Honeywell FC-DCOM-232/485 Communication Interface Module
The Honeywell FC-DCOM-232/485, also cataloged as the FC-DCOM-232/485 Serial Communication Interface FTA, operates as a dedicated hardware component for multi-standard serial data transmission within Honeywell Safety Manager system networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FC-DCOM-232/485 |
| Brand | Honeywell |
| Origin | Manufacturer Standard Facility |
| Weight | 0.449 kg |
| Dimensions | 110 × 70 × 61 mm (Terminal Dimensions: 6 × 57 × 47 mm) |
| Operating Temp | Standard industrial cabinet ratings (0 deg C to 60 deg C typical) |
| Power Consumption | Maximum input current 500 mA (5 VDC ±5% from control processor) |
| Communication Interfaces | RS-232 (EIA/TIA-232) and RS-485/RS-422 (EIA/TIA-485-A) |
| Baud Rate Support | RS-232 up to 250 kBaud; RS-485/RS-422 up to 2 MBaud |
| Transmission Modes | Transparent, FM0, FM1, Manchester encoding |
| Mounting Type | DIN rail mounting (TS32 / TS35 × 7.5, required rail length 117 mm) |
Process Control Signal Integration and Isolation Architecture
The module executes protocol bridging and serial communication processing by supporting both single-ended RS-232 and differential RS-485/RS-422 electrical standards. Galvanic and optical isolation provisions protect internal control processor backplanes against common-mode voltage surges and ground loops across long-distance serial lines. Furthermore, selectable transmission modes and high-speed encoding formats (Manchester, FM0, and FM1) guarantee deterministic frame synchronization and noise suppression across industrial field devices.
Frequently Asked Questions
Q: What is the power source and current requirement for the FC-DCOM-232/485 module?
A: The unit is powered directly by the Honeywell Safety Manager Control Processor, operating at 5 VDC ±5% with a maximum input current draw of 500 mA.
Q: What baud rates are supported across the dual communication interfaces?
A: The RS-232 interface supports speeds up to 250 kBaud, while the RS-485/RS-422 interface supports high-speed data transmission up to 2 MBaud.
Q: What are the physical mounting and rail length requirements for this interface?
A: The module measures 110 × 70 × 61 mm and installs on standard TS32 or TS35 × 7.5 DIN rails requiring an exact rail length of 117 mm.
Field Installation Guidelines
- Ensure that control processor power rails are fully de-energized before mounting or dismounting the interface module on the DIN rail.
- Secure the module onto a compatible TS32 or TS35 × 7.5 DIN rail, verifying that the 117 mm rail clearance is maintained without mechanical binding.
- Terminate serial communication cables using proper shielding and grounding practices to prevent electromagnetic interference across high-speed RS-232 and RS-485 links.
- Verify that input operating voltage is stabilized at 5 VDC ±5% before initiating system communication polling.
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