User's Manual
Table Of Contents
- 1. Introduction
- 2. Getting Started
- 3. Initial IP Configuration
- 4. Introduction to Operation Modes
- 5. Web Console: Basic Settings
- 6. Web Console: Network Settings
- 7. Web Console: Serial Port Settings
- 8. Web Console: System Management
- 9. Web Console: System Monitoring
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 1 KΩ 1 KΩ 120 Ω -----
OFF *150 KΩ *150 KΩ *N/A -----
*Default
S3 is for NPort W2250A only
ATTENTION
Do not use the 1 KΩ setting while in RS
-232 mode. Doing so will degrade the RS-
232 signals and reduce the
effective communication distance.