Connecting Cables; X27 (Rs 422/485) Interface Of The Cp 440; Cables - Siemens SIMATIC S7-400 Equipment Manual

Connecting cables

11.1

X27 (RS 422/485) Interface of the CP 440

Pin Assignment
8
15
The table below shows the pin assignment for the 15-pin subminiature D female connector in
7
14
6
the front panel of the CP 440.
13
5
12 4
Table 11-1 Pin Assignment for the 15-Pin Subminiature D Female Connector of the Integrated Interface of the CP 440
11
3
10
2
Female connector on
9
1
CP 440-RS 422/485
*
* View from the front
11.2

Cables

Connecting cables
If you make your own connecting cables you must remember that unconnected inputs at the
communication partner may have to be connected to open-circuit potential.
Point-to-point connection CP 440 Installation and Parameter Assignment
Equipment Manual, 03/2022, A5E00057742-AE
Pin Designation
1 -
2 T (A)-
3 -
4 R (A)/T (A)-
5 -
6 -
7 -
8 GND
9 T (B)+
10 -
11 R (B)/T (B)+
12 -
13 -
14 -
15 -
Input/Output Meaning
- -
Output Transmitted data (four-wire operation)
- -
Input Received data (four-wire operation)
Input/Output Received/transmitted data (two-wire opera‐
tion)
- -
- -
- -
- Functional ground (isolated)
Output Transmitted data (four-wire operation)
- -
Input Received data (four-wire operation)
Input/Output Received/transmitted data (two-wire opera‐
tion)
- -
- -
- -
- -
11
127