Siemens SIMATIC PANEL PC 877 - Manual (Page 203)

Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
17-11
Ethernet RJ45 connection, X700
Ethernet RJ45 connection
PinNo. Abbreviation Meaning Input/Output
1 TD+ Transmitted data Output
2 TD- Transmitted data Output
3 RD+ Received data Input
4, 5 1) SYMR Internal 75 Ohm terminating
resistor
–
6 RD- Received data Input
7, 8 1) SYMT Internal 75 Ohm terminating
resistor
–
S Shielding –
Yellow LED Connection –
Green LED Activity –
1) is not necessary for data transfer