Product Details
The Honeywell PUB6438SR-CHN, also cataloged as the PUB6438SR Programmable Controller, operates as a dedicated hardware component for HVAC signal conditioning and loop processing within BACnet MS/TP networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PUB6438SR-CHN |
| Brand | Honeywell |
| Origin | USA / As specified on hardware label |
| Dimensions | 138 mm x 174 mm x 57.4 mm |
| Operating Temp | -40 deg C to +65.5 deg C |
| Power Consumption | 24 VAC nominal power supply |
| Processor | High-performance microprocessor |
| Memory | Flash memory for program storage |
| Communication Protocol | BACnet MS/TP over EIA-485 (RS-485) |
| Universal Inputs (UI) | 6 channels |
| Digital Inputs (DI) | 4 channels |
| Analog Outputs (AO) | 3 channels |
| Digital Outputs (DO) | 8 channels |
FOUNDATION Fieldbus / Profibus PA Connectivity and Channel-to-Channel Isolation
The PUB6438SR-CHN manages local loop processing via an onboard microprocessor and Flash memory array while routing telemetry over EIA-485 BACnet MS/TP communication channels. Built-in signal routing circuitry delivers robust channel-to-channel isolation across all 6 Universal Inputs, 4 Digital Inputs, 3 Analog Outputs, and 8 Digital Outputs. This isolation prevents ground noise coupling and common-mode current loops when bridging low-voltage temperature sensors or modulating actuators to central building automation networks and high-level fieldbus gateways.
Frequently Asked Questions
Q: What communication protocol physical layer does the PUB6438SR-CHN use for network integration?
A: The controller utilizes BACnet MS/TP running over standard EIA-485 (RS-485) differential serial interfaces.
Q: What are the input and output channel counts supported by the PUB6438SR-CHN controller?
A: The board provides 6 Universal Inputs (UI), 4 Digital Inputs (DI), 3 Analog Outputs (AO), and 8 Digital Outputs (DO).
Field Installation Guidelines
- Mount the PUB6438SR-CHN securely onto a standard DIN rail or panel enclosure frame before making power connections.
- Wire the main 24 VAC input power through dedicated terminal blocks, verifying correct voltage limits before energizing the circuit.
- Terminate all EIA-485 BACnet MS/TP communication lines using twisted shielded pair wiring, connecting the cable shield to cabinet earth ground at a single point.
- Segregate 24 VAC power wiring and relay digital output lines from low-level universal input analog sensor cables to prevent inductive noise coupling.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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