The 3700A Analog Input Module from Triconex is a high‑integrity, fault‑tolerant input module designed for use in Triple Modular Redundant (TMR) safety systems. It provides 32 isolated analog input channels, supporting a wide range of industrial sensors used in critical process control, shutdown, and monitoring applications.
Technical Specifications
Parameter
Description
Model Number
3700A
Product Type
Analog Input Module
Architecture
Triple Modular Redundant (TMR)
Input Channels
32 isolated channels
Supported Signals
4–20 mA, 1–5 V, configurable per system requirements
Resolution
High‑resolution A/D conversion (module class typical)
Diagnostics
Channel health monitoring, open‑circuit detection, TMR validation
Isolation
Channel‑to‑channel and channel‑to‑backplane isolation
Typical Use
Process variables, pressure, temperature, flow, level, vibration
Mounting
Tricon chassis slot
Weight
Approx. 3 kg (module class)
Shipping Weight
4 kg
Application Scenarios
The 3700A is widely used in:
Emergency shutdown (ESD) systems
Burner management and turbine protection
Petrochemical and refinery process control
Nuclear and high‑risk industrial safety systems
SIL3‑certified TMR architectures requiring validated analog inputs
FAQ
Q: What types of sensors can the 3700A accept It supports standard industrial analog transmitters such as 4–20 mA loops, pressure sensors, temperature transmitters, and other voltage/current‑based devices.
Q: Does the module support hot‑swapping Yes. Triconex I/O modules can typically be replaced online without shutting down the system.
Q: Is the module suitable for SIL3 applications Yes. When installed in a certified Tricon system, it meets SIL3 safety requirements.
