b3867 Schneider Andover Continuum BACnet MS/TP Terminal Controller 4 Universal Input 5 Triac Output

The b3867 is a native BACnet terminal controller from the Andover Continuum family, designed for commercial building applications. This compact direct digital controller is specifically intended for terminal units rather than central plant equipment, providing essential control functionality without requiring large controllers or full I/O racks.

The controller communicates via BACnet MS/TP on an RS-485 field bus as a master device, enabling direct addressing by head-end systems without intermediate gateways. Its practical point configuration combines universal inputs supporting multiple sensor types with triac outputs for stage control and analog outputs for modulating devices.

Commissioning requires careful planning of device instance numbers, which must be unique across the network and stable over time to maintain trend and alarm history integrity. RS-485 segments require consistent baud rates, proper termination, and single reference conductors.

Universal inputs demand particular attention during configuration, as the same terminals accept resistive sensors, dry contacts, or voltage signals. Software settings must match physical wiring to ensure accurate readings.

This controller is ideal for terminal units in commercial buildings including:

• Fan coil units, unit vents, and heat pump terminals
• Office fit-out projects for tenant terminal units
• Hotel and serviced apartment guest room fan coil installations
• School and healthcare building perimeter zones
• Existing Andover Continuum system maintenance and upgrades