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Intelligent MDU
Dual input version
The dual input version enables main and back up power sources to be connected to a single
Cardinal unit. Switching to the back up input supply is automatic on power fail of the main
source. The changeover system allows non phase inputs to be switched up to 650V.
Automatic power shedding
If a back up power supply is selected, it may be necessary to switch off non-critical
equipment by shedding a number of iMDU outputs. Power shedding is configured for
automatic operation in the iMDU configuration page.
Sequential power on/off
All outlets are individually switched enabling sequential switching to prevent an excessive
current surge on start-up and an orderly power-down when shedding outputs. This does not
apply to fail safe models, where outputs are ON at power up.
Network interface
The dB Cardinal intelligent mains distribution unit provides fully featured web and SNMP
interfaces giving easy access to sophisticated remote control and configuration facilities.
Email/SNMP alerts
The Cardinal range can be configured to provide email and SNMP alerts for various
conditions including; loss of input mains power, blown fuses, output status changing (i.e.
relay on or off).
Power-off fault alerts
On loss of mains input capacitors sustain the microcontroller sufficiently (around 10 seconds)
to record the fault and send SNMP traps and/or emails to alert the management system of
the loss.
Logging
As well as error logging the iMDU records five days of the following:
•
Peak input voltage per input
•
Minimum input voltage per input
Fail safe
Fail safe ensures that all outputs are ON at power up. If the control system were to fail, all
outputs remain ON and can no longer be controlled.
Temperature and Humidity sensing
An optional remote temperature and humidity sensor can be added for environmental
monitoring at any position within the equipment bay.
2014 dB Broadcast Ltd
Cardinal
Introduction
2
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