Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | XL2000B3A |
| Manufacturer | Honeywell |
| Product Family | Excel Web II |
| Controller Category | BACnet Building Controller (B-BC) |
| Application | HVAC and building automation |
| Programming | Freely programmable; application software depends on the CARE engineering configuration |
| BACnet/IP | Supported |
| BACnet MS/TP | Supported |
| BACnet Protocol Revision | 1.12, documented in the published PICS |
| External HMI Connection | RJ45 socket for XL2000HMI-A |
| Onboard I/O | No onboard I/O in this model |
| Maximum I/O Capacity | Up to 600 points through supported expansion buses |
| Expansion | Panel Bus and LONWORKS Bus |
| Supply Voltage | 24 VAC, reported in product listings; verify against the controller nameplate |
| Power Consumption | 4.5 W, reported in product listings; confirm for the exact hardware revision |
The controller’s published model description distinguishes the XL2000B3A from the B0A and B2A versions by its RJ45 connection for the external XL2000HMI-A. The B3A is not the version with a built-in HMI.
Product Introduction
The Honeywell XL2000B3A is a programmable Excel Web II controller designed for HVAC and building automation applications. It communicates with other controllers and operator workstations through BACnet/IP and BACnet MS/TP, allowing it to participate in distributed building-control networks.
Unlike versions with an integrated operator interface, the XL2000B3A has an RJ45 connection for the separate XL2000HMI-A external HMI. Its I/O capacity is provided through supported expansion arrangements rather than onboard I/O. Actual point capacity and application behavior depend on the installed bus devices and configured control software.
XL2000B3A
Application Scenarios & Field Pitfalls
Typical applications
- HVAC plant control: Supervisory control of air-handling units, chilled-water systems, heating circuits, and associated building equipment.
- Distributed building automation: BACnet communication with compatible controllers and operator workstations over IP or MS/TP networks.
- Remote operator access: Connection to the XL2000HMI-A for local operation where an external operator interface is required.
- Expanded I/O installations: Integration with supported Panel Bus and LONWORKS devices to increase the controller’s available field points.
Field checks before replacement or commissioning
- Do not assume the HMI is included. The B3A designation identifies the external-HMI connection arrangement. Confirm whether the XL2000HMI-A is present and whether its cable and mounting accessories are available.
- Check the exact I/O architecture. The XL2000B3A has no onboard I/O. Confirm the installed Panel Bus and LONWORKS devices, point count, addressing, and wiring before treating the 600-point figure as available capacity.
- Verify BACnet network settings. Check device instance, IP configuration, MS/TP baud rate, MAC address, and network termination where applicable. A controller that powers up may still fail to communicate if these settings do not match the existing network.
- Preserve the application configuration. The PICS identifies application software as dependent on the CARE 10 application. Confirm the project files, software version, controller firmware, and required licenses before replacing hardware.
- Verify supply requirements from the nameplate. Although product listings report 24 VAC and 4.5 W, those values should not replace inspection of the actual unit’s rating label and installation documentation.
Related Products
These models belong to the Excel Web II family, but their hardware and operator-interface arrangements differ:
- XL2000B0A – No onboard I/O and no connection for the XL2000HMI-A.
- XL2000B2A – Version with an integrated HMI; it does not support the external HMI.
- XL2014B3B – Controller with 14 onboard I/O points and an RJ45 connection for the external HMI.
- XL2026B3A – Controller with 26 onboard I/O points and an RJ45 connection for the external HMI.
- XL2014B2B – Version with 14 onboard I/O points and an integrated HMI.
- XL2026B2A – Version with 26 onboard I/O points and an integrated HMI.
- – External operator interface designed for compatible Excel Web II controllers, including the XL2000B3A.
These are family references, not automatic substitutes. Select a replacement by comparing onboard I/O, HMI arrangement, bus configuration, application software, and controller firmware.
Procurement and Replacement Notes
Before purchasing an , request clear photographs of the product label, terminal layout, RJ45 HMI connection, and hardware revision. Confirm whether the unit includes its original accessories and whether its condition is unused, previously installed, or refurbished. Do not treat a seller’s condition description as proof of functional testing.
For a replacement project, obtain the existing CARE application backup and document all BACnet settings before removing the installed controller. A matching model number alone does not guarantee that the replacement will operate with the existing software, field devices, or network configuration.
Recommended procurement checks: exact model and revision, power rating, external HMI compatibility, BACnet configuration, I/O expansion inventory, firmware status, and documented functional-test results.
