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Control through a controllable resistance (poti)
The power unit can be remote-controlled by means of an external poti of 5 KOhm
over the complete output voltage range.
Proceed as follows for connection:
Connect the connecting cable of the REMOTE plug as illustrated.
Connection 1 at one end of the resistance.
Connection 2 at the centre sliding contact of the resistance.
Connection 3 at the second end of the resistance.
Switch off the switched-mode power supply and then connect the REMOTE plug to
the rear remote connection. Screw the external fastening ring.
Slide the rear VOLTAGE REMOTE
switch to the "ON" position.
Switch the switched-mode power supply on. The desired output voltage can now be
set through the external poti. Control the complete adjustment area for correct func-
tion.
If this remote control function is no longer desired, move the switch to the "OFF”
position.
Maintenance and Cleaning
The switched-mode mains power supply units are maintenance-free, apart from the
need to replace fuses and cleaning them once in a while. Use a clean, lint-free, anti-
static and dry cloth to clean the device. Do not use any abrasive or chemical deter-
gents or detergents containing solvents.
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• Now set the wiper switch (5) underneath the device to the "FIXED 13.8 V position.
• The output voltage has now been fixed to this values and cannot be changed via
the control on the front of the device. The voltage is shown on the display (9).
• To deactivate the fixed voltage, slide the wiper switch to the opposite direction.
CAUTION! Only change the setting when no consumers are connected! Verify the
operating voltages of the consumers first!
Connecting a Consumer
• Make sure the consumer is switched off.
• Verify that the correct output voltage has been set.
• Connect the plus pole (+) of the consumer to the red terminal screw connector "+"
(4) and
• the minus pole (-) of the consumer to the black terminal screw connector "-" (3).
• 4-mm standard connectors can be used for connection but should take place via
20 A by means of screw terminals (the jack heads can be screwed on to the front
only for the SPS 1525/1540 PFC!).
• For the switch power unit SPS 1560 PFC up to 5A can be connected at the front
safety-jack consumer (automatic current limit) and up to 60A at the rear through
high-current terminal jacks.
• The power consumption of the connected consumers is shown on the current dis-
play (8).
Make sure that the consumers are switched off when connected to the
switched-mode mains power supply. Sparks may be generated when
a consumer which has been switched on is connected to the jacks.
This may damage the terminal screw connectors as well as the
connected cables.
"SENSE” function (only SPS 1560 PFC)
The switched-mode power supply possesses an automatic voltage control for the
high-current output. For this, two separate measuring cables are connected parallel
to the connecting cables. The potential drop which occurs on the connecting cables
is measured on these two measuring cables. The switched-mode power supply
compensates this potential drop automatically so that the actually set voltage is pen-
ding on the consumer.
