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Core and All Optional I/O boxes
Power
The Type R Core and all Type R I/O units have two IEC AC power inlets and are fitted with dual
power supplies. Units will be fully functional on one PSU, however both should be fed where
possible from separate sources to provide redundancy against both PSU failure and external
power loss.
The operating AC supply voltage is 100 V - 240 V +/-10%.
The peak inrush current is limited (cold start). Figures are available for all units. This reduces
the chance of a nuisance trip or fuse blow from power up. The RMS quiescent current figures
are specified on the rating label for all types of I/O box and are shown in this manual for each
I/O box type.
Power Factor
All Type R I/O units require less than 75W of input power. The internal power supplies fitted
have passive filtering (as opposed to active power factor correction) to reduce the harmonics
to within the limits of the standard EN61000-3-2. At the time of writing the standard does not
apply to equipment <75W. If the lower limit is ever reduced the units will be compliant and as
such are future proof.
Heat Output and Efficiency
The heat output from Type R I/O units depends on the supply voltage and loading. Typically it
is 0.55 times the RMS VA (Volts x Amperes) at 230V and 0.7 times the RMS VA at 115V. Heat
output figures are available for all I/O boxes.
The low power PSU efficiency is again dependant on supply voltage and loading, generally
>70% .
Cooling
The Type R Core Unit is 2U and is cooled under control with fan assistance. Operation is not
dependant on the fan; it is there to extend the operating life of the unit. There is an 80mm low
power, low speed and low noise fan mounted to the right hand side panel of the unit venting air.
Fan speed is monitored and system status warnings are generated if fans fail. Air is drawn in
through the left hand side panel.
The Type R Optional I/O boxes are 1U and do not require fan assistance having sufficient
surface area to radiate heat adequately.
The side panels of all Type R I/O units should be unobstructed with at least 50mm (2’)
clearance to allow airflow. No clearance is required above or below the unit.
I/O units may be mounted in an open bay providing the ambient air temperature is within limits
(see below). The units may also be housed in any air conditioned bay.
Acoustic Noise Core
<27 dB SPL (A-weighted, 1m from front).
Operating Ambient Air
Temperature
0°C - 40°C
Relative Humidity
5% - 80% Non-Condensing
ALL TYPE R BOXES
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