Triconex 3351S2 Analog Input Module

Frequently Asked Questions (FAQ)

Q1: What type of signals does the 3351S2 module accept?
A1: The module accepts 4–20 mA analog current signals on all 32 input channels.

Q2: Is manual calibration required for the 3351S2?
A2: No. The module is factory-calibrated and guaranteed to remain in calibration for the life of the product.

Q3: Can the 3351S2 operate with a hot-spare module?
A3: Yes. It fully supports a hot-spare configuration, allowing automatic failover in the event of a module fault.

Q4: What diagnostic features are included in the 3351S2?
A4: It includes built-in self-test circuitry that detects stuck-at and accuracy faults typically in less than 500 milliseconds.

Q5: How does the Trident system handle input signal discrepancies in TMR mode?
A5: The system uses a mid-value voting algorithm across the three channels to ensure reliability and safety.

Q6: What is the input bus type used by the 3351S2?
A6: It uses a triplicated RS-485 I/O bus operating at 2 Mbps with HDLC protocol for data integrity.

Q7: Does the module have any visual fault indicators?
A7: Yes. The front panel includes LED indicators for PASS, FAULT, ACTIVE, and FIELD POWER conditions.

Q8: What is the operating temperature range for the 3351S2?
A8: The standard operating range is 0°C to 60°C, with extended support from -20°C to +70°C.

3351S2 Analog Input Module Triconex

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