Exhausto OJ GreenZone Module MP-Bus Instructions page 9

OJ GreenZone™ Module MP-Bus
The recommended cross-sectional wire area is 2x1.5 mm
OK when the green LED flashes regularly.
NOTE!
The short-circuit protection means there is a limit to the load that can be placed on the exit
terminals (3 and 4). As a result, no more than two OJ GreenZone™ Module units may be
connected to exit terminals 3 and 4 (see fig. 9).
Connector "L" – PT1000 temperature sensor, humidity sensor and CO2 sensor (see
figs 3, 10 and 10A)
OJ GreenZone™ Module MP-Bus is equipped with inputs for analogue sensors (see figs
3, 10 and 10A). The inputs allow connection of a standard PT1000 sensor and a CO2
sensor with a standard 0-10 VDC output signal = 0-2000 ppm.
The sensors should be connected to the RJ12 connector marked "L" in fig. 3.
Note: This connector is NOT a Modbus connector.
Room temperature
sensor:
0-10 VDC input
for CO2 sensor:
0-10 VDC input
for humidity sensor:
If no Modbus temperature sensor is connected to the connector marked "H", the
PT1000 sensor connected to this input ("L") will automatically be configured as an
exhaust/room sensor.
If a Modbus sensor is connected to the connector marked "H", the Modbus sensor
values have higher priority than that of the humidity sensor on terminal 7 and the
temperature sensor on terminal 10.
Connector "M" – Temperature offset (°C) (see figs 3 and 11)
OJ GreenZone™ Module MP-Bus is equipped with an inlet for the connection of a
control unit for user-determined offset in room temperature (see figs 3 and 11). Via the
web user-interface, the temperature offset can be set to either +/-3 °C or +/-5 °C.
The PT1000 room temperature sensor can be installed in the
exhaust duct or the room. It connects to screw terminal 9 and
10. (See fig. 10).
The CO2 sensor can be installed in the exhaust duct or in the
room. It should be connected to pins 5, 6 and 8 (see fig. 10).
The humidity sensor can be installed in the exhaust duct or in
the room itself. It should be connected to screw terminals 6, 7
and 8 (see fig. 10A).
© 2019 OJ Electronics A/S
. Modbus communication is
2
English
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