OJ Electronics GreenZone Module MP-Bus Instruktionen Seite 8

English
Display
Comments
readout
Zone number (address) not yet allocated by OJ GreenZone™ Master
Software update in progress
Connector "H" – Modbus sensor (°C, %rh or VOC) (see figs 3 and 18)
OJ GreenZone™ Module MP-Bus is equipped with a Modbus input for connecting
Modbus sensors (figs 3 and 18).
It is possible to connect a sensor of the following type from OJ Electronics:
• OJ-RPT-20T
• TTH-6202
• TTH-6040-W
• VTH-6202
• HTH-6202
In larger rooms where you want to measure the temperature in several places, the
maximum number that can be mounted is 1 x OJ-RPT-20T, 1 x TTH-6040-W with the
dial in position 1, and 1 x TTH-6040-W with the dial in position 2. The Zone Module
calculates and uses the average temperature automatically from these sensors. The
terminal layout of the RJ12 connector is shown in fig. 6.
Connector "J" – "Modbus in" entry port (see figs 3 and 5)
OJ GreenZone™ Module MP-Bus is equipped with a "Modbus in" (see figs 3 and 5)
and a "Modbus out" (see figs 3 and 13) RJ12 connector for integration in the zone-
control system with a standard Modbus RJ12 cable (see fig. 4). The terminal layout of
the RJ12 Modbus connector is shown in fig. 6. The max. permissible distance between
two successive OJ GreenZone™ Module units is 100 m. The max. permissible total
cascade length of Modbus cable between all OJ GreenZone™ Module units is 2500 m.
The Modbus cable must be as shown in fig. 7. Modbus communication is OK when the
yellow LED flashes regularly.
Connector "K" – Voltage supply (see figs 8 and 9)
OJ GreenZone™ Module MP-Bus must be equipped with a 24 VAC power supply (see
figs 8 and 9). The 24 VAC connector is equipped with looping terminals to allow looping
to max. two other OJ GreenZone™ Module MP-Bus units.
The exit terminals (terminals 3 and 4) are short-circuit protected. This means that the OJ
GreenZone™ Module MP-Bus will continue to function even if the exit terminals (3 and
4) are short-circuited. It will therefore only be the subsequent OJ GreenZone™ Module
units that fail and become disconnected if terminals 3 and 4 are short-circuited. The
8
Room control panel with built-in temperature sensor
Duct temperature sensor
Room temperature sensor
(VOC sensor)
(combined temperature and humidity sensor)
© 2017 OJ Electronics A/S
OJ GreenZone™ Module MP-Bus