Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | FTA-T-14 |
| Product Family | Honeywell FSC |
| Product Type | Fail-safe analog input FTA |
| Input Channels | 16 |
| Channel Arrangement | 2 groups of 8 |
| Field Signal | 0(4)-20 mA DC |
| Specified Input Current | 0–25 mA |
| Input Resistance | 250 Ω ±1% |
| External Supply | 30 VDC |
| External Supply Current | Approx. 3 mA, excluding loop loads |
| Passive Transmitter Output Resistance | 270 Ω ±5% |
| Passive Transmitter Current | <120 mA/channel at 30 VDC |
| Output to 10105/2/1 | 0–4 VDC |
| Fuse | 315 mA slow-acting |
| Fuse Quantity | One fuse per 8 channels |
| Dimensions | 200 × 70 × 60 mm |
| DIN Rail | TS32 / TS35 × 7.5 |
| Used Rail Length | 201 mm |
| Maximum Wire Size | 2.5 mm² / AWG 14 |
| Terminal Tightening Torque | 0.5 Nm |
| System Interface | SIC connector |
| Hazardous Area Application | Class I, Division 2 |
| Hydrogen Loop Limit | 6 mH / 0.25 µF |
| Non-Hydrogen Loop Limit | 20 mH / 5 µF |
The 200 × 70 × 60 mm dimensions, 315 mA fusing, 250 Ω input resistance, 30 VDC external supply and field-signal limits come from the FTA-T-14 technical data sheet reproduced in the FSC hardware documentation.
Product Introduction
Honeywell FTA-T-14 Fail-Safe Analog Input FTA
The Honeywell FTA-T-14 is a 16-channel field termination assembly designed for 0(4)-20 mA analog signals in Honeywell FSC installations. It provides the interface between field transmitters and the 10105/2/1 high-density analog input module, while also handling transmitter power distribution and signal conversion.
Its design supports both active and passive transmitters. For passive loops, the FTA-T-14 can distribute current-limited transmitter power, while the two eight-channel groups provide separate fuse protection. This makes the board more than a simple terminal strip.
FTA-T-21
Application Scenarios & Field Pitfalls
Engineering Pain Point
With older FSC installations, a failed analog-input channel can initially look like a transmitter or wiring problem. The FTA-T-14 sits between the field device and the actual FSC analog input module, so the fault can originate in the transmitter loop, FTA fuse, external 30 VDC supply, SIC connection, or 10105/2/1 input path.
The documentation explicitly provides separate monitoring of externally supplied power and identifies the FTA-T-15 DC/DC converter as an associated power option for passive transmitters.
Typical Applications
- Process transmitters: Pressure, temperature, flow, level and other 4–20 mA instrumentation.
- Safety instrumented systems: Analog process measurements requiring FSC fail-safe input processing.
- Hazardous-area instrumentation: The documented design supports Class I, Division 2 applications.
- Legacy Honeywell FSC systems: Direct field termination for the 10105/2/1 high-density analog input architecture.
Technical Pitfalls to Avoid
- Do not confuse with a standalone analog input card.
It is the field termination/interface assembly. The associated high-density analog input electronics are in the 10105/2/1 module. - Check the 16-channel grouping.
The sixteen channels are divided into two groups of eight with common 0 V. Each group has its own 315 mA fuse. A fault affecting several channels in one group therefore deserves immediate fuse and external-supply inspection. - Verify active versus passive transmitters.
Active 4–20 mA transmitters do not require the same external power arrangement as passive transmitters. The can support both configurations, but the wiring arrangement is different. - Do not substitute a different FTA-T model by channel count alone.
Honeywell’s FSC documentation distinguishes FTA-T-13 as a current-limited 24 VDC digital-input FTA, as the 16-channel analog-input FTA, and FTA-T-15 as a 24-to-30 VDC converter. Their functions are fundamentally different. - Check hazardous-area loop parameters.
The published data specifies maximum loop inductance and capacitance values that differ between hydrogen and non-hydrogen applications. Do not change the field interface without checking the approved installation design.
Related Products
- 10105/2/1 — High-density fail-safe analog input module receiving the converted signals from the . It is the electronic input module; is the field termination/interface assembly.
- FTA-T-15 — 24 VDC-to-30 VDC/1 A converter used to provide power for passive transmitter loops. One FTA-T-15 can supply up to two assemblies according to the FSC application documentation.
- FTA-T-13 — 16-channel current-limited digital input FTA for 24 VDC discrete signals. Same general FSC FTA family, but not suitable for 4–20 mA analog measurement.
- FTA-T-16 — Fail-safe active digital input FTA with line monitoring and 16 channels. It handles discrete signals rather than the analog 0(4)-20 mA signals of .
- FTA-T-09 — Fail-safe passive digital input FTA for 115 VAC/DC applications. Its signal type and electrical interface differ substantially from .
- FTA-T-08 — Fail-safe relay digital-output FTA. It belongs to the same FSC termination family but serves output circuits rather than analog inputs.
Procurement note: Specify Honeywell , 16-channel fail-safe 0(4)-20 mA analog input FTA. For a field replacement, verify the connected 10105/2/1 module, SIC cable type, transmitter configuration, external 30 VDC arrangement, fuse condition, and cabinet wiring. The is a legacy FSC interface component; treating it as a generic 16-channel analog terminal board is likely to cause commissioning problems.
