User manual

Andover Continuum

BACnet Controllers-4

BACnet

Compliance with ASHRAE 135-2004 (protocol revision 4)

The Andover Continuum system is up-to-date with the latest advances in the ASHRAE BACnet

standard. BACnet is in its 4th protocol revision since its introduction in 1995. The ASHRAE 135-

2004 BACnet standard calls for BACnet vendors to update their BACnet controller to account for

Scheduling and Trending improvements as well as other background communications. Andover

Continuum BACnet controllers adhere to these changes and all are BTL listed.

b3920 System Controller

The BACnet b3920 controller is a stand-alone microprocessor-based system controller for DDC

control.Capableofmonitoring,controlling,schedulingandloggingmodularsystems,theb3920

contains an I/O expansion port to meet additional point count needs and an optional display

with keypad for local viewing of point values and setpoint modifications. Up to 127 controllers

can be networked on one bCX1 controller.

•16Universalinputs

•1Roomsensorinput,whichsupportsContinuum’sSmartSensor

•8DigitalFormCrelay-basedoutputswithoverrides

•8Analogueoutputswithoverrides

•I/Oexpansionport

•Removableterminalblocks

•Localserviceport

•Realtimeclock

•OptionalLCDdisplay(4linex16character)withkeypadisavailableseparately

•CEapproved

Technical Specifications

Power:  115-230VAC,50/60Hz@45VA

OperatingRange:  0°Cto+49°C10–95%RH(non-condensing)

Dimensions: 330mm (H) x 271mm (W) x 69mm (D)

Battery:  Replaceable,non-rechargeablelithiumbatteryproviding5years

accumulated power failure back-up

Memory:  512KBRAM,512KBFLASH

Inputs/Outputs

Universal Input (12 bit):

Supervised,0-10VDCor0-20mA,Temperature(-34°Cto+110°C)

  digital,counter(4Hz)

RoomSensorInput: 0°Cto+41°C

FormCRelay-basedOutput: SPDT24VAC/30VDC@3A,0.1secforPWMcontrol

Analogue Output (8 bit): 0-10VDC or 4-20mA

b3920 without built-in LCD display and keypad b3920

b3920 with built-in LCD display and keypad b3920-D

Remote LCD display with keypad (max. distance 3m) xP- Display

System Controller b3920

Local Controllers b3600 Series & b3800 Series