Moxa CP-112UL-DB9M [15/131] Universal pci board hardware installation

Universal PCI Board Hardware Installation

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Onboard termination resistors can be activated individually for each serial port using jumpers JP1 through JP8.

For CP-138U-I, JP1/2/3/4/5/6/7/8 corresponds to serial port 1/2/3/4/5/6/7/8, respectively. For CP-138U,

JP1/2/3/4/5/6/7/8 corresponds to serial port 8/7/6/5/4/3/2/1, respectively. Short the jumper pins to activate

the termination resistor; leave the jumper pins open to bypass the termination resistor.

The onboard DIP switches, S1 and S2, are used to select RS-422 or RS-485 mode for each serial port. There are

8 switches on each bank corresponding to the 8 serial ports. S2 selects between RS-422 and RS-485; S1

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

Mode S1 S2

RS-422 --- ON

4-wire RS-485 ON OFF

2-wire RS-485 OFF OFF