Allied Telesis IE048-480, Installation Manual

Page: 54 / 72

Chapter 3: Installing the Power Supply
54
Adjusting the Voltage on the DC Output Connectors
This procedure explains how to verify and adjust the output voltage on the
DC output connectors with the TRM screw on the front panel. The range is
45.0V to 55.2V. The default is 48V. Perform this procedure before
connecting powered devices to the power supply to verify that the power
supply is supplying the correct voltage.
The following procedure assumes you have already connected the power
supply to an AC power source. For instructions, refer to “Connecting the
AC Power Wires” on page 52.
To verify and adjust the output voltage on the DC output connectors,
perform the following procedure:
1. Turn on the AC circuit breaker to power on the power supply.
2. Connect a volt meter to one positive and one negative DC Output
connector on the front panel.
3. Test and adjust the output voltage. To increase the voltage, turn the
TRM screw clockwise. To decrease it, turn the screw
counterclockwise.
4. Remove the volt meter.
5. Go to “Wiring the DC Output Connectors to Powered Devices” on
page 55.