10
G
EGQ110F931
Rev. 2021 - V35
DIP switches
VOC sensitivity
DIP 1
DIP 2
LOW
OFF
OFF
MEDIUM (default)
O N
OFF
HIGH
OFF
O N
IAQ
(Indoor Air Quality)
O N
O N
Output
DIP 4
Voltage 0 -10 V (default)
OFF
Current 4...20 mA
O N
Note:
DIP 3
is not assigned!
Level
IAQ
(Indoor Air Quality)
VOC
1
excellent
0
...
19
%
no action required
2
good
20
...
39
%
prompt airing recommended
3
moderate
40
...
59
%
airing recommended
4
poor
60
...
79
%
increased airing required
5
unhealthy
80
...
100
%
intense airing necessary
Table according to TVOC guidelines of the German Federal
Environmental Agency to assess indoor air contamination
(Bundesgesundheitsbl - Gesundheitsforsch -
Gesundheitsschutz 2007, 50: 990–1005)
Connecting diagram
EGQ110F931
1
2
3
12
11
13
UB+ 24V AC/DC
Output air quality 0-10V / 4...20mA
UB– GND
Breaker
changeover
24V/1A
Normally
open contact
Schematic diagram
EGQ110F931
1 2 3 4
ON DIP
SET
Zero
OFFSET
13 11 12 1 2 3
Br
eak
er
Normall
y
open c
ont
act
Output air quality
–UB GND
+U
B 2
4V A
C/
DC
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!
Connecting scheme
Parallel operation
Circuitry
Circuitry
0...10V
0V/GND
0...10V
0V/GND
Power supply
AC 24V~
0V
DC 15-36V = GND
Connecting scheme
Individual operation
Circuitry
0...10V
0V/GND
V
Power supply
AC 24V~
0V
DC 15-36V = GND
