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Installation and Safety Guide
13
4. Connect the cable to the circuit breaker.
Connect the supply cable wires to the circuit breaker, in accordance with
the applicable wiring regulations in your region, and in conjunction with any
safety guide information for the DC supply unit. Ensure there are no
exposed cable strands. The correct wire colour for each polarity is:
• blue: negative
• black: earth
• red: positive
Caution Check that the supply cable wires are wired to the correct
polarity. You will damage the PSU if you incorrectly connect it.
5. Power the router.
Turn the circuit breaker for the supply circuit to the ON position, then
power the router by pushing the run/standby button on the PSU.
Checking the PSU’s status
The front panel of the router has LEDs that indicate the operational status of
any connected power supply. After you have inserted the PSU and powered on
the switch, you can check the PSU is operating correctly by using the LED table
in the section
“LEDs on the AR750S-DP” on page 22.