RED00202(R2) MANUAL
Manual and Technical Function
Technical Description
If breakdowns cost a lot of money and a service call is expensive, it is advisable to operate the power supply
redundantly. The redundancy module RED00202 is designed for applications from 0Vdc to 125Vdc. The DC
outputs of two identical DC voltage sources are decoupled. The total load is equal to the individual load of each
connected DC source.
In normal operation, the total load is distributed evenly among the connected power supplies. If one of the
connected DC power sources fails, the other source takes over the entire load without causing a power failure in
the system. The internal Power-ok relay (changeover contact) provides continuous control of the status of the
connected power supplies. If one power supply fails, the relay indicates that the remaining power supply will take
over. The low voltage detection Vu can be adjusted via the ADJ control potentiometer on the front panel. The
over voltage detection Vo from the technical data table is set by the factory and cannot be changed.
The DC input and the DC output are potential-free. The GND input of the RED00202 is only necessary for self-
supply. The voltage drop between DC input and DC output is between 500mV and 700mV (see table Technical
Data).
Current voltage graph
Voltage control specification:
The change-over contact of the control relay is at the left
position when the input voltage V1in and V2in operate
between Vu and Vo. The LED of each input lights green.
The relay contact changes to the right position when the
input voltages are either smaller Vu or larger Vo.
The upper voltage margin Vo is fixed by the factory. The low
voltage detection Vu can be set with the front sided
potentiometer (ADJ). The input to DC output power ratio is
2x 1kWinput = 1x 1kWoutput, 1x 1kWinput = 1x 1kWoutput
The model RED00202A can be used below 12Vdc. Note
that the DC-ok relay and the ADJ potentiometer will not
function below when a voltage below 12Vdc is applied to
the inputs V1in & V2in.
Temperature Derating
The maximum ambient temperature during operation is + 70°C.
The measuring point is 50mm outside the device.
Coating Option
We offer the RED-series with optional coating. It is to be used in e.g., dusty, dirty, high humidity, or in awaiting
quick temperature changes. Short circuit and corrosion at print board lines and at solder points can be
prevented. The coat itself is a transparent acrylic resin. Peters SL 1306 N-FLZ (transparent) IEC60216-1 2001,
IPC-CC-830B, UL listed as permanent coating File No.: E80315 , UL94V-0
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