Reference
14 PS280 & PS283 User Manual
5V FIXED 3A
GND GND
SLAVE MASTER
Load 2 Load 1
0 to 2A (PS280)
0 to 1A (PS283)
–5V
3A
–5 TO +25V
Load 3
0 to 2A (PS280)
0 to 1A (PS283)
–5 TO +25V
Figure 5: Independent Common Ground-Referenced Application
In this configuration, each of the variable power supplies can be
varied from –5V to +25 V (+30V overall). The GND post becomes
the relative negative terminal for both variable outputs. Because the
variable power supplies are referenced to –5V, the LED display,
when set to display volts, shows a value that is five volts lower than
the actual output.
For example, the LED display indicates:
H0V when the output is –5 V
H5V when the output is 0 V
H30V when the output is 25 V
Negative 5V is available between GND and the negative terminal of
the FIXED 5V power supply.
To test a circuit in the independently ground-referenced mode,
follow these steps:
1. Turn the POWER off to the PS280 or PS283.
2. Connect the outputs as shown in Figure 5.
3. Set both variable supply VOLTAGE controls to the minimum
setting.