Copyright HK Instruments 2021
www.hkinstruments.fi
Installation version 1.0 2021
Pin header
Description
OUT1
OUT2
OUT3
OUT4
GND
Voltage / current output selection
• Current output is an optional
Output 1
Output 2
Output 3
Output 4
Ground
SCHEMATICS
DIMENSIONAL DRAWINGS
INSTALLATION
1) Mount the device in the desired location (see step 1).
2) Route the cables and connect the wires (see step 2).
3) Connect the display cable to the display connector on the PCB. (See
schematics)
4) The device is now ready for configuration.
WARNING! Apply power only after the device is properly wired.
PM SENSOR
CO₂ SENSOR
VOC SENSOR
A+
B–
24V
GND
GND
OUT1
OUT2
OUT3
OUT4
GND
OUT1
OUT2
OUT3
OUT4
DISPLAY CONNECTOR
2
1
5
4
TEMP OR
rH + TEMP
SENSOR
3
mA-MODULE
Pin header
Description
Open
Connected
Open
Connected
CO
2
/ PM output range selection
400...2000 ppm (CO
2
models)
0...2000 ppm (CO
2
models)
0...500 μg/m
3
(PM models)
0...50 μg/m
3
(PM models)
Pin header
Description
Open
Connected
Menu lock
Menu lock disabled
Menu lock enabled
1
2
Connector
Description
A+
B-
RS485 Modbus/RTU slave (optional)
DATA+
DATA-
24 V
GND
GND
Power supply
24 VAC/DC ±10 %
Ground
Ground
3
Connector
Description
OUT1
OUT2
OUT3
OUT4
GND
Voltage / current outputs
• Output settings can be modified from the display
menu
• See the lid label for factory default settings.
Output 1
Output 2
Output 3
Output 4
Ground
4
5
V
m
A
Opening/closing the lid
1) Open the lid by pressing the center from the bottom of the lid as in
the figure.
2) Close the lid by inserting the top of the lid into the grooves first and
pushing the bottom edge as in the figure.
