Honeywell FS-TRO-1024 Relay Output Field Termination Assembly

The Honeywell FS-TRO-1024 is a 10-channel digital output Field Termination Assembly (FTA) designed for relay-contact signal wiring in Honeywell safety control systems. It provides the field wiring interface between the system interconnection cable and external circuits through screw terminals. The assembly supports DIN rail mounting and connects to compatible relay output modules through the specified interconnection cable.

Function and System Interface

The FS-TRO-1024 serves as a field termination point rather than a standalone relay output controller. It connects the system interconnection cable SIC-C-12 to external field wiring, allowing relay contact signals from compatible output modules to reach field devices.

The documented configuration supports ten output channels from a redundant pair of 10208/2/1 modules. This distinction is important when selecting replacement hardware: the FTA provides the termination and wiring interface, while the associated output modules perform the relay switching.

Relay Contact and Electrical Ratings

The FTA carries ten relay-contact circuits associated with the 10208/2/1 relay output modules. These are potential-free contact outputs, meaning the field circuit uses the relay contacts rather than receiving a generated 24 VDC output supply from the FTA.

The documented electrical limits include a maximum continuous current of 2 A per channel and maximum switched power of 100 W / 1000 VA. The contact material on the associated 10208/2/1 relay module is gold flash over silver-cadmium oxide.

Installation and Field Wiring

The FS-TRO-1024 uses a universal snap-in mounting arrangement for standard TS32 and TS35 x 7.5 DIN rails. External wiring connects through screw terminals, while the system-side connection uses the SIC-C-12 interconnection cable.

The specified terminal requirements are:

• Maximum wire diameter: 2.5 mm (AWG 14)
• Wire stripping length: 7 mm (0.28 in)
• Terminal tightening torque: 0.5 Nm (0.37 ft-lb)

Technical Specifications

Frequently Asked Questions

Q: Is the FS-TRO-1024 a standalone relay output module?

A: No. It is a Field Termination Assembly (FTA). It provides the field wiring interface for compatible 10208/2/1 relay output modules through the SIC-C-12 cable.

Q: How many relay output channels can the FS-TRO-1024 terminate?

A: It supports ten relay-contact channels. The documented configuration allows connection of the ten channels from a single 10208/2/1 module or a redundant pair of these modules.

Q: What should be checked before replacing an FS-TRO-1024?

A: Verify the ten-channel configuration, SIC-C-12 cable connection, associated 10208/2/1 output modules, DIN rail arrangement and terminal wiring requirements. The FTA should not be substituted directly with FS-RO-1024, which is a different relay output module.