Applications; Parallel And Serial Mode; Serial Mode - R&S NGE-K101 User Manual

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R&S NGE100B

7 Applications

7.1 Parallel and Serial Mode

7.1.1 Serial Mode

User Manual 5601.1343.02 ─ 02
It is assumed that only qualified and trained personnel service the power supplies and
the connected loads.
Use only the R&S NGE100B power supply series when operating the channels in a
serial or parallel mode to increase the output voltage and current.
Serial connection
A serial connection may cause dangerous voltages.
To increase output voltage and currents, it is possible to operate the channels in serial
or parallel mode. In general, the output voltages of R&S NGE100B to be combined are
independent.
This type of interconnection adds the individual output voltages. The same current
flows through all outputs. The current limits for the outputs wired in series should be
set to the identical value. If one of the outputs exceeded the current limit, the total volt-
age will naturally collapse. See
It is advisable to set the voltages of all connected channels voltages to a similar value
to distribute the loads evenly (not absolutely necessary). When all three channels are
connected in a serial mode and if a (low resistance) load is connected; there is a
chance of damaging a channel when that channel is switch off. This is due to the pro-
tection diode working as a bypass to connect the other channel in a serial mode. Once
the protection diode is shorted, the channel will be defective.
Therefore, it is necessary to always have all channels or no channel at all switched on.
If the instrument switches to constant current output mode (CC) during a serial connec-
tion, the voltage display becomes inaccurate.
Allice Messtechnik GmbH
Chapter 5.3, "Output Modes",
Applications
Parallel and Serial Mode
on page 34.
98