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• Do not leave mains power supplies and the connected consumers in operation
unattended.
• Exclusively use fuses of the type and rated current specified. It is absolutely imper-
missible to use repaired fuses.
• Avoid the use of uninsulated metallic cables.
• It is impermissible to connect multiple switched-mode mains power supply units in
series or in parallel.
• Power supply units are not designed for application to human beings or animals.
• If you have reasons to assume that safe operation is no longer possible, immedia-
tely take the device out of operation and secure it against inadvertent operation.
Reasons to assume that safe operation is no longer possible include:
- there is visible evidence that the device has been damaged
- the device does not work any longer
- the device has been stored for long periods of time under unfavourable conditions
or
- it was subject to considerable stress during transport.
• You should also heed the additional safety instructions in each chapter of these
operating instructions as well as in the operating instructions of the connected
devices.
Functional Description
The SPS 1525 PFC and SPS 1540 PFC mains power supply units use switching net-
work technology with the advantages of weight and size reductions. Switched-mode
mains power supply units use chopped mains voltages and return a broad spectrum
of harmonic waves to the mains line, which may cause interference in other devices.
To suppress these harmonic waves, a PFC (Power Factor Correction) has been inte-
grated in the two device models.
The dc output is dc-isolated and features a fuse disconnector to the mains voltage.
The output voltage can be adjusted by means of the adjustment control (6) from 3 V
to 15 V DC or for the SPS 1560 from 1V – 15Vm; current limitation is not possible.
A special feature of the models SPS 1525 PFC und SPS 1540 PFC is a fixed voltage
switch on the underside of the device to fix the output voltage to 13.8 VDC.
