Pulse Secure MAG2600, Hardware Manual

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MAG Series Pulse Secure Gateways Hardware Guide
© 2016 Pulse Secure, LLC., All rights reserved. 81
• A DC-powered Pulse Secure Gateway is equipped with a DC terminal block that is rated for the power
requirements of a maximally configured Pulse Secure Gateway. To supply sufficient power, terminate the
DC input wiring on a facility DC source capable of supplying at least 65 A @ –48 VDC for the system, or
at least 48 A @ –48 VDC for each power supply. We recommend that the 48 VDC facility DC source be
equipped with a circuit breaker rated at 60 A (–48 VDC) minimum, or as required by local code. Incorporate
an easily accessible disconnect device into the facility wiring. In the United States and Canada, the –48
VDC facility should be equipped with a circuit breaker rated a minimum of 125% of the power provisioned
for the input in accordance with the National Electrical Code in the USA and the Canadian Electrical Code
in Canada. Be sure to connect the ground wire or conduit to a solid (earth) ground. A closed loop ring is
recommended for terminating the ground conductor at the ground stud.
• Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriate gauge wire to handle
up to 60 A.
• A DC-powered Pulse Secure Gateway that is equipped with a DC terminal block is intended only for
installation in a restricted access location. In the United States, a restricted access area is one in accordance
with Articles 110-16, 110-17, and 110-18 of the National Electrical Code ANSI/NFPA 70.
NOTE: Primary overcurrent protection is provided by the building circuit breaker. This breaker should
protect against excess currents, short circuits, and earth faults in accordance with NEC ANSI/NFPA70.
• 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 Pulse Secure
Gateway and the supply side of the DC wiring.
• The marked input voltage of –48 VDC for a DC-powered Pulse Secure Gateway 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 Pulse Secure Gateway is a positive ground system, you must connect the positive lead to the
terminal labeled RETURN, the negative lead to the terminal labeled
• –48V, and the earth ground to the chassis grounding points.
DC Power Disconnection Warning
WARNING: Before performing any operations, 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 switch handle of the circuit breaker in the OFF position.
DC Power Grounding Requirements and Warning
An insulated grounding conductor that is identical in size to the grounded and ungrounded branch circuit
supply conductors, but is identifiable by a green and yellow stripe wire, is installed as part of the branch circuit
that supplies the unit. The grounding conductor is a separately derived system at the supply transformer or
motor generator set.
WARNING: When installing the Pulse Secure Gateway, the ground connection must always be made first and
disconnected last.