TRICONEX 3720 Analog Input Module TMR TRICON3720

The Triconex 3720 is the analogue input module and key component of Schneider Electric's tricon Safety Instrumented System (SIS), featuring a Triple Module Redundancy (TMR) architecture, designed for high-reliability industrial applications demanding accurate analogue signal processing, and is primarily used to convert analogue signals from various sensors like temperature, pressure, and flow into digital signals for processing, control, and monitoring by the TRICON system, providing a triple modular redundancy (TMR) structure with three identical sub-circuits, each performing independent control, and it is an analog input module that can be configured for either standard (12-bit) or high (14-bit) resolution, having 32 differential input points and being capable of accepting variable voltage signals, converting them into digital values and transmitting them as required.

Technical Specifications.

Model: 3720

Brand: TRICONEX (Schneider Electric's brand of safety-critical control systems)

Type: High Density Analogue Input Module

Applicable systems: TRICONEX Tricon v9/v10/v11 safety systems (Tricon CX/Trident series)

Functional Positioning:Used to collect analogue signals (e.g. temperature, pressure, flow, etc.) from industrial sites, supporting SIL3 safety integrity level (IEC 61508/61511).

Input type:Support 4-20mA, 0-10V, thermocouple (TC), RTD (RTD), etc. (configured by jumper or software)

Number of channels: 16 channels (single-ended input) or 8 channels (differential input)

Resolution: 16-bit (Δ-sigma ADC), minimum detectable signal change ≤ 0.015% FS

Sampling rate: 10ms per channel (full-channel scan period ≤ 160ms)

Isolation mode: full isolation between channels (1500V AC), module and system backplane optocoupler isolation

Accuracy: ±0.1% FS (@25°C), ±0.2% FS (full temperature range -40°C ~ +70°C)

Supply Voltage:24V DC (backplane supply, range 19.2V ~ 30V DC)

Power Consumption:≤5W (full load)

Weight: 2.5 kg

Country of origin: USA

Functionality

Core Functions

1. High-precision signal acquisition: support for a variety of industry-standard analogue signal input, adapted to the transmitter, sensor direct access.

2. Built-in digital filtering function can suppress industrial frequency interference (50/60Hz suppression ratio ≥80dB).

Safe and redundant design:

1. Triple module redundancy (TMR) architecture, support 2oo3 (2 out of 3) voting logic, to ensure that a single point of failure does not affect system operation.

2. Channel-level diagnostic functions (open-circuit detection, over-range alarm, hardware failure self-test).

Hot-swappable support: support online replacement of modules (need to confirm the system status through the Tricon maintenance tool).

Communication and Configuration

1. Backplane communication: Configured by TriStation 1131 software, support Modbus TCP/RTU protocol (need to cooperate with communication module).

2. HART Protocol Integration: Optional HART modem (Model 3720H) supports bidirectional communication with HART 7 devices.

3. Alarm output: can trigger DO module linkage or upload to DCS/SCADA through logic programming.

RELATED PRODUCTS: