Description
Core Product Summary
The Honeywell FTA-T-02 is a fail-safe digital output field termination assembly designed for Honeywell Fail Safe Control (FSC) systems. It connects system interconnection cables from the control-system side to external field wiring through screw terminals, providing a structured interface for 24 output channels.
The assembly divides its channels into six groups of four and includes six system interconnection cable connectors labeled 1A, 1B, 2A, 2B, 3A, and 3B. It supports the documented 24/48/60 VDC fail-safe output application and a maximum continuous current of 2 A per channel. The assembly mounts on standard TS32 or TS35 × 7.5 DIN rails.
The FTA-T-02 is a field termination assembly, not a standalone safety controller. Its suitability depends on the connected output module, system interconnection cables, field loads, and approved system wiring. Confirm the installed configuration and electrical ratings before replacement.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | FTA-T-02 |
| Product type | Fail-safe digital output Field Termination Assembly |
| System family | Honeywell Fail Safe Control (FSC) |
| Number of channels | 24 |
| Channel arrangement | 6 groups × 4 channels |
| Application | 24/48/60 VDC fail-safe digital output systems |
| Maximum continuous current | 2 A per channel |
| SIC connectors | 1A, 1B, 2A, 2B, 3A, 3B |
| Field termination | Screw terminals |
| Maximum wire size | 2.5 mm² (AWG 14) |
| Wire strip length | 7 mm |
| Terminal tightening torque | 0.5 Nm (0.37 ft-lb) |
| Maximum voltage, overvoltage category III | 36 VAC / 50 VDC |
| Maximum voltage, overvoltage category II | 125 VAC / 150 VDC |
| Dimensions (L × W × H) | 145 × 70 × 57 mm |
| DIN rail types | TS32 / TS35 × 7.5 |
| Required rail length | 146 mm |
| Documented approvals | CE, UL |
The maximum-voltage figures are specified under different overvoltage-category conditions in the manufacturer’s technical data. They should not be interpreted as permission to use the assembly at every listed voltage in every application.
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Engineering Selection Highlights
- 24-channel field interface: Connects the system interconnection cables to external field wiring.
- Six-group arrangement: Organizes 24 channels into six groups of four.
- Screw-terminal connections: Supports direct termination of field conductors within the documented wire-size range.
- DIN rail installation: Compatible with TS32 and TS35 × 7.5 rails.
- Defined current capacity: Supports up to 2 A continuous current per channel, subject to the applicable system and installation limits.
- Safety-system integration: Intended for compatible Honeywell FSC fail-safe output configurations.
- Documented terminal requirements: Specified strip length and tightening torque support consistent installation practices.
FTA-T-02
FTA-T-02
System Compatibility and Integration Requirements
| Integration area | What to verify |
|---|---|
| Honeywell FSC system | Confirm the installed system architecture and supported FTA configuration. |
| Output module | Verify the corresponding fail-safe digital output module. |
| System interconnection cables | Confirm cable type, connector layout, and channel mapping. |
| Field wiring | Check terminal assignments, conductor size, and polarity. |
| Field loads | Verify voltage, current, load type, and protection requirements. |
| DIN rail | Confirm TS32 or TS35 × 7.5 mounting compatibility and available space. |
| Electrical limits | Apply the correct voltage and overvoltage-category limits. |
| Safety configuration | Check the approved wiring diagrams and safety application documentation. |
The FTA-T-02 should not be treated as a universal terminal block or substituted for another FTA solely because the number of channels is similar. Compatibility depends on the system interconnection cable arrangement and the associated output hardware.
Dimensions, Mounting, and Connection Notes
Physical dimensions
145 × 70 × 57 mm
Length × width × height
Mounting
TS32 or TS35 × 7.5 DIN rail
Required rail length: 146 mm
Before installation:
- Confirm the correct FTA model and its associated output module.
- Verify the six SIC connectors and the system’s channel mapping.
- Use conductors no larger than 2.5 mm² (AWG 14), as specified.
- Strip conductors by 7 mm and tighten terminals to 0.5 Nm.
- Check voltage, current, and field-load requirements against the applicable system documentation.
- Follow the site’s approved isolation and safety-system maintenance procedures.
Detailed Product Overview
Field termination architecture
The FTA-T-02 provides 24 field connections arranged into six groups of four. Six SIC connectors link the assembly to the system interconnection cables. External field conductors terminate at screw terminals, allowing field wiring to be organized and maintained separately from the system-side cable connections.
Electrical capacity
The manufacturer’s data specifies a maximum continuous current of 2 A per channel. This rating must be assessed alongside the field-load characteristics, cable sizing, operating voltage, and requirements of the connected output module. The FTA’s published voltage limits also depend on the specified overvoltage category.
Mechanical installation
The assembly supports TS32 and TS35 × 7.5 DIN rails and requires approximately 146 mm of rail length. Its compact dimensions can simplify cabinet layout, but engineers should allow sufficient space for wiring access, cable bends, inspection, and maintenance.
Maintenance and troubleshooting
When an output circuit fails, inspect the relevant field wiring, terminal tightness, cable connections, and associated output-module diagnostics. Confirm the channel mapping before disturbing wiring. A problem observed at the FTA does not necessarily indicate that the assembly itself has failed; the fault may originate in the system interconnection cable, output module, field load, or external wiring.
Because the FTA forms part of a fail-safe control system, troubleshooting and replacement should follow approved site procedures. Do not bypass safety circuits or change channel assignments without authorization and appropriate functional checks.
Applications and System Role
The FTA-T-02 provides the field wiring interface for fail-safe digital output circuits in compatible Honeywell FSC installations. It organizes connections between the control-system interconnection cables and external devices.
Potential system applications include:
- Safety-related valve and actuator wiring
- Industrial process shutdown circuits
- Burner and equipment control systems
- Process plant output distribution
- Maintenance and replacement of legacy Honeywell FSC installations
The actual safety function is determined by the complete control system, output module, wiring design, and application logic—not by the termination assembly alone.
Frequently Asked Questions
Q1: What is the Honeywell FTA-T-02?
It is a 24-channel fail-safe digital output Field Termination Assembly for Honeywell FSC systems.
Q2: Is the FTA-T-02 a digital output module?
More precisely, it is the field termination assembly that interfaces system interconnection cables with external field wiring. It works with the appropriate output hardware.
Q3: How many channels does it support?
It supports 24 channels arranged in six groups of four.
Q4: What is the maximum continuous current per channel?
The documented maximum is 2 A per channel. Confirm the connected output module, field-load requirements, and applicable installation limits.
Q5: Which DIN rails are supported?
The FTA-T-02 is specified for TS32 and TS35 × 7.5 DIN rails, with a required rail length of 146 mm.
Q6: What wire size and terminal torque are specified?
The maximum wire size is 2.5 mm² (AWG 14), the strip length is 7 mm, and the terminal tightening torque is 0.5 Nm.
Q7: Can it replace another Honeywell FTA with 24 channels?
Not automatically. Confirm the SIC connectors, channel arrangement, output-module compatibility, terminal wiring, and electrical requirements before substitution.
Q8: What information is needed for a replacement quotation?
Provide the complete model number, nameplate photograph, required quantity, condition preference, and details of the installed Honeywell FSC system.
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