Chapter 1. Installation
5
56
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READ THIS FIRST
The “RS-232/485” connector (also referred to as “COM2”) is factory-configured for
RS-232 communication; this makes it compatible with an RP240 remote operator panel. If
you are not using RS-485 communication, skip this section and proceed to Mounting.
!
CAUTIONS
!
•
REMOVE POWER before removing the 6K’s enclosure.
•
While handling the 6K’s printed circuit assemblies, be sure to observe
proper grounding techniques to prevent electrostatic discharge (ESD).
DIP Switch
RS-485 2-Wire
RS-485 4-Wire
RS-232
8 ......... 2-wire RS-485
7 ......... 4-wire RS-485
6 ......... reserved
5 ......... Enable RS-485
4 ......... 120
Ω
Rx termination resistor
3 ......... 120
Ω
Tx termination resistor
2 ......... 681
Ω
Tx+ bias resistor
1 ......... 681
Ω
Tx- bias resistor
ON
OFF
OFF
ON
ON *
ON *
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
* For 2-wire RS-485, use switch #3 or switch #4 for 120
Ω
termination (not both).
