Emerson 1C31164G02 Product Description (Ovation 16-channel RTD High Precision Temperature Input Module)

1C31164G02 is a 16-channel high-performance RTD temperature input module for the Emerson (formerly Westinghouse) Ovation DCS system. It is an upgraded model of 1C31164G01, optimized for harsh industrial environments, featuring a wider operating temperature range, stronger anti-interference capability, and higher long-term stability. It is specifically designed for Pt100/Pt1000 platinum resistance signal acquisition and is widely used in key temperature monitoring scenarios such as power generation, chemical industry, oil and gas, and metallurgy. 

I. Product Overview

Model: 1C31164G02

Brand: Emerson (formerly Westinghouse)

Series: Ovation DCS I/O Module (RTD-specific Personality Module)

Core Function: 16 independent isolated RTD (platinum resistance) temperature signal high-precision acquisition, conversion, and upload

Sensor Compatibility: Pt100 (100Ω @ 0℃), Pt1000 (1000Ω @ 0℃), compliant with DIN 43760 standard

Design Position: Industrial-grade precision temperature monitoring core component, fully compatible with replacing 1C31164G01, plug-and-play without rewiring or program modification

Origin: United States

Warranty: 12 months

II. Core Function Characteristics

1. High-density high-precision temperature acquisition

Integrated 16 independent isolated input channels, single module realizes multi-point dense temperature measurement, significantly saving cabinet space and wiring costs. Utilizing 14-bit high-precision A/D converter, temperature measurement range covers **-200℃ to +850℃**, suitable for most industrial high and low temperature scenarios. Typical accuracy at 25℃ is ±0.1℃, resolution 0.01℃, capable of accurately capturing minute temperature fluctuations; sampling rate 50–60SPS, response time less than 500ms, ensuring temperature change signals are quickly uploaded to the controller.

2. Full-channel fault self-diagnosis (core advantage)

Equipped with complete channel-level and module-level diagnostic capabilities, real-time monitoring of equipment and line status, reducing the difficulty of on-site fault troubleshooting. Supports RTD sensor open circuit and short circuit detection, can promptly alarm for sensor breakage, poor contact or short circuit faults; supports 3-wire/4-wire wiring cable open circuit, resistance imbalance diagnosis, accurately locating line faults; simultaneously monitoring module power supply overvoltage/undervoltage and communication abnormalities with Ovation controller, issues such as single-channel fault do not affect the normal operation of other channels, ensuring the continuous and stable operation of the system.

3. Strong isolation and anti-interference design

Utilizing 1500VAC channel-to-channel, channel - bus dual isolation design, effectively blocking electrical interference and signal crosstalk. Common-mode rejection ratio greater than 120dB, capable of suppressing common-mode interference generated by industrial site equipment such as frequency converters, motors, and transformers. Dual hardware filtering and software filtering configuration, filtering time 0–100ms, flexible configuration for different interference intensities of the site environment; Model G02 optimizes PCB layout and shielding design, enhancing EMI/ESD protection capability, significantly improving anti-interference performance compared to G01.

4. Hot-swappable and redundancy support

Supports online hot-swappable, can directly plug and replace the module during system operation, no need for shutdown, significantly reducing maintenance costs and downtime risks. Compatible with Ovation DCS system redundancy architecture, supports controller and I/O bus redundancy configuration, can achieve seamless switching in the event of a fault, ensuring the continuity and reliability of critical process temperature monitoring.

III. Detailed Technical Specifications

Electrical Parameters

Power supply voltage: 24VDC ±10%, taken from Ovation backplane main power supply and auxiliary power supply

Typical power consumption: ≤4.8W

Input signal type: Pt100, Pt1000 (DIN standard)

Temperature measurement range: -200℃ ~ +850℃

Measurement accuracy: ±0.1℃ (25℃ environment, Pt100)

Resolution: 14-bit A/D converter (0.01℃)

Sampling rate: 50–60SPS

Isolation level: 1500VAC / 1min (channel-to-channel, channel - backplane)

Common-mode rejection ratio: >120dB Filter configuration: Dual filtering by hardware and software, configurable from 0 to 100 ms

Environmental parameters

Operating temperature: -10°C to +65°C (extends the temperature range compared to G01, suitable for low-temperature cabinets or high-temperature environments)

Storage temperature: -40°C to +85°C

Relative humidity: 5% to 95% RH (no condensation)

Vibration tolerance: 5g (compliant with IEC 60068-2-6 standard)

Impact tolerance: 30g (compliant with IEC 60068-2-6 standard)

Protection level: IP20 (dust-proof, finger-proof)

Certifications: CE, RoHS certification Physical parameters

Dimensions: 122 × 50 × 165 mm (standard module size of Ovation)

Weight: Approximately 0.32 kg

Installation method: Standard DIN rail installation

Status indicator lights: Equipped with PWR (power), RUN (operation), COM (communication), FAULT (fault) indicator lights, as well as 16 channel status indicator lights for CH0–CH15, which display the real-time operating status of the module and channels

Communication parameters

Bus protocol: Ovation dedicated I/O bus

Data update rate: 100ms (configurable)

Redundancy support: Compatible with Ovation system redundancy configuration, with no disturbance switching

IV. Typical application scenarios

Power generation industry

Used for temperature monitoring of key equipment and media such as boiler tube wall temperature, turbine bearing temperature, flue gas inlet and outlet temperature, generator stator/rotor temperature, condenser temperature, etc., to ensure the safe and stable operation of power generation equipment.

Chemical industry

Suitable for precise temperature control scenarios such as temperature in reaction vessels, distillation tower inner temperature, pipeline medium temperature, storage tank material temperature, heat exchanger inlet and outlet temperature, etc., meeting the strict temperature accuracy requirements of chemical processes.

Oil and gas industry

Applied to monitoring of wellhead temperature, temperature along the pipeline of oil or gas transportation, oil temperature in storage tanks, compressor equipment temperature, reaction temperature in refining and chemical plants, etc., suitable for high and low temperature and strong interference environments at oil and gas sites. Metallurgical industry

It is used for monitoring the temperatures of various sections of the blast furnace body, molten steel temperature, heating furnace temperature, water temperature of the cooling system, and the temperature of the rolling machine equipment, ensuring the stability of the temperature and the safety of the equipment in the metallurgical production process.

Other industrial scenarios

It is widely applicable to the process links in industries such as pharmaceuticals, food processing, water treatment, and papermaking that require high-precision temperature measurement and control. It is also suitable for upgrading the Ovation old system and directly replacing 1C31164G01 to improve system performance.

VII. Installation and Wiring Instructions

Module Installation

It is installed using the standard DIN rail installation method, which is compatible with the Ovation standard cabinet. When installing, the module spacing should be ≥ 20mm to ensure the heat dissipation space; the installation position should be away from strong electromagnetic interference equipment such as frequency converters, motors, and transformers to avoid signal interference. It supports hot-swappable operations, and when plugging or unplugging, there is no need to power off, simply align and push or pull it into or out of the rail.

Sensor Wiring (3-wire system as the main type)

Pt100/Pt1000 3-wire wiring (industrial mainstream)

Channel +: Connect to the common terminal of the RTD sensor

Channel -: Connect to the other end of the RTD sensor

Compensation Wire: Connect to the third wire of the RTD sensor to eliminate the influence of cable resistance on measurement accuracy

4-wire wiring (ultra-high precision scenarios)

4-wire wiring adds an additional compensation wire on the basis of 3-wire wiring, further eliminating the influence of cable resistance and contact resistance, suitable for scenarios with extremely high precision requirements, with wiring methods similar to 3-wire wiring, connect according to terminal markings.

Cable Requirements

It is recommended to use shielded twisted-pair cables, with a cable cross-sectional area of 1.5mm²; the shielding layer adopts single-ended grounding method, only grounding on the cabinet side to avoid forming circulating currents and introducing interference. The maximum cable length of 3-wire wiring ≤ 500m, and ≤ 1000m for 4-wire wiring, meeting the wiring requirements of most industrial sites.

Software Configuration (Ovation System)

After module installation and wiring are completed, simple configuration can be made in the Ovation system to put it into use: select channel type as Pt100 or Pt1000; set wiring method as 3-wire or 4-wire; configure filtering time (0–100ms); select temperature unit (℃/℉); set high/low temperature alarms, break line alarm thresholds, etc., parameters.

VIII. Core Differences between G02 and G01

Working Temperature Range: G01 is 0℃~+60℃, G02 extends to - 10℃~+65℃, suitable for low-temperature cabinets or high-temperature environments;

Anti-interference Capacity: G02 optimizes PCB shielding and filtering circuits, with improved EMI/ESD protection level, stronger anti-interference performance;

Stability: G02 uses higher-grade industrial-level components, higher clock accuracy, smaller long-term drift, and longer MTBF (Mean Time Between Failures);

Compatibility: G02 is fully compatible with G01, can be directly replaced, without modifying the system program and on-site wiring.

IX. Ordering and Supplementary Information

Order Model: 1C31164G02

Supplementary Accessories:

Terminal Block: 1C31190G01 (16-channel dedicated terminals, used for wiring)

Connection Cable: Ovation-specific I/O bus cable

Sensor Compatibility: Pt100/Pt1000 (3-wire / 4-wire wiring, select according to on-site requirements)