Manual and Data Sheet NSE Version 1.0
Variotech – Emergency power supply unit NSE Version 1.0
Date: 10.01.14, Page 6 of 7
Getting started:
This description for the commissioning relates only to the power supply NSE and not to the
type-tested A3 safety control as well as not to the mechanical A3 brake element.
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Inspection of the correct mechanical fixation of the NSE
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Inspection of all connections and terminals according to schematics and documentation
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Check the correct connection voltage of terminals 1 and 2 (13.6 VDC)
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Input of terminal 3 (Power ok) must be checked against plus (+) of the power supply, which must
be 13,4 VDC if correct power is supplied.
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The input to terminals 4 and 5 must be open in case of A3 error (as well as in the test mode) and
closed in normal operation.
Note: The A3 brake element (coil) can be supplied only when the terminals 4 and 5 have the same
potential, which is only then when they are connected via a relay contact in the A3 safety control.
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Check the correct connection voltage at the terminals 6 and 7.
It must be 24VDC (+ / -1V). The voltage is used to supply the ENA3 safety control.
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Output terminal 8, Reset function for A3 safety control
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Terminal 9, output to forward the feedback contact of A3 safety control.
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Check the correct output voltage of 13.6 VDC at the terminals 10 and 11
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The output at terminals 12 and 13 (battery monitoring) can be tested with a continuity tester. If the
battery is OK, the two terminals have the same potential.
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Check the correct connection of the emergency rescue button to terminals 14 and 15 with a
continuity tester
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Terminal 16 and 17, Connection of the indication of the coil status.
If the coil is active, the voltage must be about 12V.
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Check the correct connection voltage at the terminals 18 and 19.
It must be about 24VDC. The voltage is used to supply the A3 brake element (coil with anchor).
After the coil release the anchor a reduced voltage of about 12V can be measured.
The position of the released anchor is detected by analysis of the feedback switch.
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At terminals 20 and 21 connects the feedback switch of the A3 brake element.
Troubleshooting
:
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Similarly as described in the "Getting Started" section, all connections must be controlled.
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A frequent cause of error is a defective battery, this should therefore be checked first. You can
check the function of the battery by turning off the power supply during an idle state of the lift and
then checking whether the coil of the A3 brake element continues to be supplied and whether
battery voltage remains stable over 12V.
Maintenance:
There are no direct services or maintenance measures necessary.
The power supply unit NSE must always be kept clean and dry.
The battery should be replaced periodically in accordance with the data sheet of the manufacturer.
It must be ensured that the power supply NSE is replaced after an operating period of 20 years
because the specified product life cycle of the power supply unit NSE has been reached or exceeded.