Pepperl+Fuchs LB Series Manual page 24

LB Remote I/O System
Installation
Pinning on Sub-D Plugs
Pin 1 Optional shield
Pin 2 -
Pin 3 (B) RxD/TxD-P (+) receive/send data P
Pin 4 Optional control signal P
Pin 5 GND reference potential
Pin 6 + 5 V, only at the end of the line
Pin 7 -
Pin 8 (A) RxD/TxD-N (-) receive/send data N
Pin 9 Optional control signal N
When installing, make sure that the transmitting and receiving lines at pin 3 and pin 8 have not
been swapped. If the lines have been swapped, the remote I/O station cannot be reached via
the fieldbus. If the lines were swapped when looping through, all nodes after this point cannot
be reached via the fieldbus.
Activating the Terminator
The fieldbus must have exactly two terminators per segment, one at the start and one at the
end. A segment usually starts at the master, while the last remote I/O unit is taken to be the end
of the segment.
Insert a terminator into the last remote I/O unit of each bus line. We recommend using sub-D
sockets with an integrated, connectible terminator. See chapter 2.6.1
Figure 3.2
24
9 8 7 6
5 4 3 2 1
1
2
3
4
5
Connections on the right-hand side