Firmware V6.6.9
29.07.2020
65/147
COM3 / Modbus (RS485 via COMBICON terminal block)
Terminal No.
Function
Wire colour
34*
33*
32
31
RS485 +
RS485 -
GND
SHIELD (Shield)
white
brown
green
shield
7.1.7 Terminal assignment of communication interfaces
Warning about dangerous electrical voltage!
If mains voltage is connected to the Modbus terminals,
this will result in the destruction of all components connected to the Modbus!
Modbus supply lines must be shielded (cable type: J-Y(ST)Y 2x2x0.8 mm
2
)! As a general rule, care
should be taken to ensure that signal cables and cables carrying mains voltage are routed in separate
cable channels
* A terminating resistor of
100 ohms is already permanently installed
(integrated) between terminals
33 and 34 in the system centre.
Thus, any termination at these terminals must
not
be performed, i.e. is not required!
A terminating resistor of 100 ohms
must
only be installed
at the end of the Modbus
(see illustration,
on the right)!
The functions of the communication interfaces are configured in Menu 4-1-5.
