transmits to Ovation controller via backplane bus. Onboard sampling circuit continuously monitors loop current range, triggers fault alarm and uploads alarm message to DCS system when wire break or short circuit is detected.
Installation Requirements
Insert module along rack guide rail into Ovation rack slot and lock mechanical latch. Use shielded twisted pair cables for field transmitter wiring. Cable shield implements single‑point grounding inside control cabinet. Separate analog signal cables from high‑voltage power cables. Reserve air circulation space for module heat dissipation.
Precautions for Use
Cut off field transmitter power before wiring work. Verify channel reading accuracy after module replacement. Inspect signal cable insulation and terminal tightness periodically. Do not apply overvoltage to input terminals. Do not disassemble module housing.
