Installation: Assembly, connection and start-up
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2.7.7 Video power supply unit 1 4874
Assembly
Remove the unit and the supplied components from the packaging.
Connection
Note:
Thermal fuses
The video power supply unit 1 4874 has an electronic fuse that interrupts the power circuit if an
overload occurs rather than conventional melting fuses. If this fuse activates, the associated voltage
indicator LED goes off. Proceed as follows to switch on again:
Switch mains voltage off and leave off for approximately 1 minute.
Remedy short circuit or overload.
Switch mains power supply on again.
The associated voltage indicator LED illuminates again.
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