Overview
Configured for serial data communication in a Honeywell control system, the Honeywell FC-DCOM-232/485 (FS-DCOM-232/485 DCOM-232/485 Communication Interface Module) provides one RS232 output and two RS485/422 outputs. The module operates from a 5 VDC supply and supports serial interfaces up to 250 kBaud.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | FC-DCOM-232/485 |
| Spare Model | FS-DCOM-232/485 DCOM-232/485 |
| Product Type | Communication Interface Module |
| Brand | Honeywell |
| Origin | USA |
| Weight | 0.15 kg |
| Dimensions | 11 x 7 x 6 cm estimated shipping size |
| Input Voltage | 5 VDC +/-5% |
| Power Consumption | Max 2.5 W at 500 mA and 5 VDC |
| Input Current | Max 500 mA |
| RS232 Output Ports | 1 |
| RS232 Electrical Standard | EIA/TIA-232 levels |
| RS232 Baud Rate | 0-250 kBaud |
| RS485/422 Output Ports | 2 |
| RS485/422 Electrical Standard | EIA/TIA-485-A levels |
| Tariff Code | 8537101190 |
| Place of Shipment | Xiamen, China |
Serial Communication Interface Characteristics
The FC-DCOM-232/485 separates serial communication interfaces according to their electrical signaling standards. The RS232 port uses EIA/TIA-232 signal levels, while the two RS485/422 outputs use EIA/TIA-485-A levels.
The module accepts a nominal 5 VDC supply with a +/-5% tolerance. It can draw up to 500 mA, corresponding to a maximum calculated electrical input of 2.5 W. The RS232 interface supports communication rates from 0 to 250 kBaud.
For field wiring, maintain appropriate separation between serial communication conductors and high-current or high-voltage wiring. Use suitable shielded communication cable where the installation environment requires additional noise control. Connect cable shields according to the grounding practice defined for the host control system.
Frequently Asked Questions
Q: What serial interfaces does the FC-DCOM-232/485 provide?
A: It provides one RS232 output port and two RS485/422 output ports.
Q: What supply voltage does the module require?
A: The module requires 5 VDC +/-5% and has a maximum input current of 500 mA.
Q: What is the maximum specified RS232 communication rate?
A: The specified RS232 baud-rate range extends to 250 kBaud.
Field Installation Guidelines
- Verify the module model and wiring assignment before installation.
- Supply the module with a regulated 5 VDC source within the specified +/-5% tolerance.
- Keep RS232 and RS485/422 communication cables separated from power and high-current conductors.
- Follow the host system wiring documentation for RS232, RS485, and RS422 terminal assignments.
- Use shielded communication cable when required by the site electromagnetic environment.
- Apply cable shielding and grounding at the designated system grounding point to avoid unintended ground paths.
- Confirm signal polarity and conductor identification for RS485/422 connections before energizing the circuit.
- Verify the configured baud rate and serial communication parameters at the connected equipment before commissioning.
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