TRICONEX 3700A TMR 32-Channel Differential Analog Input Module
- Product Code: 3700A
- Availability: In Stock
TRICONEX 3700A TMR 32-Channel Differential Analog Input Module For Tricon SIS Safety Instrumented System
Manufacturer: Schneider Electric Triconex (Former Invensys)
Part Number: 3700A
Applicable Platform: Tricon CX/EX/RX Series TMR Safety Instrumented System (SIS)
Product Type: Triple Modular Redundant (TMR) DC Coupled Differential Analog Input Module
Channel Configuration: 32 differential non-isolated analog input channels, support 0-5VDC / 4-20mA with external shunt resistors
Matching Accessory: Dedicated FTA field termination panel for transmitter wiring
Core Safety Certification: IEC 61508 SIL3, TÜV safety certification, FMEDA safety failure analysis report available
1. Full Detailed Product Overview
3700A is high-density triple modular redundant analog input module developed for Triconex Tricon safety system, dedicated to collecting critical process analog signals from transmitters in ESD emergency shutdown, F&G fire & gas detection and BMS burner management safety loops.
It adopts standard TMR triple independent signal acquisition channels with 2oo3 voting logic, each channel independently samples field analog signals, and the internal voter compares three groups of sampling data to eliminate single-point hardware failure risks, realizing bumpless fault-tolerant signal collection without system shutdown.
The module integrates 32 differential DC-coupled input channels without per-channel galvanic isolation, compatible with two mainstream signal types: 0-5VDC voltage transmitters and 4-20mA current transmitters (matched with external shunt resistors to convert current signals into voltage signals). The 12-bit high-precision AD conversion chip ensures full-scale accuracy less than 0.15%FS, meeting high-precision measurement demands of temperature, pressure, liquid level and flow transmitters in hazardous process industries.
The module occupies single slot of Tricon standard I/O chassis, fully supports online hot-swap replacement without cutting off rack power supply, communicates with TMR main processor via redundant TriBus high-speed backplane bus, and realizes real-time data upload and channel fault diagnosis. Multiple LED status indicators on front panel display module running, bus communication and internal fault status for fast on-site troubleshooting.
Industrial rugged wide-temperature hardware design adapts to severe working environments of petrochemical refineries, offshore oil & gas platforms, LNG terminals, thermal power plants and nuclear auxiliary systems, certified for Class I Div 2 hazardous locations and ATEX Zone 2 explosive environments, widely used in high-risk process safety monitoring and interlock control systems.
