Connecting a pwr01 dc power supply – Allied Telesis Removable Power Supply and Fan User Manual
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Removable Power Supply and Fan
12
Connecting a PWR01 DC power supply
Follow these instructions to connect an AT-PWR01 DC PSU to a DC power
supply. Only trained and qualified personnel should connect a DC power supply.
You need an appropriate DC power source, DC supply cable, ring connectors, a
crimp tool and an appropriate screwdriver to tighten the terminal screws.
For centralised DC power connection, the switch should be installed in
restricted access areas only (such as dedicated equipment rooms or
equipment closets) in accordance with Articles 110-16, 110-17, and 110-18 of
the National Electrical Code, ANSI/NFPA 70.
Power supply specifications:
■
functional range 40 to 60 V, 48 V nominal
■
supports either positive grounded or negative grounded operation
■
a 15 Amp certified/listed circuit breaker is required for circuit protection
Supply cable specifications:
■
tray cable should be UL listed Type TC tray cable (or equivalent)
■
three-core cable is required
■
minimum core size: 3.3 mm
2
(12 AWG) high strand count copper wire
■
minimum cable rating: 600 V, 90 degrees C
Warning Disconnect the power supply cable before starting this procedure.
1.
Remove the transparent protective terminal cover.
2.
Strip the supply cable wires to expose 7.5mm (0.31 in.) of bare conductor.
Terminate the wire with a nylon insulated solderless ring tongue terminal,
JST FN5.5-5 or equivalent, using a crimp tool.
3.
Connect the ground wire to the ground terminal. Use the diagram on the
rear panel of the switch to identify terminals. Tighten the terminal to
between 2.4 and 4.0 Nm (21.3 and 35.4 lbf in).
Warning When x900-24 units are connected with VCS stacking cables (XEM-
STK-CBL) ensure that all the PSUs are appropriately grounded. This is to avoid
large circulating ground currents that could damage the stacking cables. To
achieve this ensure that:
•
AT-PWR01 DC is grounded at the GND terminal. In order to avoid
large circulating ground currents, the wires of each grounding cable
must be 18 AWG (0.8mm
2
) or thicker.