Connecting hardware
3.1 The PC adapter for SIMATIC RF-DIAG
SIMATIC RF-DIAG
Operating Manual, 09/2012, C79000-G8976-C292-01
13
Highlights
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Diagnostics via a PC with the reader supplied with power from the system
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IP65 degree of protection
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Can be used in high temperature ranges
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Use in productive operation possible
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Switchover to diagnostics mode "on the fly" (parallel to regular operation)
Note
Protection from environmental influences
The IP65 degree of protection of the PC adapter is only valid if the USB protective cap is
fitted and the corresponding RS-422 cable is connected. During diagnostics, this degree of
protection is not present.
3.1.2
Pin assignment of the RS-422 interface
Pin assignment for connection to the CM or wide-range power supply unit
Pin assignment of the connector for PC adapter and CM or wide-range power supply unit
Table 3- 1
RS-422 interface of the PC adapter (male connector)
Pin
Pin
Device end 8-
pin M12
Assignment for
CM
Assignment for
wide-range power
supply unit
1
+ 24 V
+ 24 V
2
- Transmit
Free
3
0 V
0 V
4
+ Transmit
Free
5
+ Receive
Free
6
- Receive
Free
7
Free
Free
8
Ground (shield)
Ground (shield)
The knurled bolt of the M12 plug does not contact the shield (reader end).