Moxa Technologies MGate MB3000 Modbus Manual do Utilizador descarregar pdf (Página 41)

MGate MB3000 User’s Manual Hardware: MB3270, MB3270I

7-4

Jumpers

SW 2 SW 1

The DIP switches are located beneath the DIP switch panel on the side of the unit.

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 KΩ, 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 KΩ, set switches 1 and 2 on the port’s assigned DIP switch to

ON.

Switch 4 on the port's assigned DIP switch is reserved.

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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Moxa Technologies MGate MB3000 Modbus Manual do Utilizador Página 41