NOTE: Primary overcurrent protecon 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 condions, connecons 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 baery circuit, and any higher voltages are only to be associated with oat voltages for the
charging funcon.
• Because the device is a posive ground system, you must connect the posive lead to the terminal
labeled RTN, the negave lead to the terminal labeled –48 VDC, and the earth ground to the device
grounding points.
DC Power Disconnecon 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
posion, and tape the device handle of the circuit breaker in the OFF posion.
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 posie en plakt de schakelaarhendel van de stroomverbreker met plakband in de
UIT posie vast.
Varoitus Varmista, eä tasavirtapiirissä ei ole virtaa ennen seuraavien toimenpiteiden
suoriamista. Varmistaaksesi, eä virta on KATKAISTU täysin, paikanna tasavirrasta
huolehvassa kojetaulussa sijaitseva suojakytkin, käännä suojakytkin KATKAISTU-
asentoon ja teippaa suojakytkimen varsi niin, eä se pysyy KATKAISTU-asennossa.
Averssement Avant de praquer l'une quelconque des procédures ci-dessous, vérier
que le circuit en courant connu n'est plus sous tension. Pour en être sûr, localiser le
disjoncteur situé sur le panneau de service du circuit en courant connu, placer le
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