ICS Triplex T8472 Trusted TMR 120 V AC Digital Output Module

Configured for high-voltage field output control in Trusted safety systems, the ICS Triplex T8472 (T8472 Digital Output Module) provides 40-channel 120 V AC output interfaces with TMR processing, line diagnostics, and galvanic isolation.

Hardware Specifications

TMR Architecture and Safety Diagnostics

The T8472 implements Triple Modular Redundancy with three internal signal channels and 2oo3 voting. This architecture permits fault detection without relying on a single output processing path. Continuous line monitoring checks field wiring for open-circuit and short-circuit conditions. On-board diagnostics perform internal hardware self-tests while maintaining the specified process output behavior.

The module provides galvanic isolation between individual channels and the module bus. This separation limits electrical fault propagation between field circuits and controller-side circuitry.

Frequently Asked Questions (FAQ)

Q: Does the T8472 support live replacement?
A: The supplied data identifies the T8472 as hot-swappable, allowing module replacement in an active Trusted system without controller power removal.

Q: How many AC digital outputs are provided?
A: The T8472 provides 40 digital output channels with a nominal operating voltage of 120 V AC.

Q: What diagnostic functions are specified?
A: The module provides field wiring monitoring for open and short circuits together with internal hardware self-diagnostics.

Field Installation Guidelines

Install the T8472 only in the designated Trusted chassis position and follow the applicable system installation documentation.

Verify the field supply voltage and output circuit ratings before connecting 120 V AC loads. Keep AC field wiring separated from low-level signal and communication wiring to reduce coupling and interference.

Terminate protective earth and cable shields according to the cabinet grounding design. Avoid routing high-voltage output conductors alongside sensitive instrumentation wiring for extended distances.

Before commissioning, verify channel identification, terminal assignments, field load compatibility, wiring continuity, and insulation condition. Confirm that diagnostic indications remain clear after applying field power.