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Installation and Operating Instructions
Central ventilation unit – KWL 500 W/W ET
5.1.1 Connection diagram
KWL-EM eC
art. nr.: 40155
3x0,5 mm
2
KWL-VOC eC
Sensor*
2
art. nr.: 20247
2x2x0,5 mm
2
KWL-FTF eC
Sensor*
1
art. nr.: 20249
2x2x0,5 mm
2
KWL-CO2 eC
Sensor*
2
art. nr.: 20248
2x0,5 mm
2
2x2x0,5 mm
2
2x0,5 mm
2
2x0,5 mm
2
RJ45
Power supply
Maximum*
<= 6 W
KWL-BE Touch
1 W
KWL-FTF eC Sensor
0,3 W
KWL-CO2 eC Sensor
1 W
KWL-VOC eC Sensor
0,6 W
KWL-KNX Connect
0,2 W
24 V
Voltage
DC
85499-236 ss_1433 22.03.2023
KWL-KNX
Connect
art. nr. 20253
-
+
-
-
A
B
4x0,5 mm
2
Connection box
MB_A
MB_B
+24V
RS_A
RS_B
GND
NTC
GND
+24V
RS_A
RS_B
GND
+24V
D/I1
+24V
D/I2
Ventilation unit internal
electrical connection
MB_A
External Modbus A signal
MB_B
External Modbus B signal
+24 V
+ 24 V voltage (DC)
Digital and analog ground
GND
potential
Local hardw are Modbus A
RS_A
signal
RS_B
Interner Modbus B Signal
External temperature sensor
NTC
connector
*
All internal bus dev ices may together consume a maximum of 6 W
*
1
Maximum of 6 KWL-FTF eC sensors possible
*
2
Maximum total of 6 KWL-CO2 eC / KWL-VOC eC possible
14
Modbus cable length: maximum 100 m
tw isted pairs of w ires must be used.
Remote
monitoring
Modbus RTU
A+ B-
Vdd
GND
2x2x0,5 mm
2
A+ B-
Vdd
GND
MB_A
MB_B
2x2x0,5 mm
+24V
RS_A
RS_B
GND
If no KWL-BE ECO is
connected, the AN/I is an
analogue input and the relay
+24V
contact RM/I RM/O is a digital
RS_A
output.
RS_B
4x0,5 mm
2
GND
+11V1
AN/I
GND
RM/I
RM/O
Low press ure
Revision switch
switch
3x1,5 mm
2
D/I1
Digital input 1
D/I2
Digital input 2
11V1
10 V operating voltage
AN/I
Analog input 0-10 V DC
Potential for relay contact
RM/I
max. 24 V / 1 A
RM/O
Relay contact
EN
Fig. 18
KWL-BE
Touch
art. nr.: 20245 ws
2
2x2x0,5 mm
KWL-BE
Touch
art. nr.: 20244 sw
2
KWL-BE ECO
art. nr: 20246
0-10 V
0,2 V - 1 V = stop
2 V
- 4 V = On the road
5 V
- 7 V = at home
8 V
- 10 V = intensive
ventilation
L
PE
N
E
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