Description
Core Product Summary (Brand / Model / Key Attributes)
The Honeywell FTA-T-21 is a digital input Field Termination Assembly (FTA) used in Honeywell industrial control and safety systems. It provides the interface between system interconnection cables and external field wiring for discrete (on/off) input signals.
The module is commonly described as supporting 16 digital input channels and is rated for higher-voltage signals in the range of 125 VAC / 150 VDC. It belongs to the FTA-T series of field termination assemblies associated with Honeywell FSC / Safety Manager related architectures. Public technical documentation for this exact model is limited; exact channel grouping, isolation details, and environmental ratings should be confirmed against the official system hardware manual for the installed revision.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Digital Input Field Termination Assembly (FTA) |
| Model | FTA-T-21 |
| Manufacturer | Honeywell |
| Function | Discrete / digital input interface |
| Typical Channel Count | 16 channels (commonly listed) |
| Typical Input Voltage | 125 VAC / 150 VDC (commonly listed) |
| System Context | Honeywell FSC / Safety Manager related systems |
| Mounting | DIN-rail or panel style consistent with FTA-T series |
Note: Detailed electrical ratings, isolation values, fuse ratings, and exact channel configuration are not consistently documented in publicly available primary sources for the FTA-T-21. Always verify against the official Honeywell hardware documentation applicable to the system revision.
Detailed Product Overview
The Honeywell FTA-T-21 serves as a Field Termination Assembly that connects discrete field devices (switches, contacts, proximity sensors, etc.) to the control or safety system’s input modules. It provides convenient field terminal connections and the necessary signal interfacing for digital input signals.
Within the FTA-T series, modules are designed to match specific input or output module types in Honeywell fail-safe and process-control architectures. The FTA-T-21 is repeatedly identified in industrial spare-parts listings as a digital input FTA capable of handling 125 VAC / 150 VDC level signals across 16 channels.
Because comprehensive official datasheets for the FTA-T-21 are not widely published, engineers should treat secondary specifications as indicative only and confirm all electrical, mechanical, and safety parameters with the relevant Honeywell system manuals before design, procurement, or installation.
Engineering Selection Highlights
- Digital input FTA interface → connects discrete field contacts and sensors to the control system.
- Commonly listed 16-channel configuration → supports medium-density discrete input applications.
- Higher-voltage capability (125 VAC / 150 VDC range) → suitable for certain industrial discrete signal levels.
- FTA-T series form factor → consistent mounting and wiring practice with other Honeywell field termination assemblies.
- Used in FSC / Safety Manager related systems → aligns with legacy and safety-oriented Honeywell architectures.
FTA-T-21
FTA-T-21
Dimensions, Mounting & Connection Notes
- Mounting: Typically DIN-rail or panel style consistent with the FTA-T series
- Field connections: Screw or compression terminals (exact type depends on revision)
- System interface: Via system interconnection cables to the associated input modules
Exact dimensions, terminal layouts, fuse details, and mounting instructions must be taken from the official Honeywell documentation for the FTA-T-21 revision in use.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host System | Honeywell FSC / Safety Manager related systems | Confirm exact system generation and I/O module pairing |
| Signal Type | Discrete / digital inputs | Switches, contacts, and similar field devices |
| Field Wiring | Terminal connections on the FTA | Follow system wiring diagrams for correct grouping and polarity |
| Documentation | Official Honeywell hardware manuals | Required for exact ratings, pin-outs, and installation rules |
FAQ
What is the Honeywell FTA-T-21?
It is a digital input Field Termination Assembly used to interface discrete field signals with Honeywell control and safety systems.
How many channels does it typically support?
Secondary sources commonly list 16 digital input channels.
What input voltage range is associated with this module?
It is frequently described as supporting 125 VAC / 150 VDC signals.
Is detailed technical data readily available?
Publicly available detailed specifications for the FTA-T-21 are limited. Always consult the official Honeywell system hardware documentation for channel configuration, isolation, voltage/current limits, and environmental ratings.
How should the module be specified?
Use the full model designation FTA-T-21 together with the system revision and any applicable part number to ensure correct hardware matching.
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