LEGRAND 48DCWC-04-2X100-D0NB, User Manual

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Sentry Switched DC PDU
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Chapter 1: Introducing the PRO1 Sentry Switched DC PDU
Server Technology ’s PRO1 Sentry Switched DC PDU provides
industry-standard control of cabinet equipment at remote
locations, including colocation facilities and network
operations centers.
The PRO1 Sentry Switched DC PDU gives the ability to reboot
locked-up remote servers around the clock. Features include
individual outlet current outputs, measurements, and
automated alerts for a number of low and high current needs
for the specific environmental conditions.
Fused or Breaker Power Output Protection is a feature of the
PDU, meaning each low and high current output is individually protected by its own over-current protection
device, available in a variety of current capacities. Low current GMT fuses have a visual indicator that show
when the fuses are blown.
Because the fuses are rated as disconnect switches, they can be hot-swapped without removing power to
input-feeds. In addition, optional temperature and humidity probes with 10-ft. cords allow for multiple
sensors in different locations for complete environmental monitoring
DC Products vs. AC Products
The following items list how Server Technology ’s DC PDUs differ from the AC PDUs:
•
DC firmware is specific to the -48V DC product line.
•
All units are Switched and have a minimum of two inputs.
•
Input and output connections are terminal type, not common inlets/outlets.
•
Each output terminal is individually protected by a fuse or circuit breaker rated for hot disconnect.
•
Relays are normally-closed instead of normally open; there is no power-up sequencing.
•
True input and output “ On-Sense ”.
•
Measures only current (amps) at each output (no input/aggregate measurements, no voltage
measurement).
•
Direct current (DC) is simpler than alternating cur rent (AC); only need to know Watt’s Law:
Watts = Volts x Amps
Volts = Watts / Amps
Amps = Watts / Volts