VALLOX DIGIT2 SE/VKL/MLV
Surface mounting
Wiring
Cable:
NOMAK 2 x 2 x 0.5 mm
2
+ 0.5 mm
2
Base plate of the CO
2
sensor
Electronics card of the CO
2
sensor (model may vary)
NOTE!
Faulty coupling of the (+) wire destroys
the carbon dioxide sensor!
1 = orange 1
= +
2 = white 1
= –
3 = orange 2
= A
4 = white 2
= B
5 = metal
= signal ground
ca. 21 VDC
}
14
125
38
76
Connecting two or more
units (slave unit)
Connect slave units as
specified in the adjoining
connection instructions.
Slave units do not operate
independently, but follow the
instructions received from the
host unit. Neither control
panel nor sensors must be
connected to a slave unit.
NOTE! + wire must not be connected to a SLAVE UNIT.
SLAVE UNIT must not have a 6K8 resistor in place.
SLAVE UNIT TERMINAL BLOCK
HOST UNIT TERMINAL BLOCK
SLAVE UNIT TERMINAL BLOCK
SLAVE UNIT TERMINAL BLOCK
HUMIDITY SENSORS
• When mounting two or more humidity
sensors, connect them to the terminal
block of the connection box by connec-
ting the first humidity sensor to %RH1,
in place of the 6K8resistor in the termi-
nal block (remove the resistor in this ca-
se), and the second humidity sensor to
%RH2. See the electrical diagram.
CARBON DIOXIDE SENSORS
• Carbon dioxide sensors are connected
individually.
• When the first carbon dioxide sensor has
been connected to the system, the unit is
switched on. After this, the unit gives the
sensor an address. Follow the same steps
for other carbon dioxide sensors.
S +
The sensor is wired straight from the electrical connection box of the unit.
The CO
2
sensor is connected directly from the connection box of the unit, or in series with
another CO
2
sensor or control panel (see External electrical connections on page 8).
Surface mounting
Wiring
Cable:
2 x 0.5 mm
2
Electronics board of
%RH sensor
Base plate
of sensor
14
125
38
76
Mounting and wiring of humidity sensor
Mounting and wiring of carbon dioxide sensor
1 2 3 4 5
+ – A B M
© VALLOX • We reserve the right to make changes without prior notification.
2
6
SENSORS
