ICS Triplex T7481A Monitored Guarded Output Module

Description

The ICS Triplex T7481A is a high-integrity Monitored Guarded Output module designed for the Regent safety system. It provides 8 supervised digital output channels for driving critical final control elements, ensuring that field devices like valves and motors respond correctly to safety logic.

Specifications

• Output Channels: 8 independent, guarded output channels.

• Output Voltage: 24 Vdc nominal (range 18 Vdc to 32 Vdc).

• Current Rating: 2 Amps per channel (maximum continuous).

• Safety Rating: Suitable for SIL 3 safety-critical applications.

• Architecture: Quad-redundant output switch configuration for fault tolerance.

• Leakage Current: Less than 1 mA in the "Off" state.

• Power Consumption: 10 W typical; 15 W maximum (excluding load).

• Isolation: 2500 Vdc channel-to-logic; 500 Vdc channel-to-channel.

• Operating Temperature: 0°C to +60°C.

Features

• Guarded Switch Architecture: Utilizes a series-parallel switch arrangement to ensure the output can always be de-energized, even in the event of a component failure.

• Line Monitoring: Continuously supervises field wiring for open circuits and short circuits in both the "On" and "Off" states.

• Automatic Self-Testing: Performs periodic pulse-testing of output switches to verify functional integrity without affecting the state of the field device.

• Front Panel Indicators: Includes dedicated LEDs for each channel to display output status, fuse health, and detected field wiring faults.

• Hot Swappable: Designed for online replacement, allowing for maintenance without interrupting the overall process or safety function.

• Fault Historian Integration: Automatically logs all internal module faults and field-side wiring errors to the system-wide diagnostic database.