NOTE: Primary overcurrent protecon is provided by the building circuit breaker. This breaker
must protect against excess currents, short circuits, and earth grounding faults in accordance
with NEC ANSI/NFPA 70.
• Ensure that the polarity of the DC input wiring is correct. Under certain condions, connecons with
reversed polarity might trip the primary circuit breaker or damage the equipment.
• The marked input voltage of –48 VDC for a DC-powered device is the nominal voltage associated
with the baîš‚ery circuit, and any higher voltages are only to be associated with î™™oat voltages for the
charging funcon.
• Because the device is a posive ground system, you must connect the posive lead to the terminal
labeled RTN, the negave lead to the terminal labeled –48 VDC, and the earth ground to the device
grounding points.
DC Power Disconnecon Warning
WARNING: Before performing any of the DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is o, locate the circuit breaker
on the panel board that services the DC circuit, switch the circuit breaker to the OFF
posion, and tape the device handle of the circuit breaker in the OFF posion.
Waarschuwing Voordat u een van de onderstaande procedures uitvoert, dient u te
controleren of de stroom naar het gelijkstroom circuit uitgeschakeld is. Om u ervan te
verzekeren dat alle stroom UIT is geschakeld, kiest u op het schakelbord de
stroomverbreker die het gelijkstroom circuit bedient, draait de stroomverbreker naar de
UIT posie en plakt de schakelaarhendel van de stroomverbreker met plakband in de
UIT posie vast.
Varoitus Varmista, eä tasavirtapiirissä ei ole virtaa ennen seuraavien toimenpiteiden
suoriamista. Varmistaaksesi, eä virta on KATKAISTU täysin, paikanna tasavirrasta
huolehvassa kojetaulussa sijaitseva suojakytkin, käännä suojakytkin KATKAISTU-
asentoon ja teippaa suojakytkimen varsi niin, eä se pysyy KATKAISTU-asennossa.
Averssement Avant de praquer l'une quelconque des procédures ci-dessous, vérier
que le circuit en courant connu n'est plus sous tension. Pour en être sûr, localiser le
disjoncteur situé sur le panneau de service du circuit en courant connu, placer le
361
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