Siemens CU240B-2 - Page 94

Installing
4.6 Installing Control Unit
Converter with the CU240B-2 and CU240E-2 Control Units
94 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Additional options for wiring the digital inputs
Connecting P-switching co
ntacts with an external
power supply
You must remove the jumper b
etween
terminals 28 and 69 if it is necessary to
have electrical isolation between the exte
r-
nal power supply and the internal inverter
power su
pply.
Connecting M
-
switching contacts with an external
power supply
It is not permissible that terminals 28 and
69 are connected with one a
nother.