Specifications

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3-5. RS232/485 SELECTION

The jumper settings are as follows:

(1) COM 1 & COM4 (RS232)

J10

RS-232

Factory Preset

(2) COM 4(RS485)

J10

RS-485

(3) RS-485 Terminator Select (J8)

When there is only one line the setting should be left, but if you are using multiple blocks on a

single line. This should be set to “ON” in order to properly terminate the connection for better

transmission of data.

Factory Preset

Figure 0-6 J9: RS-485 Terminator Select

3-6. DOC MEMORY

(1) DOC Memory Mapping Selection (JP5)

A 32-pin DOC socket supports a DOC (Disk-on-Chip) up to 72Mb. This PnP Flash ROM DOC

can be installed as one of the user’s hard disk drive. And if set as Drive C, it can be used to boot

up the computer with MS-DOS installed. It offers much faster access than a floppy or hard disk

and greatly increases reliability under harsh environment.

The DOC Memory Mapping is as follows:

Place 1-2 :D000h

Place 2-3 :D400h

Don’t Place :D800h

Factory Preset

OFF ON