MGate MB3000 Modbus Gateway User Manual
Jumpers
To add a 120
Ω termination resistor, set switch 3 on the port’s assigned DIP switch to ON; set switch 3
to OFF (the default setting) to disable the termination resistor.
To set the pull high/low resistors to 150 K
Ω, set switches 1 and 2 on the port’s assigned DIP switch to
OFF. This is the default setting.
To set the pull high/low resistors to 1 K
Ω, set switches 1 and 2 on the port’s assigned DIP switch to
ON.
ATTENTION
Do not use the 1 KΩ pull high/low setting on the MGate MB3000 when using the RS-232 interface. Doing
so will degrade the RS-232 signals and reduce the effective communication distance.
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