OJ Electronics GreenZone Module M Instruktionen Seite 9

OJ GreenZone™ Module M
"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 suc-
cessive OJ GreenZone™ Module M units is 100 m. The max. permissible total cascade
length of Modbus cable between all OJ GreenZone™ Module M units is 2500 m. The
Modbus cable must be as shown in fig. 7. The green flashing LED indicates functional
Modbus communication.
Connector "K" – Voltage supply (see figs 8 and 9)
OJ GreenZone™ Module M 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 M units. The exit terminals (terminals 3 and 4) are short-
circuit protected.
This means that the OJ GreenZone™ Module M 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 M units that fail and become disconnected if terminals 3 and 4 are
short-circuited. The recommended cross-sectional wire area is 2x1.5 mm
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 M units may be
connected to exit terminals 3 and 4 (see fig. 9).
Connector "L" – PT1000 temperature sensor and CO2 sensor (see figs 3 and 10)
OJ GreenZone™ Module M is equipped with inputs for analogue sensors (see figs 3 and
10).
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:
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 1, 4 and 6 of the RJ12 con-
nector (see fig. 10).
© 2017 OJ Electronics A/S
English / Instruction
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