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Honeywell FC-IO-0002 I/O Extender Module

The Honeywell FC-IO-0002, also cataloged as the FC-IO-0002 I/O Extender Module, operates as a dedicated hardware component for extending power and watchdog signal interfaces within Honeywell safety system I/O assemblies.

Hardware Specifications

Parameter	Specification
Model	FC-IO-0002
Brand	Honeywell
Product Type	I/O Extender Module
Origin	USA
Weight	0.12 kg
Dimensions	2 x 19 x 12.8 cm estimated shipping size
Power Consumption	5 VDC input, 100 mA plus connected I/O board load
Approvals	CE, TUV, UL, CSA
Space Requirements	4 TE, 3 HE (= 4 HP, 3U)
Watchdog Inputs	2 inputs
Watchdog Input Current	Max. 10 mA for WD1in + WD2in
Watchdog Outputs	18 outputs
Watchdog Output Current	Max. 25 mA
Power Inputs	2 inputs, diode OR-ed, 5 VDC
Power Input Current	100 mA plus 5 V load of all 18 I/O boards and watchdog load of all 18 I/O boards
Power Outputs	2 groups
Output Voltage Drop	0.2 V < V < 0.8 V versus highest Vin
Output Current Capacity	> 1.25 A per group

Channel Isolation and Process Interface Characteristics

The Honeywell FC-IO-0002 provides electrical extension functions for Honeywell I/O assemblies by distributing 5 VDC power and watchdog-related signals. The module accepts two diode OR-ed power inputs and supplies two output groups for connected I/O boards.

The module supports watchdog signal expansion with two watchdog inputs and eighteen watchdog outputs. Therefore, the FC-IO-0002 manages the additional load requirements from multiple I/O boards while maintaining defined current limitations.

The design supports Honeywell process control hardware architectures where channel-to-channel isolation and controlled power distribution are required. Furthermore, the module operates as an electrical interface element rather than a signal processing unit and does not perform analog measurement or protocol conversion.

Frequently Asked Questions

Q: How many watchdog inputs and outputs does the FC-IO-0002 provide?
A: The module provides 2 watchdog inputs and 18 watchdog outputs. The watchdog input current is limited to 10 mA maximum, while each output supports up to 25 mA.

Q: What power input configuration does the FC-IO-0002 support?
A: The module uses 2 diode OR-ed 5 VDC power inputs. The input current requirement is 100 mA plus the connected load from 18 I/O boards and watchdog circuits.

Q: Can the FC-IO-0002 process field measurement signals?
A: No. The FC-IO-0002 functions as an I/O extender and power/watchdog distribution module. It does not provide analog input, analog output, or communication processing functions.

Field Installation Guidelines

• Install the FC-IO-0002 in the specified Honeywell rack or I/O assembly position with the required 4 TE and 3 HE mechanical space allocation.
• Verify the 5 VDC supply polarity before connection because the module uses diode OR-ed power inputs.
• Route power wiring separately from high-voltage switching circuits to reduce electrical interference.
• Maintain proper grounding practices for the installed control cabinet and cable shielding systems.
• Check the connected I/O board load before operation to ensure that the total 5 VDC current remains within the module output capability.
• Confirm watchdog wiring assignments before commissioning to prevent incorrect diagnostic signal routing.

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