XF823A

The Honeywell XF823A, also cataloged as the XF823A Panel Bus I/O Module, provides pluggable I/O connectivity for Honeywell Excel 800 building control systems. It communicates through the Panel Bus and uses a removable electronic module with a separate terminal socket, allowing field wiring to be completed before electronic module installation. The supplied specifications list a 24 VAC power supply and an operating temperature range of 0 to 50 deg C.

Hardware Specifications

Parameter	Specification
Model	XF823A
Brand	Honeywell
Product Type	Panel Bus I/O Module
System Compatibility	Honeywell Excel 800 Panel Bus
Communication Interface	Panel Bus
Power Supply	24 VAC
Operating Temp	0 to 50 deg C
Terminal Type	Push-in terminals; screw-type terminals also available in the product family
Installation	Pluggable electronic module with separate terminal socket
Maintenance	Module exchange without rewiring
Approvals	CE
Standards	EN 60730-1, EN 60730-2-9

Panel Bus Communication and Modular I/O Design

The XF823A belongs to Honeywell's modular Panel Bus I/O architecture. Its terminal socket can be mounted and wired separately from the removable electronic module, allowing field wiring to be completed before the electronics are installed. Module replacement does not require rewiring the terminal connections.

The Excel 800 platform supports automatic configuration and commissioning functions for Panel Bus I/O modules. Compatibility depends on the connected controller supporting Panel Bus communication.

The broader Honeywell Excel 800 I/O family supports sensor interfaces including NTC20K, NTC10K, PT1000, NI1000TK5000, PT3000, Balco500, 0/2-10 V and 0/4-20 mA. These family-level capabilities should not be interpreted as confirmation that every sensor type is directly supported by the XF823A itself.

Frequently Asked Questions

Q: Can the XF823A electronic module be replaced without rewiring the field terminals?

A: Yes. The modular design separates the terminal socket from the removable electronic module, allowing replacement without rewiring the connected field conductors.

Q: Which controller interface is required for the XF823A?

A: The connected controller must support Honeywell Panel Bus communication. The Excel 800 controller platform is one documented example.

Q: What power supply and operating temperature range are specified?

A: The supplied product data specifies 24 VAC and an operating temperature range of 0 to 50 deg C.

Field Installation Guidelines

• Verify that the host controller supports the Honeywell Panel Bus interface before installation.
• Mount the terminal socket securely in the control enclosure and complete field wiring before inserting the electronic module.
• Confirm terminal assignments and signal types against the applicable XF823A wiring documentation.
• Separate low-level analog signal wiring from power conductors where practical to reduce electrical interference.
• Apply appropriate shielding and grounding practices for connected analog signals, following the sensor and controller installation documentation.
• Verify the 24 VAC supply and confirm that the operating environment remains within the specified temperature range.
• Inspect terminal connections and confirm bus communication after installation or module replacement.

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