Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product model | FC-USI-0002 |
| Manufacturer | Honeywell |
| System family | Safety Manager |
| Product type | Universal Safety Interface module |
| Primary function | External Ethernet and serial communication |
| Installation location | Safety Manager controller chassis |
| Supply voltage | 5 VDC ±5% |
| Maximum supply current | 1.2 A |
| Operating temperature | -5 to +70 °C |
| Storage temperature | -40 to +85 °C |
| Relative humidity | 10–95%, non-condensing |
| Dimensions (H × W × D) | 176 × 35.2 × 212 mm |
| Weight | Approximately 0.7 kg |
| Communication | Ethernet and serial interfaces |
| Protocol support | Application-dependent; EUCN is supported by the USI-0002 family |
| Lifecycle status | Discontinued |
The electrical and mechanical values are published for the USI-0002 hardware family. The precise port arrangement and interface configuration should be checked against the module revision and Safety Manager hardware documentation.
Product Introduction
The Honeywell FC-USI-0002 is a Universal Safety Interface module designed for the Safety Manager safety system. It provides communication between the safety controller and external devices or supervisory systems, including supported connections to Experion PKS and Safety Builder. Its communication functions allow external systems to exchange designated information with the safety controller without replacing the safety logic processing function.
The module operates from the controller’s 5 VDC backplane supply and installs in the Safety Manager controller chassis. It is a communication component, not a standalone safety controller or general-purpose Ethernet switch. Its replacement requires attention to system software revision, module configuration, and communication settings.
FC-USI-0002
Application Scenarios & Field Pitfalls
In a safety-instrumented installation, the USI module provides the communication path between the Safety Manager and approved external systems. Typical data exchange can include system status, diagnostics, and designated interface information. The module’s role is communication; safety logic execution and safety I/O processing remain functions of the Safety Manager architecture.
Typical application areas
- Process plants: Communication between Safety Manager and supervisory systems for safety-system status and diagnostics.
- Oil and gas facilities: Interface between safety controllers and approved external engineering or monitoring systems.
- Chemical processing: Exchange of designated safety-system information with plant-level control and monitoring systems.
- Power generation: Communication between safety-system controllers and external supervisory or engineering environments.
Field pitfalls
1. Check the Safety Manager software revision before selecting a replacement. Honeywell identifies FX-USI-0002 as the replacement for FC-USI-0002, but FX- requires Safety Manager software R140.1 or later. Earlier software releases do not support the replacement.
2. Do not assume every communication port has identical functionality. Verify the Ethernet and serial port assignments, protocol configuration, network addressing, and connected-system requirements against the existing project.
3. Confirm the module’s power and chassis compatibility. The module requires 5 VDC ±5% with a maximum current draw of 1.2 A. Check the controller chassis and power supply loading before installation.
4. Treat online replacement as a controlled safety-system activity. Honeywell documentation describes FX- as capable of replacing FC- online under supported conditions. This does not remove the need for approved site procedures, configuration checks, and post-replacement communication diagnostics.
Related Products
- FC-USI-0001 — Earlier Universal Safety Interface model; also superseded by the newer replacement path.
- FE- — Intermediate Universal Safety Interface replacement for FC-USI-0001 and FC-.
- FX- — Current documented replacement type for FC-; pin-to-pin and function-compatible when the Safety Manager software is R140.1 or later.
- Safety Manager Controller — Host safety-control platform in which the USI module is installed.
- Experion PKS — Honeywell process control system that can exchange supported information with the Safety Manager through the USI communication interface.
- Safety Builder — Engineering environment used for Safety Manager configuration and maintenance.
The documented replacement sequence is FC- → FE- → FX-. For a migration, verify the installed Safety Manager software release and the configured USI module type before substituting hardware.
Procurement note: FC- is a legacy discontinued part. If sourcing original stock, confirm the exact model marking and revision. If considering FX- as a replacement, first establish that the Safety Manager system runs R140.1 or later and validate the configuration through the approved system engineering process.
