Series & parallel wiring
Chris Armstrong
Last Update pred enim letom
Depending on the model and the exact configuration, the wiring for series and parallel configurations may differ. Let’s start with the linear power supplies and focus on the SPD3000X and SPD4000X series. For series connections, the SPD3000X models use channels 1 & 2 together as shown in the table above. To connect to the device under test with the supply channels in series, set the power supply mode from the front panel to “series” and then connect to the black terminal of channel 1 and the red terminal of channel 2 like so:
Use the channel 1 settings to control this combined channel in series or parallel mode. In parallel mode, the SPD3000X should wire only to channel 1, but both channels appear here in parallel when the mode is set:
The SPD4000X models use channels 2 and 3 for series
and parallel modes. To connect in series mode, set the mode from the front
panel and then connect to the CH2 positive (red) terminal and the CH3 negative
(black) terminal. Note that this is oriented differently than the SPD3000X:
On the SPD4000X, use the channel 2 settings to control this combined channel in series or parallel mode and make measurements.
For parallel connections, the SPD4000X uses the channel 2 terminals as shown in the image above. The SPD3000X uses channel 1 terminals.
For the switching power supplies, we make the connections externally. These supplies require an analog cable connection to establish the series or parallel mode between instruments. Then, the connections are made like this in series and parallel mode:
