Kistler-Morse KM STXPlus - Manual (Page 9)

CHAPTER 2: HARDWARE INSTALLATION
Enabling the Modbus 5.11kΩ Pull-Up
Resistor and 12kΩ End-Of-Line Resistor
These jumpers enable and disable the
pull-up resisor and the end-of-line resistor.
The pull-up resistor is used where there is a
long cable run causing a loss of
communications. The end-of-line resistor is
used on the last device in the serial chain.
Changing from RS-422 to RS-485
SW5 changes the Serial 1 port protocol from
RS422 to RS485.
4-20mA Output
D30 will light when a device/multimeter is
wired to the current output terminals. The
LED will be much brighter with 20mA and
less bright with 4mA.
2-4