Honeywell FC-DCOM-485 RS-485 Communication Interface Module
The Honeywell FC-DCOM-485 V1.1, also cataloged as the FC-DCOM-485 RS-485 Communication Interface Module, operates as a dedicated hardware component for serial data transmission within Honeywell Safety Manager system networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FC-DCOM-485 (V1.1) |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.2 kg |
| Dimensions | Approximately 110 × 70 × 61 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 backplane) |
| Communication Standard | RS-485 / RS-422 (EIA/TIA-485-A) |
| Maximum Baud Rate | Up to 2 Mbaud |
| Transmission Modes | Transparent, Manchester, FM0, FM1 |
| Field Connection | 9-pin D-sub connectors |
| Mounting Type | DIN rail mounting (TS32 / TS35 × 7.5, rail length ~117 mm) |
Process Control Signal Integration and Isolation Architecture
The module executes serial data communication across industrial control loops utilizing robust EIA/TIA-485-A electrical signal levels supporting up to 2 Mbaud transmission rates. Channel-to-channel isolation and galvanic separation provisions protect internal control processor backplanes against common-mode voltage spikes and electromagnetic noise interference. Furthermore, integrated encoding flexibility (Manchester, FM0, and FM1) ensures reliable frame synchronization across distributed safety-system communication links.
Frequently Asked Questions
Q: What is the power source and current consumption profile for the FC-DCOM-485 module?
A: The module is powered directly by the control processor backplane, operating at 5 VDC ±5% with a maximum input current draw of 500 mA.
Q: What physical connectors and mounting standards are utilized by this interface unit?
A: Field connections are established via 9-pin D-sub connectors, and the unit mounts on standard TS32 or TS35 × 7.5 DIN rails requiring a rail length of approximately 117 mm.
Q: What transmission speeds and modes does the communication interface support?
A: It supports serial baud rates up to 2 Mbaud with transparent transmission alongside selectable Manchester, FM0, and FM1 encoding formats.
Field Installation Guidelines
- Ensure that control processor backplane power rails are fully de-energized before mounting or dismounting the interface module on the DIN rail.
- Secure the unit onto a compatible TS32 or TS35 × 7.5 DIN rail, verifying that the approximate 117 mm rail clearance is maintained without mechanical binding.
- Connect serial communication cables through the 9-pin D-sub interface, ensuring proper shielding and grounding to prevent noise injection across high-speed loops.
- Verify input voltage stability at 5 VDC ±5% prior to initiating system communication handshakes and data polling.
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