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3. Description
(fig. 1)
1. front plate
2. screw terminals (red = +, black = -)
3. connection terminals for insulated wires up to max. 2.5mm²
4. power on/off
5. power control LED
6. overload, short-circuit control LED
7. output voltage control
8. DC current analogue meter
9. DC voltage analogue meter
10. back plate
11. air intake
12. fuse holder
13. power cable
4. Connection
Insert the power plug into the mains and switch on the device. During normal operation, i.e. without overload or short-
circuit, only the power control LED (5) will light. The overload control LED (6) will not burn. During operation without
load, the voltmeter will indicate a voltage value, depending on the output voltage setting (7).
The screw terminals (+ en -) are destined to be used with high output currents up to max. 20A (PS920) or 25A
(PS925) (30A for less than 5 minutes). The connection terminals must be used with a current less than 3A. Make
sure the connection wire gauge can handle the current.
ATTENTION: A long-term operation with a nominal load (12V / 20A (PS920) or 12V / 25A (PS925)) or short-circuit
and overload (max. 30A) can cause the device to heat up. Make sure to use your PS920 / PS925 in a
well-ventilated room. Never cover the air intake and the vent holes on top of the device.
When making the connection, make sure the device is switched off. A switched-on device can, when
connecting the terminals, cause sparks. These sparks can harm the connection terminals, screw
terminals and wires.
5. Gebruik
With your PS920 / PS925 the output voltage between 3VDC and 15VDC can be adjusted continuously with a
maximum current of 20A (PS920) or 25A (PS925). This device can be ideally used professionally, recreationally and
in school. A built-in thermally controlled fan will protect the device against thermal overloads. An electronic circuit
protects the power supply against overloads and short-circuits.
PS920 / PS925
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VELLEMAN
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