Xantrex Technology XHR, XFR, XFR3 manual Internal PCB Jumper Selections

Installation and Configuration

Internal PCB Jumper Selections

Control Mode Selection” shows a table of jumper settings and OVP programming selection. Refer to “Basic Setup Procedure” on page 23 for the positions of the jumpers on the GPIB PCB.

Table 2.6 OVP Control Mode Selection

PCB Jumper	PCB Jumper	OVP Programming Selection
J65 Position	J103 Position
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

TTL You can use the Shutdown function to disable or enable the supply's output. Shutdown 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 J7 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, “J7 User Signal Connector Circuit Block Diagram” on page 31 for a schematic of the J7 connector containing the shutdown user line.

You can select the logic level of the TTL input by changing the J93 connector on the GPIB PCB. Table 2.7 shows the TTL signal levels for the J93 jumper settings. See Figure 2.2-3 for the location of the J93 jumper on the printed circuit board.

Table 2.7 Switch Settings for TTL Shutdown Circuit Logic

PCB Jumper J93 Position	TTL Signal Level	Supply Output Condition
Pin 2 to Pin 3 (default)	HIGH	OFF
	LOW	ON
Pin 1 to Pin 2	HIGH	ON
	LOW	OFF

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