4. Setting up the device
30
The interface
RS485
is connected via a screened data line with twisted wires
(Twisted
-
Pair). On each end of the bus segment a termination of the bus lines needs to be
connected. This is neccessary to ensure a secure data transfer to the bus. For this a
resistance (120 Ohm) is interposed between the lines Data B (+) and Data A (–).
4.5. Interfaces RS232 and RS485
