Procedure for DC power supply
Only trained and qualified personnel should connect a DC power supply.
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
Warning Ensure that the power supply cable is not live before starting.
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
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).
Caution Check that the PSU terminals are wired to the correct polarity. A PSU will be damaged if incorrectly connected.
4.Connect the positive feed to the + (positive) terminal and the negative feed to the - (negative) terminal. Tighten the terminals to between 2.4 and 4.0 Nm (21.3 and 35.4 lbf in).
5.Ensure there are no exposed cable strands.
6.Replace the cover. You must replace the transparent plastic terminal cover before continuing.
7.Secure the supply cable to the rack framework or a similar object to ensure that connections are isolated from any force applied to the cable.
8.Ensure the circuit breaker for the supply circuit and the Run/Standby control on the PSU are off. Use a small diameter pin to press and release the Run/Standby control so that it is not pushed in (which is the Off position).
9.Connect the supply cable wires to the circuit breaker.
10.Turn on the PSU by pushing in the Run/Standby control with a small diameter pin.
11.Confirm that the switch is receiving power.
Check that at least one of the PSU LEDs on the front panel of the switch is lit green. If no LEDs light, refer to the Hardware Reference for troubleshooting information.
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