Honeywell XF821A Panel Bus Analog Input Modules
Manufacturer: Honeywell
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Part Number: XF821A
Condition：New with Original Package
Product Type: Analog Input Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Honeywell XF821A Panel Bus Analog Input Module
The Honeywell XF821A, also cataloged as the XF821A Panel Bus Analog Input Module, operates as a dedicated hardware component for analog signal acquisition within Excel 800 and CIPer 50 networks. This unit processes physical sensor inputs, translating raw electrical metrics into digital values for controller execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | XF821A |
| Brand | Honeywell |
| Origin | USA |
| Weight | 600 g |
| Dimensions | Standard modular DIN-rail housing |
| Operating Temp | 0 deg C to +50 deg C |
| Power Consumption | Powered via 24 VAC supply bus |
| Number of Inputs | 8 analog channels |
| Signal Input Types | 0-10 V, 2-10 V, 0-20 mA, 4-20 mA, NTC10K, PT1000 |
| Analog Resolution | 16-bit |
Channel-to-Channel Isolation and Signal Processing
The module executes precise analog-to-digital conversion across eight independent channels, supporting voltage, current, and resistance temperature detector inputs. System architecture incorporates channel grouping to minimize electromagnetic interference during data transmission over the Panel Bus communication layer. Signal processing routines apply internal filtering to mitigate noise pickup from long cable runs typical in industrial and building automation environments. Furthermore, the modular separation between the electronic processing board and the XS821-22 terminal base maintains circuit integrity during active loop operations.
Frequently Asked Questions
Q: What is the primary power supply requirement for the XF821A module?
A: The module consumes operating power from an external 24 VAC source connected through the system backplane terminal base.
Q: Can the electronic unit be replaced without disconnecting field wiring?
A: Yes, the pluggable design allows technicians to detach the electronic module from the XS821-22 base while leaving field wiring intact in the screw-type or push-in terminals.
Q: How does the module communicate with the controller?
A: Data transfer is handled via the proprietary Honeywell Panel Bus protocol, ensuring deterministic data exchange with Excel 800 and CIPer 50 controllers.
Field Installation Guidelines
Mount the XS821-22 terminal base securely onto a standard DIN rail inside the control cabinet. Terminate incoming field sensor cables to the designated push-in or screw-type terminals, ensuring proper shielding and grounding to prevent common-mode noise interference. Insert the XF821A electronic module squarely into the terminal base until the mechanical latch engages fully. Verify the 24 VAC power supply voltage before energizing the system loop.