Emerson 1C31116G04 Ovation 8-Channel Analog Input AI Module

1C31116G04 is an 8-channel analog input module for Emerson Ovation DCS (originally Westinghouse), dedicated to industrial process analog signal collection. It converts field 4-20mA, multi-range voltage analog signals into digital data and transmits real-time measurement values to the Ovation controller via rack backplane bus. Built-in temperature compensation circuit ensures stable high-precision sampling under wide temperature fluctuations, widely deployed in thermal power, petrochemical and water plant control systems.

The module supports hot-swap replacement without rack power-off, each channel equips independent overvoltage & overcurrent protection. It adopts standard rack plug-in installation, matched with Ovation I/O rack base, featuring full channel self-diagnosis and fault alarm upload to HMI monitoring screen. It is a mainstream spare part for upgrading and maintaining Ovation distributed control cabinets.

Main Specifications

• Brand: Emerson (Westinghouse); Model: 1C31116G04; Series: Ovation DCS System
• Module Type: 8-channel isolated analog input (AI) module with built-in temperature compensation sensor
• Supported Signals: 4–20mA DC current, 1–5V, 0–10V, ±10V DC voltage; per-channel programmable range
• Conversion Performance: 16-bit high-resolution ADC, accuracy ±0.1% full scale at 25℃, max sampling rate 1200 samples/sec
• Power Supply: 24VDC wide input (18~30VDC), total power consumption ≤5W
• Environment Range: Operating temp -40℃ ~ +70℃; storage -40℃ ~ +85℃; humidity 5%~95% non-condensing, IP20 cabinet
• Core Features: Full hot-swap, per-channel hardware overvoltage/short-circuit protection, channel fault self-diagnosis
• Communication: Ovation proprietary rack backplane bus, real-time two-way data exchange with Ovation controller
• Installation: Standard Ovation I/O rack plug-in module, integrated terminal wiring interface

Core Functions

• Collect process analog signals: boiler temperature, pipeline pressure, liquid level, flow transmitter 4-20mA measuring signals
• Built-in temperature compensation circuit automatically calibrates sampling deviation caused by cabinet temperature changes to maintain stable measurement precision
• Convert continuous analog field signals into standardized digital values, upload to Ovation main controller for closed-loop regulation and logic calculation
• Per-channel isolation circuit suppresses electromagnetic interference from large fans, pumps and high-voltage equipment to avoid signal distortion
• Support online hot swap; ｒｅｐｌａｃｅ faulty module directly without shutting down the entire DCS rack to cut production downtime loss
• Real-time self-check each channel; automatically report open circuit, short circuit, signal over-range faults to local HMI and central monitoring system
• Multiple modules can be installed in one I/O rack to expand dozens of analog measurement monitoring points for large-scale process production lines

Application Scenarios

• Thermal power plant boiler, turbine auxiliary Ovation DCS analog signal acquisition cabinet core matching module
• Petrochemical refining, natural gas plant pipeline pressure, temperature, flow transmitter signal centralized collection control
• Municipal water supply & sewage plant pump station liquid level, pressure decentralized monitoring DCS cabinet configuration
• On-site replacement of aging, damaged AI modules in existing Ovation distributed I/O racks
• Factory automation renovation expanding analog measurement monitoring points based on Ovation control system
• Power, chemical, metallurgy enterprises long-term spare parts inventory for Ovation analog input modules
• Pulp & paper, pharmaceutical continuous production process temperature, pressure precise measurement control cabinet layout