User's Manual
NPort W2150A/W2250A Series Getting Started
2-4
Pull High/Low Resistors for RS-422/485
You may need to set the pull high/low resistors when termination resistors are used for certain RS-422 or
RS-485 environments.
S2 (Serial 1)
S3 (Serial 2)
DIP 1
Pull high resistor
DIP 2
Pull low resistor
DIP 3
Terminal resistor
DIP 4
Reserved
ON .ƻ .ƻ ƻ –
OFF .ƻ .ƻ *N/A –
*Default
S3 is for NPort W2250A only
ATTENTION
'RQRWXVHWKH.ƻVHWWLQJZKLOHLQ56-232 mode. Doing so will degrade the RS-232 signals and reduce the
effective communication distance.