User manual

Andover Continuum
BACnet
Andover Continuum
BACnet Controllers-7
BACnet BACnet
b3850 Series Terminal Controllers
BACnet b3850 Series terminal controllers are stand-alone microprocessor-based controllers used
forcost-effectiveDDCcontrolofindividualterminalunits.Theyarecapableofmonitoring,
controlling,schedulingandloggingmodularsystems.Upto127controllerscanbenetworkedon
one bCX1 controller.
•IdealforVAVapplicationswhereexternaldamperactuatorsareused
•ContainsanI/Oexpansionportfortheadditionofuptotwoexpansionmodules
•Serviceportprovided
•DIN-railorpanelmounting
•CEapproved
•RTConb3851
Technical Specifications
Power: 24VAC,50/60Hz@20VA
OperatingRange: 0°Cto+49°C10–95%RH(non-condensing)
Dimensions: 139mm (H) x 207mm (W) x 62mm (D)
Battery: Replaceable,non-rechargeablelithiumbatteryproviding5years
accumulated power failure back-up
Memory: 128KBSRAM,1MBFLASH
Inputs/Outputs
UniversalInput: Supervised,0-5VDCor0-20mA,Temperature(-34°Cto+110°C)
 digital,counter(4Hz)
Airflow Sensor Input: 0 - 500Pa
RoomSensorInput: 0°Cto+41°C
FormATriac-basedOutput: SPST24VAC/VDC@3A,0.1secforPWMcontrol
Universal Airflow Room Form A Form K Expansion Part
Inputs Sensor Sensor Relay Tri-state Port Number
Inputs Input Outputs Relay
(0-500Pa) Output
b3850 4 1 1 3 1 3 b3850
b3851 4 - 1 3 1 3 b3851
b3853 4 2 1 3 1 3 b3853
Optional
Remote LCD Display - with Keypad (max. distance 3m) xP-Display
Terminal Controller b3850 Series