6.5 RESISITIVE PROGRAMMING OF OUTPUT VOLTAGE AND CURRENT LIMIT
For resistive programming, internal current sources, for Output Voltage and/or Output Current control,
ply 1mA current through external programmi
ng resistors connected between J1
& 23. The voltage across the programming resistors is used as a programming voltage for the power
10Kohm can be selected to program the Output Voltage and
A variable resistor can control the output over its entire range, or a combination of variable resistor
and series/parallel resistors can control the output over restricted portion of its range.
Perform the following procedure to
set the power supply to Resistive programming:
Turn the AC On/Off switch to Off.
Set setup switch SW1, positions 1 and 2 to their UP position.
Set SW1, position 3 to select the programming resistor range according to Table 6
Set SW1, positions 7 and 8 t
o their UP position, to enable resistive programming mode.
Connect a wire jumper between J1
Connect the programming resistors to the mating plug of J1 as shown in Fig.6
Set the programming resistors to the desired resis
tance and turn the power supply ON. Adjust the
resistors to change the power supply output.
SW1, positions 4, 5, 6 and 9 are not required for remote programming. Their settings can be d
termined according to the application requirements.
l circuits allow the user to set the Output Voltage and Output Current up to 5% over the
rated maximum value. The power supply will operate within the extended range, however it
is not recommended to operate the power supply over its voltage and curr
To maintain the temperature stability specification of the power supply, the resistors used for pr
gramming should be stable and low noise resistors, with temperature coefficient of less than
ive programming is used, front panel and computer control (via serial communication
port) of Output Voltage and Current are disabled.
3 setting and programming range
J1 connector, rear panel view
Fig.6-2: Remote resistive programming
