Example: Gateway and two ventilation units
The example below shows an installation with two units in the same building. It shows the gateway
installed in a mounting box.
D
1
+
D
1
+
D
1
-
D
1
-
G
N
D
G
N
D
D
1
+
D
1
-
G
N
D
D
0
+
D
0
+
D
0
-
D
0
-
G
N
D
G
N
D
D
0
+
D
0
-
G
N
D
Data+
Data-
Internet
LL N
N PE
P
E
L N PE
2*Modbus
PE +
skærm
L N
DC + (1)
DC – (3)
CN7
Data1+ (A1)
Data2+ (A2)
GND
12Vdc+
Data1- (/B1)
Data2- (/B2)
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
Anlæg 2
Styring
Data+
Data-
CN7
Data1+ (A1)
Data2+ (A2)
GND
12Vdc+
Data1- (/B1)
Data2- (/B2)
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
Anlæg 1
Styring
Data+
Data-
PWR
D+ (2)
D- (1)
GND (5)
GATEWAY
PSU 12V
Skærm
120 Ohm
terminering
120 Ohm
terminering
230VAC
CAUTION
For this solution all ventilation units and the gateway must have joint ground potential.
If they do not have joint ground potential, an insulated repeater must be installed between each unit.
Ground enamelled wires at the gateway.
Example: Gateway and two ventilation units in separate buildings
The example below shows an installation with two units in separate buildings. It shows the gateway
installed in a mounting box.
D
1
+
D
1
+
D
1
-
D
1
-
G
N
D
G
N
D
D
1
+
D
1
-
G
N
D
D
0
+
D
0
+
D
0
-
D
0
-
G
N
D
G
N
D
D
0
+
D
0
-
G
N
D
Data+
Data-
Internet
230VAC
LL N
N PE
P
E
L N PE
2*Modbus
PE +
skærm
L N
DC + (1)
DC – (3)
CN7
Data1+ (A1)
Data2+ (A2)
GND
12Vdc+
Data1- (/B1)
Data2- (/B2)
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
Anlæg 2
Styring
Data+
Data-
CN7
Data1+ (A1)
Data2+ (A2)
GND
12Vdc+
Data1- (/B1)
Data2- (/B2)
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
Anlæg 1
Styring
Data+
Data-
PWR
D+ (2)
D- (1)
GND (5)
GATEWAY
PSU – 12V
120 Ohm
terminering
Da
ta
+
Da
ta
-
Repeater
Da
ta
+
Da
ta
-
Da
ta
+
Da
ta
-
Repeater
Da
ta
+
Da
ta
-
Da
ta
+
Da
ta
-
Repeater
12
V
dc+
G
N
D
12Vdc+
GND
Da
ta
+
Da
ta
-
12
V
dc+
G
N
D
GND
12Vdc+
120 Ohm
terminering
In the example above there is an insulated repeater between each unit. The reason for this is that they
have different ground potentials. You thereby avoid that a potential short circuit of a unit is
transmitted to the rest of the system.
Ground enamelled wires at the gateway.
8