Juniper CBL-M40-PWR-AU Benutzerhandbuch
Safety Guidelines and Warnings
M40 Internet Router Hardware Guide
62
You must connect only to a DC power source for which the output complies with the
safety extra low-voltage (SELV) requirements of UL 1950, CSA C22.2 No. 950-95, EN
60950, and IEC 60950 to a DC-input terminal block.
60950, and IEC 60950 to a DC-input terminal block.
A DC-powered router 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.
one in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical
Code 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.
equipment.
For personal safety, connect the green and yellow wire to safety (earth) ground at both
the router and the supply side of the DC wiring.
The marked input voltage of –48 VDC for DC-powered routers 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.
with float voltages for the charging function.
Because the router is a positive ground system, you must connect the positive lead to the
terminal labeled
RTN(+)
, the negative lead to the terminal labeled
–48V
, and the earth
ground to the grounding studs on each power supply. Use a hexagonal-head external
drive socket wrench, with a minimum of 150 lb-in. (16 Nm) tightening torque, to
connect the leads to the terminals.
drive socket wrench, with a minimum of 150 lb-in. (16 Nm) tightening torque, to
connect the leads to the terminals.
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.
circuit breaker. This breaker should protect against excess
currents, short circuits, and earth faults in accordance with
NEC ANSI/NFPA70.
If using a fixed-size nut driver or wrench to tighten and
loosen the nuts, use only a 7/16-in. tool. Do not substitute
a metric tool, because a tool that does not fit the nuts
exactly can damage them. If a 7/16-in. tool is not available,
use pliers or an adjustable wrench.
loosen the nuts, use only a 7/16-in. tool. Do not substitute
a metric tool, because a tool that does not fit the nuts
exactly can damage them. If a 7/16-in. tool is not available,
use pliers or an adjustable wrench.