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Installation and Configuration
User Options and Settings
28 Operating Manual for RS-232 for XPD Series Power Supply
User Options and Settings
You can customize remote operation settings for OVP (over voltage protection)
control and TTL shutdown by changing jumper positions on the RS-232 PCB.
Refer to the operating manual for information on how to use over voltage
protection and TTL shutdown.
OVP
Selection
Over voltage protection (OVP) on the RS-232 interface is set at the factory for
remote software operation. When operating the power supply in remote mode, you
control the OVP trip level using the OVSET software command. If you return the
power supply to local operation by using the REM software command, control of
the OVP trip level changes from software control to the front panel OVP
potentiometer. The default OVP trip level is set as 110% of the power supply's
rated output voltage. See Table 2.10, on page 24 for a complete list of remote
power ON default settings.
You can isolate the location of OVP control by changing the positions of the Local
OVP Control jumper J2 and the Remote OVP Control jumper J20, both on the
RS-232 interface PCB. The default jumper settings allow control of OVP to depend
on the operating state of the power supply. By physically changing the jumper
settings, you can isolate the location of OVP control to software control only or
front panel control only. Table 2.12, “OVP Control Mode Selection” shows a table
of jumper settings and OVP programming selection. Refer to “Basic Setup
Procedure” on page 19 for the positions of the jumpers on the RS-232 PCB.
Table 2.12 OVP Control Mode Selection
!
CAUTION
If you remove the unit's cover, use proper static control techniques to avoid damage
to static-sensitive components on the printed circuit board.
PCB Jumper J2
Position
PCB Jumper
J20 Position
OVP Programming Selection
Closed (default) Closed (default) Software or Front Panel OVP control
(dependent on the power supply operating state)
Closed Open Software OVP control only
Open Closed Front Panel OVP control only
Open Open Front Panel OVP control only