FC-TSRO-08UNI | Honeywell 8-Channel Relay Output Field Termination Assembly

Technical Overview

The FC-TSRO-08UNI is a high-performance relay-based Field Termination Assembly (FTA) designed for the Honeywell Safety Manager and FSC platforms. This module functions as a critical isolation interface between low-power controller logic and high-power field actuators. By utilizing electromagnetic relays, the FC-TSRO-08UNI enables the control of both AC and DC loads, providing galvanic isolation and robust switching capabilities for critical safety loops.

Each of the eight channels is independently fused to protect the internal circuitry and field wiring from overcurrent conditions. The universal design allows for a wide range of output voltages, making it an essential component for driving interposing relays, motor starters, and heavy-duty solenoids in industrial environments.

Technical Specifications

• Manufacturer Honeywell

• Model Number FC-TSRO-08UNI

• Hardware Code FC-TSRO-08UNI

• Module Type Relay Output Field Termination Assembly (FTA)

• Number of Channels 8 Isolated Outputs

• Nominal Control Voltage 24 Vdc

• Maximum Input Tolerance 36 Vdc

• Relay Pick-up Threshold 19.2 Vdc

• Maximum Output Current 2 A per channel (Fuse protected)

• Minimum Load Requirement 1 mA at 5 V (Ensures contact wetting)

• Maximum Switching Voltage 250 Vac / 250 Vdc

• Protection Logic Integrated individual channel fusing

• Mounting Configuration Standard DIN-rail carrier

• Physical Weight 0.75 kg (Net) / 2.0 kg (Shipping weight with packaging)

Industrial Application Scenarios

The FC-TSRO-08UNI is typically deployed in Emergency Shutdown (ESD) and Fire and Gas (F&G) systems where isolation between the safety system and field equipment is mandatory. Its ability to switch high-voltage AC loads makes it ideal for controlling local alarms, motorized valves, and power distribution circuits that operate outside the standard 24V DC logic range.

Technical FAQ

What is the significance of the 1 mA minimum current rating?

This is the minimum "wetting current" required to break through any oxidation on the relay contacts, ensuring long-term switching reliability for very low-power signaling applications.

Can the fuses be replaced without removing the wiring?

Yes, the FC-TSRO-08UNI is designed with accessible fuse holders, allowing for rapid maintenance and troubleshooting without disturbing the primary field termination points.

Does this module support both AC and DC output loads simultaneously?

While the module can handle either, it is a best practice to maintain voltage consistency across a single FTA to simplify cabinet safety labeling and prevent cross-talk.