Switching On The Bus Termination - ABB FSCA-01 User Manual

Switching on the bus termination

Bus termination is required to prevent signal reflections from the
bus cable ends. The adapter module is equipped with internal bus
termination, which is configurable with jumper J2 pins.
Activate the termination on the devices located at the bus ends
and deactivate it on the other devices. See the figure below.
J2
Termination
activated
RS-485
device
Term.
ON
J2
Termination
deactivated
RS-485
device
Term.
OFF
Electrical installation 31
J2
Termination
deactivated
RS-485
device
Term.
OFF
J2
Termination
activated
RS-485
device
Term.
ON