Powering a Device On and Off 29
Each screw contains a washer used to secure a DC source power-cable lug
to the terminal block.
Figure 20: Connecting DC Power-Cable Lugs
d. Secure the positive (+) DC source power cable lug to the RTN terminal.
e. Secure the negative (–) DC source power cable lug to the –48 VDC
terminal.
f. Dress the power cables appropriately.
4. Verify that the power cord does not block access to device components or
drape where people can trip on them.
Powering a Device On and Off
To power on a device, press the power button. ScreenOS starts as the power supply
completes its startup sequence. The POWER
LED illuminates during startup and
remains on steadily when the device is operating normally.
To power off a device, press the power button and hold it for more than 5 seconds.
-48V
RTN
Grounding lugs
Washer
DC terminal block
Lug
Screw with
captive
washer
CAUTION: Ensure that the DC cables do not touch the two screws on the chassis
that are adjacent to the terminal block. Contact between the DC cables and the
chassis screws will cause a circuit failure.
NOTE: The PSU in the rear panel of the device could include a power switch. If such a
switch is included, make sure the switch is in the ON position.
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