Detailed descriptions
16.1 Motherboard
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
133
PROFINET LAN X1 Port P1, P2, P3
PROFINET interface
/('
/('
Pinno.
Short name
Meaning
Input / output
1
RD+
Receive data *
Input
2
RD-
Receive data *
Input
3
TD+
Send data *
Output
4, 5
1)
SYMR
Internal 75 Ohm terminating resistor
_
6
TD-
Receive data *
Output
7, 8
1)
SYMT-
Internal 75 Ohm terminating resistor
_
S
Shield
LED 1
Lit green: link
LED 2
Lights up yellow: actvity
* Auto negotiation and auto crossover supported