FS-TRO-1024

The Honeywell FS-TRO-1024, also cataloged as the FS-TRO-1024 digital output relay contact field termination assembly (FTA), provides the electrical interface between the SIC-C-12 system interconnection cable and external field wiring. It connects ten output channels from a 10208/2/1 digital output module or redundant module pair to field circuits through screw terminals. The assembly supports standard DIN EN rail mounting and provides relay contact circuit termination.

Hardware Specifications

Parameter	Specification
Model	FS-TRO-1024
Brand	Honeywell
Product Type	Digital Output Relay Contact Field Termination Assembly
Dimensions	60 x 70 x 54 mm
Number of Channels	10
Maximum Voltage	36 VAC / 50 VDC
Maximum Switched Power	100 W / 1000 VA
Maximum Continuous Current	2 A per channel
System Interface	SIC-C-12 system interconnection cable
Compatible Output Module	10208/2/1
Field Termination	Screw terminals
Maximum Wire Cross-Section	2.5 mm2 (AWG 14)
Wire Stripping Length	7 mm
Terminal Tightening Torque	0.5 Nm
DIN Rail Compatibility	TS32 / TS35 x 7.5
Required Rail Length	61 mm
Overvoltage Category	Category III, according to the supplied IEC 1010 (1990) reference
Approvals	CE; UL approval pending in the supplied documentation

Relay Output Interface and Electrical Limits

The FS-TRO-1024 routes ten digital output channels from the 10208/2/1 module through the SIC-C-12 interconnection cable to field wiring terminals. The connected output module provides the relay contacts; the FTA serves as the field wiring termination interface.

Each channel supports a maximum continuous current of 2 A. The documented maximum switching limits are 36 VAC or 50 VDC and 100 W / 1000 VA. These ratings must be considered together with the connected load characteristics and the output module's contact specifications.

The documentation identifies gold-flush silver-cadmium oxide as the contact material on the 10208/2/1 module. This material specification refers to the output module contacts, not the FS-TRO-1024 terminal assembly itself.

Frequently Asked Questions (FAQ)

Q: Can the FS-TRO-1024 support a redundant pair of 10208/2/1 modules?

A: Yes. The supplied documentation states that the ten channels of a redundant pair of 10208/2/1 modules can be connected to the FTA through the SIC-C-12 cable. The actual redundancy arrangement and switching behavior depend on the system configuration.

Q: What are the electrical limits of the field wiring connections?

A: The documented maximum voltage is 36 VAC or 50 VDC, with a maximum switched power of 100 W / 1000 VA and a maximum continuous current of 2 A per channel. The connected load must remain within the applicable voltage, current, and switching limits.

Q: Which wire sizes and DIN rails are supported?

A: The screw terminals accept conductors up to 2.5 mm2 (AWG 14), with a specified stripping length of 7 mm and tightening torque of 0.5 Nm. Mounting is supported on TS32 and TS35 x 7.5 DIN EN rails, requiring 61 mm of rail length.

Field Installation Guidelines

• DIN rail mounting: Install the FTA on a compatible TS32 or TS35 x 7.5 rail. Allow sufficient clearance for terminal access and cable routing.
• System cable connection: Connect the SIC-C-12 cable according to the applicable system wiring diagram and the manufacturer's SIC-to-FTA application documentation.
• Field wiring: Use conductors with a cross-section no greater than 2.5 mm2. Strip 7 mm of insulation and tighten terminal screws to 0.5 Nm.
• Electrical load verification: Confirm that field circuit voltage, continuous current, and switching power remain within the documented limits. Check AC and DC load characteristics before energizing the circuit.
• Grounding and shielding: Follow the system grounding design and cable shielding requirements. Do not assume that the FTA provides galvanic isolation or a dedicated shield termination without confirmation from the connection documentation.
• Commissioning: Verify terminal assignments, cable continuity, output channel mapping, and field load operation before placing the connected system into service.

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