Siemens SIMATIC TDC - Page 96

CPU modules
4.2 CPU module CPU550/CPU551
SIMATIC TDC hardware
96 System Manual, 08/2017, A5E01114865-AL
Digital inputs (X2)
An interface module is connected to the 10-pin RJ-45 socket with polarity reversal protection
via cable SC66.
Table 4- 9 Pin assignment X2 and cable SC66
X2
SC66
PIN
Designation
PIN CPU side
PIN PC side
1
Ground
n.c.
n.c.
2
Digital input 0 (supports interrupts)
2
1
3 Digital input 1 (supports interrupts) 3 2
4
Digital input 2 (supports interrupts)
4
3
5 Digital input 3 (supports interrupts) 5 4
6
Digital input 4
6
5
7
Digital input 5
7
6
8
Digital input 6
8
7
9
Digital input 7
9
8
10
Ground
10
10
n.c.: n.c.
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