Siemens CU240E-2 - Page 16

Installing
3.5 Terminal strips on CU240E-2 Control Units
CU240B-2 and CU240E-2 Control Units
16 Compact Operating Instructions, 01/2017, A5E39910322B AA
Additional options for wiring the digital inputs
Connecting P-switching contacts with an external
power supply
If you wish to connect the external and
the internal inverter power supply vol
t-
ages with one another, then you must
connect "GND" with termina
ls 34 and
69 at the terminals.
Connecting M-switching contacts with an external
power supply
Connect terminals 69 and 34 at the
te
rminals.