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Siemens SIMATIC S7-1200 Manual page 273

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Technical specifications
Effective power loss (typical)
from 24 V DC
from the S7-1200 backplane bus
Power supply 24 VDC / external
Min. cable cross section
Max. cable cross section
Tightening torque of the screw terminals
Dimensions and weights
Width
Height
Depth
Weight
Net weight
Weight including packaging
*
The current load of an external consumer connected between VP (pin 6) and DGND (pin 5) must not exceed a maximum
)
of 15 mA (short-circuit proof) for bus termination.
PROFIBUS interface
Table A- 57
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.
Easy Book
Manual, 11/2011, A5E02486774-04
Pinout of the D-sub socket
Pin
Description
1
- not used -
2
- not used -
3
RxD/TxD-P: Data line B
4
CNTR-P: RTS
5
DGND: Ground for data signals
and VP
2.4 W
0 W
min.: 0.14 mm
(AWG 25)
2
max.: 1.5 mm
(AWG 15)
2
0.45 Nm (4 lb-in)
30 mm
100 mm
75 mm
134 g
171 g
Pin
6
VP: Power supply +5 V only for bus
terminating resistors;
not for supplying external devices
7
- not used -
8
RxD/TxD-N: Data line A
9
- not used -
Housing
Ground connector
Technical specifications
A.8 Communication interfaces
Description
273
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