![Siemens SIMATIC RF640A System Manual Download Page 152](http://html.mh-extra.com/html/siemens/simatic-rf640a/simatic-rf640a_system-manual_374419152.webp)
Readers
5.4 SIMATIC RF680R
SIMATIC RF600
152
System Manual, 11/2018, J31069-D0171-U001-A21-7618
Voltage infeed from external source with various voltages
Figure 5-25 Circuit example 6: Digital outputs
5.4.1.5
Pin assignment of the RS422 interface (X80 DC24V)
Table 5- 28 Pin assignment of the RS422 interface (reader end)
Interface view
Pin
Device end
8-pin M12
Wire colors
Assignment
1
White
+ 24 V
2
1)
Brown
- Transmit
3
Green
0 V
4
1)
Yellow
+ Transmit
5
1)
Gray
+ Receive
6
1)
Pink
- Receive
7
--
Unassigned
8
--
Earth (shield)
1)
These pins are not required if the reader is operated via Ethernet.