Parker 6K8 - Page 31

Chapter 1. Installation 27
2-Wire Connections (plus ground):
RS-232/485
connector
Tx+
Tx
Rx+
Rx
120 W
120 W
Shield
Unit #1
Unit #2
Unit #3
Unit #31
120 W
681W
120 W
+5VDC
Ground
681W
1
2
3
4
5
6
7
8
O
N
Pin 1 (Rx+)
Pin 7 (Rx-)
Pin 4 (Tx+)
Pin 8 (Tx-)
Pin 6 (GND)
Pin 1 (Rx+)
Pin 7 (Rx-)
Pin 4 (Tx+)
Pin 8 (Tx-)
Pin 6 (GND)
Pin 1 (Rx+)
Pin 7 (Rx-)
Pin 4 (Tx+)
Pin 8 (Tx-)
Pin 6 (GND)
Pin 1 (Rx+)
Pin 7 (Rx-)
Pin 4 (Tx+)
Pin 8 (Tx-)
Pin 6 (GND)
Master Unit
The DIP switch shown above is configured for RS-485 2-wire.
DIP switches 1-4 select internal resistor values (ON selects the resistor).
Use these resistors only for the last unit (or for a single unit).
Refer to page 5 for instructions on how to access and set the switches.