8
G
AERASGARD
®
FSLQ
Rev. Data - V20
Schematic diagram
FSLQ - U
VOC
%
U
A
[V]
0
0.0
5
0.5
10
1.0
15
1.5
20
2.0
25
2.5
30
3.0
35
3.5
40
4.0
45
4.5
50
5.0
55
5.5
60
6.0
65
6.5
70
7.0
75
7.5
80
8.0
85
8.5
90
9.0
95
9.5
100
10.0
4
4
2
2
1
1
+UB 24 V
AC/DC
GND
Output
air quality
0-10 V
Connecting scheme
Parallel operation
Connecting scheme
Individual operation
Circuitry
Circuitry
Output
0V/GND
Output
0V/GND
Power supply
AC 24V~
0V
DC 15-36V = GND
Circuitry
Output
0V/GND
Power supply
AC 24V~
0V
DC 15-36V = GND
SUPPLY VOLTAGE :
For operating voltage reverse polarity protection, a one-way rectifier or
reverse polarity protection diode is integrated in this device variant.
This internal one-way rectifier also allows operating 0 - 10 V devices on AC
supply voltage.
The output signal is to be tapped by a measuring instrument. Output
voltage is measured her against zero potential (O V) of the input voltage!
When this device is operated on
DC supply voltage
, the operating voltage
input UB+ is to be used for 15...36 V DC supply and UB – or GND for
ground wire!
When several devices are supplied by one 24 V
AC voltage supply
, it is to
be ensured that all ”positive“ operating voltage input terminals (+) of the
field devices are connected with each other and all ”negative“ operating
voltage input terminals (–) (= reference potential) are connected together
(in-phase connection of field devices). All outputs of field devices must be
referenced to the same potential!
In case of reversed polarity at one field device, a supply voltage short-
circuit would be caused by that device. The consequential short-circuit
current flowing through this field device may cause damage to it.
Therefore, pay attention to correct wiring!
