Invensys Triconex 3708E Isolated Thermocouple Module

Voltage: 0-5V, + 6%.

No. of Input signals:16,differential,isolated 

Input Update Rate: 50ms

Thermocouple types supported: J,K,T,E

Input Resistance(load): 30MΩ (DC),min

Power-Off Resistance: 30KΩ (DC),typical

Common Mode Range: ±200 VDC, max (channel-to-channel or channel-to-ground)

Leg-to-Leg Isolation: 20KΩ, typical

Input point Protection: 110 VAC, continuous

Reference junction compensation range: 32°-140°F (0°-60°C)

Triple Modular Redundancy (TMR) Architecture: Employs three independent channels for input/output processing, enabling continuous operation even if one channel fails.Ensures ultra-high reliability through hardware voting mechanisms for fault detection and masking.

Thermocouple Signal Conditioning: The module processes signals from J, K, T, and E-type thermocouples, covering a wide temperature range (-200°C to 1372°C). It performs 16-bit analog-to-digital conversion with high accuracy (<0.15% Full-Scale Range), ensuring reliable temperature data for safety-critical decisions.

Electrical Isolation and Noise Immunity: Channels are individually isolated (1500V AC isolation, 20 kΩ pin-to-pin resistance) with high noise rejection (-90 dB @ 60 Hz), preventing electromagnetic interference (EMI) and ground loops. This ensures stable performance in electrically noisy environments like oil refineries or chemical plants

Real-Time Diagnostics and Fault Detection: Embedded diagnostics monitor thermocouple integrity, detect open-circuit faults, and validate reference junction compensation. Status LEDs (PASS, FAULT, ACTIVE, CJ FAULT) provide instant visual alerts, simplifying troubleshooting and reducing downtime.

Hot-Swap Capability: Supports online replacement without system shutdown, enabling maintenance without interrupting critical operations—a key feature for industries like power generation and nuclear facilities.

Environmental Robustness: Operates reliably in extreme temperatures (0°C to 60°C for reference junction compensation, with extended ranges for industrial settings) and complies with certifications for hazardous areas, including explosive atmospheres (ATEX/IECEx).

Petrochemical and Oil & Gas: Triconex 3708E is applied for the temperature monitoring of reactors, compressors, heating furnaces and other equipment and that allows to provide a real-time temperaturedata collection for emergency shutdown system (ESD) and high integrity pressure protection system (HIPPS);

Power and energy: Triconex 3708E monitoring turbine bearing temperature, turbine steam upwards temperature control system of gasification powergeneration system, anti-surge control and equipment protection are based on temperature and turbine bearing temperature;

Process: Integrate with BMS to monitor the furnace temperature or be connected to temperature sensors inF&G system for fire warning;

Pharmaceutical and food industry: Triconex 3708E stands guard over the process equipment temperature of the clean room, everything will be according to GMP production requirement.