Juniper JSA5800, Hardware Manual

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NOTE: Primary overcurrent protection 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 conditions, connections with
reversed polarity might trip the primary circuit breaker or damage the equipment.
• For personal safety, connect the green and yellow wire to safety (earth) ground at both the device
and the supply side of the DC wiring.
• The marked input voltage of –38 VDC for a DC-powered device is the nominal voltage associated
with the battery circuit, and any higher voltages are only to be associated with float voltages for the
charging function.
• Because the device is a positive ground system, you must connect the positive lead to the terminal
labeled RTN, the negative lead to the terminal labeled –38 VDC, and the earth ground to the device
grounding points.
RELATED DOCUMENTATION
General Electrical Safety Guidelines and Warnings | 0
Prevention of Electrostatic Discharge Damage | 0
AC Power Electrical Safety Guidelines | 0
DC Power Disconnection Warning | 81
DC Power Grounding Requirements and Warning | 83
DC Power Disconnection 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 off, locate the circuit breaker
on the panel board that services the DC circuit, switch the circuit breaker to the OFF
position, and tape the device handle of the circuit breaker in the OFF position.
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
81