Powering Requirements - ADC Digivance Installation And Operation Manual

2.3

Powering Requirements

2.3.1 DHU and DEU Powering
The DHU and DEU are powered by 120–240 Vac (50–60 Hz) which is supplied through a
standard three-conductor AC power cord. The 120 Vac power cord is provided with the unit
and is 98 inches (2.5 m) long. Both the DHU and the DEU have a current rating of 2.0 Amps
at 120 Vac input. Locate each unit so that an AC outlet is within the reach of the power cord.
If back-up powering is required, it is recommended that the building Uninterruptible Power
Supply (UPS) system be used to provide back-up power to the DHU and DEU in the event of
an AC power outage.
2.3.2 DRU Powering
The DRU is powered by 48 Vdc power which is supplied to the DRU through the front panel
RJ-45 connector. Power to the DRU may be provided by the DHU, DEU, or by a 120 Vac to
48 Vdc power converter (available separately as an accessory item) plugged into a properly
grounded 120 Vac outlet. The DRU has a current rating of 350 mA at 48 Vdc input.
If the DRU will be powered by the DHU or DEU, the power cable must be fabricated on-site by the
installer. Use category 3 or 5 twisted pair cable as the power supply cable when the DRU is
powered by the DHU or DEU. The maximum recommended length of the power cable is 500
meters. If the DRU will be located more than 500 meters from the DHU or DRU, the DRU must be
locally powered by a 48 Vdc power converter. Route the power cable between the power source and
the DRU. Terminate both ends of the power cable with a male RJ-45 connector.
The DRU may be powered locally by the ac/dc converter, shown in Figure 10, which is
available as an accessory item. The converter is a UL Listed stand alone Limited Power
Supply (LPS) unit with a rated output of 48 Vdc at 1.2 Amps. The converter is equipped with
a 6-foot (1.8 m) DC power cable which is terminated with an RJ-45 male connector. The
converter is powered by 120–240 Vac (50–60 Hz) power which is supplied though a standard
three-conductor AC power cord. The 120 Vac power cord is 6 feet (1.8 m) long and is
provided with the converter.
Figure 10. AC/DC Power Converter
ADCP-75-110 • Issue 2B • July 2001
15988-A
© 2001, ADC Telecommunications, Inc.
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