2 Hardware Configuration
The DSCLP-200/300 is automatically configured at boot time by the computer's BIOS or operating system. There are no required switches or jumpers to set for installation.
This chapter lists a number of optional jumper settings that control various hardware features. Jumpers J1-J4, located in a column near the D-type connector (D-25 for DSCLP, D-9 for SSCLP), control the RS-422 or RS-485 signal line termination. Jumpers J5-J8, located in a column just to the right of J1-J4, control how signals are routed from the UARTs to the connector, as well as full- or half- duplex operation. Jumpers J10-J22, grouped together at the end of the board opposite the D-type connector (D-25 for DSCLP, D-9 for SSCLP), control special options.
Any changes from the factory default should be made before installing the DSCLP-200/300 in the computer. These settings can also be changed in Device Manager under Windows operating systems.
2.1 RS-422 or RS-485 Signal Line Termination
Jumpers J6-J9 allow the selection of 100-ohm RS-422 termination,
120-ohm RS-485 termination, or no termination at all. The factory default, shown in Figure 1, is RS-422 termination. For full details, see section 7.6.
Jumpers J6-J9
2 
4
RS-422 termination
(100 ohms)
(factory default)
Figure 1 --- Factory default signal termination settings
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