Description
Honeywell FC-TSAI-1620M | 16-Channel Analog Input FTA | Safety Manager
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model | FC-TSAI-1620M |
| Product Type | Safe Analog Input Field Termination Assembly |
| System | Honeywell Safety Manager |
| Input Channels | 16 |
| Channel Arrangement | 2 groups of 8 |
| Common Reference | Common 0 V per group |
| Supported Signal | 0(4)–20 mA |
| Specified Input Current | 0–25 mA |
| Input Resistance | 250 Ω ±1% |
| External Power | 30 VDC |
| Base FTA Consumption | 3 mA, excluding input loop loads |
| Passive Transmitter Output Resistance | 270 Ω ±5% |
| Maximum Igniting Current | <120 mA/channel at 30 VDC |
| Output to SAI-1620m | 0–4 VDC |
| Output Accuracy | 0.10% |
| Fuse | 315 mA slow-acting |
| Fuse Size | 5 × 20 mm |
| Mounting Rail | TS32 / TS35 × 7.5 |
| Dimensions | 210 × 70 × 60 mm |
| Maximum Wire Size | 2.5 mm² / AWG 14 |
| Terminal Strip Length | 7 mm |
| Tightening Torque | 0.5 Nm |
| Coating | Conformal coated |
| Approvals | CE, TÜV, UL, CSA, FM |
Honeywell specifies the FC/FS TSAI-1620m family as a 16-channel FTA, with two groups of eight inputs sharing a common 0 V. The FTA accepts 0–25 mA, uses a 250 Ω input resistance, and provides a conditioned 0–4 VDC signal to the SAI-1620m module.
The physical dimensions are 210 × 70 × 60 mm, with TS32 or TS35 × 7.5 DIN-rail mounting. Honeywell also specifies 315 mA slow-acting fuses and screw terminals accepting wire up to 2.5 mm².
Product Introduction
The Honeywell FC-TSAI-1620M is a 16-channel safe analog input Field Termination Assembly (FTA) for the Honeywell Safety Manager platform. Its job is to provide the field-side termination, signal conditioning, transmitter power interface, and protection needed to connect 0(4)–20 mA process signals to the SAI-1620m Safety High-Density Analog Input Module.
The FC designation matters during replacement because Honeywell distinguishes FC modules from FS modules by coating: FC versions are conformally coated, while FS versions are non-conformally coated. Honeywell’s certification/revision documentation specifically lists FC-TSAI-1620M as the conformal-coated 16-channel safe analog input FTA.
FC-TSAI-1620M
Application Scenarios & Field Pitfalls — Engineer’s Perspective
Engineering Pain Point
An FTA fault can easily be mistaken for an SAI-1620m module failure because both participate in the same analog acquisition path. Before replacing the SAI module, check the FC-TSAI-1620M fuse condition, field loop current, transmitter power, terminal wiring, interconnect cable, and the FTA-to-SAI interface.
Typical Applications
- Honeywell Safety Manager safety-system cabinets
- 0(4)–20 mA process transmitter termination
- Safety-related analog measurement loops
- Class I Zone 2 field instrumentation interfaces
- Remote process transmitters connected to SAI-1620m high-density analog input modules
Honeywell documentation describes the TSAI-1620m as the interface between field components and the SAI-1620m Safety High-Density Analog Input Module, and states that it can be used for signals from Class I Zone 2 hazardous locations.
Technical Pitfalls to Avoid
- Do not call FC-TSAI-1620M the analog input processor itself.
It is an FTA. The actual Safety Manager analog input module is the SAI-1620m. The FTA performs the field termination and signal-interface functions between the transmitter wiring and SAI module. - Do not substitute FS- solely because the electrical model number looks similar.
Honeywell identifies FS- as the non-conformal-coated version and FC- as the conformal-coated version. In a cabinet where environmental protection is part of the original design, the coating designation is a procurement requirement, not cosmetic information. - Check the SAI-1620m interface and SICC cable.
The 16 channels are arranged in two groups of eight and connect through the system interconnect cable to the SAI-side architecture. A damaged or incorrectly matched interconnect can produce multiple simultaneous channel faults that look like an FTA failure. - Do not use generic 4–20 mA module specifications from reseller pages.
Some online listings incorrectly describe FC- as a standalone analog module with Modbus RTU, 9–36 VDC supply, or 0–10 V inputs. Those specifications conflict with Honeywell’s Safety Manager hardware reference and should not be used for engineering or procurement.
Related Products
- Honeywell SAI-1620m — Safety High-Density Analog Input Module receiving the conditioned signals from the TSAI-1620m FTA.
- — Non-conformal-coated version of the same 16-channel safe 0(4)–20 mA FTA.
- Honeywell FC-TSAI-0410 — Conformal-coated four-channel safe analog input FTA.
- Honeywell FS-TSAI-0410 — Non-conformal-coated four-channel safe analog input FTA.
- Honeywell FC-TSHART-1620M — Conformal-coated 16-channel safe analog input FTA with HART interface.
- Honeywell FS-TSHART-1620M — Non-conformal-coated HART version.
- Honeywell FC-TSAIOP-1620M — Conformal-coated 16-channel safe analog input FTA variant.
- Honeywell SAI-0410 — Related Safety Manager analog input module for lower channel-count applications.
- Honeywell Safety Manager — Safety-system platform in which the TSAI-1620m FTA is used.
Honeywell’s TÜV revision documentation distinguishes the standard , TSAIOP-1620M, and TSHART-1620M families, so these should not be treated as interchangeable FTA variants without checking the installed Safety Manager configuration.
Procurement Check
Before approving a replacement, verify:
- Exact designation:
- TSAI-1620m family
- Conformal-coated FC version
- Safety Manager system generation
- Companion SAI-1620m module
- 16-channel configuration
- 0(4)–20 mA signal requirement
- Two groups of eight channels
- Common 0 V arrangement
- External 30 VDC supply
- Field transmitter wiring
- FTA fuse condition and rating
- System interconnect cable
- DIN-rail arrangement
- Hazardous-area certification requirements
- Hardware revision and certification marking
Recommended procurement description:
Honeywell FC- TSAI-1620m Safe Analog Input Field Termination Assembly, 16-Channel 0(4)–20 mA, Conformal-Coated, Safety Manager, for SAI-1620m High-Density Analog Input Module.
The important distinction is simple: FC- is a Safety Manager field termination assembly, not the SAI-1620m analog input processor. The FC coating designation, 16-channel architecture, 0(4)–20 mA signal range, companion SAI-1620m module, and field wiring configuration should all be matched before replacement.
