P3F - Pakscan Master Station Technical Manual
16 of 82
Publication S703E V1.1
Issue 06/09
Port Function
The two DIP switches allow each port to be selected between RS232 and RS485. For RS485
slide the appropriate Port switch up, for RS232 they should be down.
Each of the two ports may be set independently.
Port Termination Resistors
The two DIP switches are used to connect end of line termination resistors and biasing resistors
to the RS485 network. All RS485 network highways should be terminated at
both ends of the
highway
. Each port can be terminated independently.
Fig 11: Port Function Switches shown in RS232 position
Fig 12: Port Termination Switches shown in Off position
1k
1k
120
