Contemporary Control Systems AI Active Hubs - Manual (Page 13)

TD675100-0M
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9
2.4.1 DC Powered
Make connections as shown in the diagram.
The AI Series
incorporates a DC-DC converter that accepts a wide voltage
range (10
–36 Vdc) and converts the voltage for internal use.
Input current varies with input voltage so it is important to size
the power conductors accordingly.
Input power to the AI does
not exceed 4 watts; therefore, at 10 Vdc, the input current is
approximately 400 m
A. The ground connection to the AI is
connected to chassis within the AI.
The input connections are
reverse
-voltage protected.
Figure 2-1. DC Powered
2.4.2 Redundant DC Powered
Redundant diode isolated DC power inputs are provided on the
AI for those applications where there is a concern that the AI
remain operational in the event of a primary power failure.
Make connections as shown in the diagram.
Each power supply
source must be sized for the full 4 watt load of the AI.
Do not
assume that input currents will be balanced from the two
supplies.
Figure 2-2. Redundant DC Powered