Xantrex GPIB-XPD, Руководство по эксплуатации

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Installation and Configuration
Internal PCB Jumper Selections
24
Operating Manual for GPIB for XPD Series Power Supply
the front panel LOCAL switch, 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 2.5, on page
22 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. 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 2.6, “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 GPIB PCB.
Table 2.6 OVP Control Mode Selection
TTL
Shutdown
You can use the Shutdown function to disable or enable the supply's output.
Disabling the supply using TTL shutdown allows you to make adjustments to the
load or to the power supply without shutting down the power supply. With the
GPIB interface installed, TTL shutdown is activated by a TTL signal to Pin 1 of the
J21 connector on the interface subplate. The shutdown user line uses a 0-5Vdc TTL
input with a high signal range of 2.2-5.0Vdc. The current range of the shutdown
line is 1-10mA. See Figure 2.5, “J21 User Signal Connector Circuit Block
Diagram” on page 27 for a schematic of the J21 connector containing the shutdown
user line.
You can select the logic level of the TTL input by changing the J3 connector on the
GPIB PCB. Table 2.7 shows the TTL signal levels for the J3 jumper settings. See
Figure 2.2-3 for the location of the J3 jumper 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