Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | FC-TSRO-0824 |
| Manufacturer | Honeywell |
| Product Type | Digital output relay FTA |
| Assembly Variant | Conformal-coated |
| Number of Output Channels | 8 |
| Nominal Input Voltage | 24 VDC |
| Maximum Input Voltage | 36 VDC |
| Relay Pickup Voltage | 19.2 VDC |
| Typical Input Current | 40 mA at 24 VDC |
| Maximum Output Current | 5 A, fused |
| Minimum Output Current | 1 mA at 5 V |
| Maximum Output Voltage | 250 VAC / 250 VDC |
| Maximum Switched Load | 1,250 VA / 150 W, subject to load conditions |
| Fuse Rating | 5 A |
| Fuse Size | 5 × 20 mm |
| Fuse Manufacturer / Part | Schurter 0001.2511 |
| Safety Capability | Up to and including SIL 3, subject to approved system configuration |
| Approvals | CE, UL, TÜV, CSA |
| Dimensions | 300 × 70 × 60 mm |
| Mounting | TS32 / TS35 × 7.5 DIN rail |
| Maximum Wire Size | 2.5 mm² / AWG 14 |
| Operating Temperature | -5°C to +60°C |
Specifications are taken from Honeywell TSRO-0824 hardware documentation. The listed electrical ratings are family-level specifications; confirm the exact FC revision, load type, and installation conditions before applying them to a replacement.
Product Introduction
Honeywell FC-TSRO-0824 Relay Output Field Termination Assembly
The Honeywell FC-TSRO-0824 is an eight-channel relay output termination assembly designed for safety-system field interfaces. It connects the system interconnection cable to external wiring and provides relay contacts for switching field loads. Its conformal-coated construction distinguishes it from the standard FS-TSRO-0824 version.
FC-TSRO-0824
For maintenance teams, the key considerations are relay contact ratings, individual channel fusing, field-load characteristics, and compatibility with the installed safety-system architecture. It is a termination assembly, not a standalone safety controller or general-purpose PLC output card.
Application Scenarios & Field Pitfalls
The FC-TSRO-0824 is used where safety-system output signals must operate external equipment through relay contacts. Typical field problems include incorrect load selection, blown channel fuses, mismatched termination hardware, and replacement with an output assembly that has a different electrical interface. These errors can interrupt critical shutdown or equipment-control functions.
Typical applications
- Safety shutdown circuits: Relay switching for compatible safety-system output functions.
- Industrial equipment interlocking: Interfaces safety-system commands with external electrical circuits.
- Process isolation systems: Supports relay-based control of compatible actuators and auxiliary equipment.
- Harsh industrial installations: The conformal-coated FC version is intended for environments where additional board-level protection is required.
Engineering checks before installation
- Confirm the exact assembly variant. FC- is the conformal-coated version. Do not substitute FS- without checking the environmental and hardware requirements.
- Verify relay load ratings. The 5 A rating is not a universal rating for every load. Check AC versus DC switching, inrush current, inductive-load suppression, and the specified load curve.
- Inspect channel fuses. Confirm fuse rating and type before replacement. Do not install a higher-rated fuse to overcome repeated fuse failures.
- Check system and cable compatibility. Verify the system interconnection cable, termination arrangement, and safety-system configuration against the installed hardware.
- Do not assume SIL 3 from the part number alone. The family is documented for applications up to SIL 3, but the achieved safety integrity depends on the complete approved architecture, diagnostics, application design, and validation.
- Check the connected field circuit before energizing. Confirm terminal assignments, external supply voltage, grounding, and isolation requirements.
Honeywell documentation identifies the eight-channel relay FTA and its SIL 3 application capability. The conformal-coated FC variant is separately identified in the product and certification records.
Related Products
The following Honeywell assemblies have related safety-system termination functions. They are comparison references, not guaranteed direct replacements.
| Model | Function Difference | Potential Use |
|---|---|---|
| FS- | Standard, non-FC version of the eight-channel relay FTA | Applications not requiring the FC conformal-coated variant |
| FC-TSRO-08UNI | Eight-channel relay output FTA with common power arrangement | Applications designed for the common-power configuration |
| FC-TRO-0824 | Eight-channel relay-contact digital output termination assembly | Compatible relay output applications requiring a different FTA design |
| FC-TSDO-0824 | Eight-channel 24 VDC fail-safe digital output FTA, not a relay-contact equivalent | Solid-state safety output applications |
| FC-TSDO-0824C | Current-limited 24 VDC digital output FTA | Applications requiring current-limited solid-state outputs |
| FC-TSDI-1624C | Sixteen-channel current-limited digital input FTA | Safety-system input signal termination |
| FC-TSDI-16UNI | Sixteen-channel universal fail-safe digital input FTA | Compatible universal digital input applications |
Honeywell’s FTA model listings distinguish relay outputs from solid-state fail-safe outputs and digital inputs. Selection must follow the original I/O design rather than channel count alone.
Procurement note: When requesting the FC-, specify the complete part number and confirm the conformal-coated version. Ask for photographs of the product label, terminal side, and revision markings. For safety-related service, also verify hardware revision, certification documentation, storage history, and functional test records before installation.
