Siemens SINAMICS Series Operating Instructions Manual page 230

Additional system components
7.4 Terminal Module TM15
7.4.3.5 X521 bidirectional digital inputs/outputs
Table 7- 26
Connector
L2+: A 24 V DC power supply for DI/DO 8 to 15 (second potential group) must always be
1
connected if at least one DI/DO of the potential group is used as output.
M2: A ground reference for DI/DO 8 to 15 (second potential group) must always be connected if at
least one DI/DO of the potential group is used as either input or output.
DI/DO: Bidirectional digital input/output
7.4.3.6 X522 bidirectional digital inputs/outputs
Table 7- 27
Connector
L3+: A 24 V DC power supply for DI/DO 16 to 23 (third potential group) must always be connected
1
if at least one DI/DO of the potential group is used as output.
M3: A ground reference for DI/DO 16 to 23 (third potential group) must always be connected if at
least one DI/DO of the potential group is used as either input or output.
DI/DO: Bidirectional digital input/output
228
Screw terminal X521
Terminal Designation
1 L2+
2 DI/DO 8
3 DI/DO 9
4 DI/DO 10
5 DI/DO 11
6 DI/DO 12
7 DI/DO 13
8 DI/DO 14
9 DI/DO 15
10 M2 (GND)
Screw terminal X522
Terminal Designation
1 L3+
2 DI/DO 16
3 DI/DO 17
4 DI/DO 18
5 DI/DO 19
6 DI/DO 20
7 DI/DO 21
8 DI/DO 22
9 DI/DO 23
10 M3 (GND)
Technical specifications
1
See Section
"Technical specifications"
Technical specifications
1
See Section
"Technical specifications"
Operating Instructions, 12/2018, A5E34763375A
SINAMICS DCM DC Converter