Operator Terminal System Manual - 11276916.pdf

System Manual – DOP11A Operator Terminals
Installation
RS-485 connection (DOP11A-10 and DOP11A-30 only)
If the DOP11A-10 operator terminal is connected with the frequency inverters via RS-
485, you will have to activate the terminating resistor in the 25-pin Sub-D connector of
the DOP11A-10 (jumper between pin 6 and pin 19) in case the operator terminal is the
first or last station.
There must not be any difference of potential between the units connected using the RS-
485. Take suitable measures to avoid a potential displacement, e.g. by connecting the
unit ground connectors using a separate lead.
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