553BTechnical specifications
A.10 Communication interfaces
S7-1200 Programmable controller
746
System Manual, 11/2011, A5E02486680-05
PROFIBUS interface
Table A- 151 Pinout of the D-sub socket
Pin
Description
Pin
Description
1
- not used -
6
VP: Power 5 V only for bus
terminating resistors;
not for supplying external devices
2
- not used -
7
- not used -
3
RxD/TxD-P: Data line B
8
RxD/TxD-N: Data line A
4
CNTR-P: RTS
9
- not used -
5
DGND: Ground for data signals
and VP
Housing Ground connector
PROFIBUS cable
NOTICE
Contacting the shield of the PROFIBUS cable
The shield of the PROFIBUS cable must be contacted.
To do this, strip the insulation from the end of the PROFIBUS cable and connect the shield
to functional earth.
A.10.2
GPRS
Note
S7-1200 PROFIBUS CMs and the GPRS CP are not approved for Maritime applications
The following modules do not have Maritime approval:
CM 1242-5 PROFIBUS Slave module
CM 1243-5 PROFIBUS Master module
CP 1242-7 GPRS module
Note
To use these modules, your CPU firmware must be V2.0 or higher.