Honeywell XF823A Binary Input Module

The Honeywell XF823A is a Panel Bus binary input expansion module designed for Honeywell Excel Web and ComfortPoint Open automation systems. It provides 12 configurable binary input channels for monitoring dry contacts, open-collector signals, and pulse inputs. The module communicates over the Honeywell Panel Bus and supports hot-plug replacement, allowing maintenance without disturbing adjacent modules or field wiring.

Binary Input Functions

XF823A provides 12 binary input channels (BI1-BI12) for monitoring status signals from switches, relays, alarms, meters, and other field devices.

The inputs support both voltage-free contacts and open-collector signal sources. Each channel can be used as a standard binary input or configured as a pulse counter, providing flexibility for status monitoring and utility metering applications.

Pulse Counting Capability

All 12 channels support pulse counting functions. This allows the module to collect pulse-based data from compatible metering devices, counters, and consumption monitoring equipment.

Supported pulse specifications include:

• Maximum input frequency: 20 Hz

• Minimum pulse width: 25 ms

• Pulse counting available on all channels

Panel Bus Communication

The module communicates with compatible Honeywell controllers through the non-isolated Panel Bus interface. Communication speeds of up to 115.2 kbps support fast data exchange between the controller and expansion modules.

A front-mounted hexadecimal rotary switch provides hardware address selection from 0 to F, simplifying installation within multi-module Panel Bus networks.

Hot-Pluggable Design

XF823A supports hot plugging, allowing the module to be installed or removed while system power remains applied. This feature helps simplify maintenance activities without requiring removal of field wiring connections on neighboring modules.

Electrical Characteristics

The module operates from either 24 VAC (±20%, 50/60 Hz) or 24 VDC power sources. Internal binary input circuits provide an open-circuit voltage of 24 VDC across the input contacts, while closed contacts draw approximately 2 mA.

Power consumption remains low, with a maximum requirement of 1.5 W at 24 VDC or 3.5 VA at 24 VAC.

Mechanical and Environmental Characteristics

XF823A is housed in an IP20-rated UL94-V0 self-extinguishing plastic enclosure intended for installation inside control cabinets. The module mounts directly onto a standard 35 mm DIN rail and uses removable terminal blocks for field wiring.

The design supports operation in indoor automation environments with temperatures from 0 deg C to 50 deg C and non-condensing humidity up to 95% RH.

Status Indication

Integrated LEDs provide local diagnostic information:

• Green Power LED indicates internal power status.

• Yellow Service LED indicates communication status, module health, or configuration state.

These indicators assist commissioning and troubleshooting activities without requiring access to supervisory software.

Technical Specifications

Compatibility

XF823A is designed for Honeywell Excel Web and ComfortPoint Open systems using the proprietary Panel Bus protocol. The module can be integrated with controllers such as XL800, EAGLE, LION, and Falcon platforms that support Panel Bus expansion modules.

Frequently Asked Questions

Q: What types of field signals can be connected to XF823A?
A: The module accepts dry-contact and open-collector inputs. Typical examples include limit switches, relay contacts, alarm contacts, and pulse-generating devices.

Q: Can XF823A be used for pulse counting applications?
A: Yes. All 12 input channels support pulse counter mode with a maximum input frequency of 20 Hz and a minimum pulse width of 25 ms.

Q: Can the module be replaced while power remains on?
A: Yes. XF823A supports hot-plug operation and can be inserted or removed without disturbing adjacent modules or their field wiring connections.