Moxa CP-138U-I-T Manual de usuario descargar pdf (Pagina 24)

Universal PCI Board User’s Manual Hardware Installation

2-11

CP-112UL/CP-112UL-I

JP1

JP2

JP1

JP2

Onboard termination resistors can be activated individually for each serial port using jumpers JP1

and JP2. JP1 corresponds to serial port 1. Short the jumper pins to activate the termination resistor;

leave the jumper pins open to bypass the termination resistor. The onboard DIP switches, S1, S2, and

S3, are used to select RS-232, RS-422, or RS-485 mode for each serial port. Switch 1 corresponds to

port 1 and switch 2 corresponds to port 2. S1 selects between RS-232, S2 selects between RS-422,

and S3 selects between 2-wire and 4-wire RS-485, as follows:

Mode S1 S2 S3

RS-232 ON -- --

RS-422 OFF ON --

4-Wire RS-485 OFF OFF ON

2-Wire RS-485 OFF OFF OFF

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Moxa CP-138U-I-T Manual de usuario Pagina 24