15
Overview of connection boxes
You can connect up external connections via 4 connection boxes, depending on which settings you have selected in the Software.
Normal setting
A CTS400 Connection Box allows you to connect up the following functions:
Water after-heating
If you connect up a water after-heating element, it will include a box that enables you to add other connections too:
Electrical after-heating
If you connect up an electrical after-heating element, it will include a box that enables you to add other connections too:
Fire automation system
The Fire Connection Box enables you to connect the following functions:
User selection output
Fire thermostat/external fire automation system
External sensor
Modbus B1 (-)
Modbus A1 (+)
User selection 2
User selection 1
GND
GND
ATTENTION
If you are only connecting 1 function, we recommend that you purchase a LAN cable, type A, of the length required. Plug
either end of the cable into the RJ45 port on the unit. Cut off the connector at the other end of the cable and connect the
wires that are required. The colours for different connections in the connection box are listed above.
Fire thermostat/external fire automation system
Modbus B1 (-)
Modbus A1 (+)
User selection 1
GND
Fire thermostat/external fire automation system
Modbus B1 (-)
Modbus A1 (+)
Overheating
User selection 1
GND
Fire thermostat/external fire automation system
GND
User selection 1
User selection 1 (GND)
GND
Modbus A1 (+)
Modbus B1 (-)
500 mm
8
7
6
5
4
3
2
1
1
RJ45
Brown
Brown/white
Orange
Blue/white
Blue
Orange/white
Green
Green/white
500 mm
RJ45
7
5
4
2
1
500 mm
RJ45
7
5
4
3
2
1
N1
F
N
GND
GND
A1+
B1 -
S
S1
S2
S3
S4
S5
S6
1000 mm
RJ45
RJ45
RJ45