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Asense CO2 Duct Sensor
Installation and Operation
#NSA-ASENSE-D-LCD-REL, NSA-ASENSE-D-REL
– 11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-745-01
Page
5
of
9
Electrical connections
The power supply has to be connected to
⨤
and
┴. ┴ is considered as system ground. If the analogue output is connected
to a controller, the same ground reference has to be used for the aSENSE RL unit and for the control system. Unless
different transformers are used, special precautions must be taken.
IMPORTANT
The same ground reference has to be used for the aSENSE RL unit and for the control system. If possible
keep the sensor powered up after mounting. Connect the analogue output before measuring.
Connection
Terminal
Function
Electrical Data
Notes
⨤
┴
Power (+)
Power Ground (-)
24 VAC/DC+ (+-20%), 3W
24 VAC/DC-
2W without output load
1
Out (1)
Out (2)
Analogue Output 1 (+)
Analogue Output 2 (+)
0-10 VDC or 0-20 mA, 2-10
VDC or 4-20 mA
Same as Output 1
According to positions of
OUT1 and start point jumpers.
2
According to positions of
OUT2 and start point
jumpers.
2, 3
5
6
7
Normally closed relay
Relay COM
Normally open relay
Contact free relay
minimum load 1mA/5V
rated load
0,5A/125VAC; 1A/24VDC
Triggered by register Out (3).
8
Not Used
1
The ground terminal is used as negative power supply DC input or AC phase ground (halfwave rectifier). A single transformer may be
used for the entire system.
2
aSENSE RL can deliver a voltage or a current loop for Out(1) / Out(2). To change between voltage and current output mode the
hardware jumpers are used. There is one jumper for Out(1) and one for Out(2), so that one output can be a voltage output and the other
a current output. Both, voltage output and current output can have start points 0 % (0-10 VDC or 0-20mA) or 20% (2-10 VDC or 4-
20mA). The same start point is used for both outputs. See the function manual.
3
Please use voltage outputs for temperature measurements. The accuracy of temperature measurements is valid only for units
configured in voltage outputs mode.