Combining channels in series to output higher voltage
Channels in series can cause hazardous voltage (>30 V
RMS
, 42 V
PEAK
) to be present and
accessible at the 2600B output connector. A safety shield must be used whenever hazardous
voltages will be present in the test circuit. To prevent electrical shock that could cause injury
or death, never use the 2600B in a test circuit that may contain hazardous voltages without a
properly installed and configured safety shield.
When combining two 2600B SMU voltage sources in series, it is possible for the SMU combination to
output hazardous voltage levels even though the individual SMUs cannot.
The following figure illustrates a Model 2602B configured with the two channels connected in series to
output up to 80 V (40 V per channel).
Whenever hazardous voltage (>30 V
RMS
, 42 V
PEAK
) is output, a safety shield must completely
surround the DUT test circuit. When using a metal safety shield, it must be connected to a known
protective earth (safety ground) and chassis ground.
Figure 19: Combining channels to output higher voltage
(1) 2602B Channel A: SMU maximum pulse voltage: +40 V
(2) 2602B Channel B: SMU maximum pulse voltage: −40 V
(3) Series SMU maximum pulse voltage (as shown): 80 V
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