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Honeywell FC-DCOM-232/485 Serial Communication Field Termination Assembly

The Honeywell FC-DCOM-232/485, also cataloged as the FC-DCOM-232/485 Serial Communication Field Termination Assembly, operates as a dedicated hardware component for serial data exchange between Safety Manager Control Processors and RS-232, RS-422, or RS-485 field devices.

Hardware Specifications

Parameter	Specification
Model	FC-DCOM-232/485
Brand	Honeywell
Origin	USA
Product Type	Serial Communication Field Termination Assembly
System Compatibility	Honeywell Safety Manager
Communication Interfaces	RS-232, RS-422, RS-485
RS-232 Interface	EIA/TIA-232 compliant, 1 channel
RS-485 / RS-422 Interface	EIA/TIA-485-A compliant, 2 channels
RS-232 Baud Rate	0 - 250 kBaud
RS-485 / RS-422 Baud Rate	0 - 2 MBaud
Communication Coding	Transparent, FM0, FM1, Manchester coding
Input Voltage	5 VDC +/-5%
Input Current	Max. 500 mA
Power Consumption	Max. 2.5 W
Power Source	Supplied by Safety Manager Control Processor(s)
Redundancy Support	Single or redundant Control Processor configuration
Mounting Type	DIN rail mounting
DIN Rail Compatibility	TS32 / TS35 x 7.5
Module Dimensions	110 x 70 x 61 mm
Terminal Dimensions	6 x 57 x 47 mm
Used Rail Length	117 mm
Weight	Approx. 0.66 kg to 1.0 kg
Operating Temp	Industrial cabinet environment
Approvals	CE, TUV, UL, FM
Safety Application	Suitable for Safety Manager SIL 3 system integration

Process Communication and Safety Manager Interface Characteristics

The FC-DCOM-232/485 provides serial communication conversion and termination functions between the Safety Manager Control Processor and external serial devices. Moreover, the module supports multiple electrical interface standards, allowing field equipment with RS-232, RS-422, or RS-485 communication layers to connect directly to the Safety Manager architecture.

The module receives operating power from the connected Control Processor(s), therefore eliminating a separate field power supply connection. In addition, the interface supports redundant processor arrangements where communication availability depends on the Safety Manager system configuration.

Honeywell Safety Manager communication modules commonly operate within process control architectures that require isolated field signal handling. Furthermore, Honeywell system designs typically apply channel-to-channel isolation principles for separating field wiring disturbances from controller electronics, supporting stable serial data transmission in industrial environments.

Frequently Asked Questions

Q: Does the FC-DCOM-232/485 require an external power supply?
A: No. The module receives 5 VDC power directly from the connected Safety Manager Control Processor(s).

Q: Which serial communication standards are supported by this module?
A: The module supports RS-232, RS-422, and RS-485 communication interfaces with configurable transmission coding options.

Q: Can the FC-DCOM-232/485 operate with redundant Control Processors?
A: Yes. The module supports connection to either a single Control Processor or a redundant processor configuration within the Safety Manager system.

Field Installation Guidelines

• Install the FC-DCOM-232/485 on compatible TS32 or TS35 DIN rails inside the Safety Manager cabinet assembly.
• Connect cable shields and field connector housings to the designated cabinet earth terminals to reduce electromagnetic interference.
• Separate serial communication wiring from high-voltage power cables and strong electromagnetic noise sources.
• Verify RS-232 point-to-point wiring polarity and RS-485/RS-422 differential pair routing before system commissioning.
• Confirm that communication baud rates, coding methods, and connected field device parameters match the Safety Manager configuration.
• Inspect terminal connections for proper mechanical retention before applying system power.
• Follow Honeywell Safety Manager installation manuals for grounding, cabinet layout, and safety system commissioning procedures.

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