Specifications

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VAV Controller - Modbus & BACnet
Main controller, 24VAC for VAV applications with
Modbus or BACnet BMS interface
The VAV controller is designed to work with VAV (Variable Air
Volume) dependent pressure units.
The VAV controller consists of Master and Slave units (up to 3
Slaves per Master unit) and can operate as part of a B.M.S
control network or as standalone units.
General Features
y Main supply – 24VAC
y RS-485 Communication port – Available in BACnet or
Modbus protocols
y Output for Cool - 3 wire (Open, Common, Close)
24VAC
y Wall panel – ETN type
y Offset – for temperature reading adjustment
y Optional Slave units, useful in large spaces – the slave
unit mimics the master operation
y can be used with electric heater or hot water valve
for reheat – Model Dependant
Wiring Diagram
3
J2
OP CM CL
7
8
T1
2
1
AB
RS485
Heat element
24VAC,200W
OP CM CL ~H NH
N ~ J1J2
Motor
VAV Box (Supplied by others)
Heat element
24VAC,200W
Main
Supply
24VAC
continuous
heating
element
Solid
State
relay
Damper
24VAC,0.1A
VAV02 (SLAVE)
Motor
VAV Box (Supplied by others)
continuous
heating
element
OP CM CL ~H NH
N ~ J1J2
Tel. jacks
Heat element
24VAC,200W
Main
Supply
24VAC
Damper
24VAC,0.1A
VAV02 (SLAVE)
Motor
VAV Box (Supplied by others)
continuous
heating
element
N ~
Main
Supply
24VAC
Communication
RS485
Damper
24VAC,0.1A
Room
Panel
ETN/X500/VAV
VAV01 (MASTER)
Solid
State
relay
~H NH
Solid
State
relay
Tel. jacks Tel. jack
On Off Select
Temperature
sensor