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About GPIO Connections
I NPUT
VDC
External Series Resistor
5
6
12
24
48
The maximum voltage allowed for an external power supply for logic control is 48 volts DC. The
use of a current limiting resistor is required for some voltages.
be
0
0
680 @ 1/4 watt
1.8k @ 1/2 watt
3.9k @ 1 watt
If the equipment being controlled is electrically isolated, than the use
of the GPIO port's power supply is acceptable as shown here.
Take note to use current limiting resistors per the above chart if
the voltage supplied is above 6vdc. The intention is to limit the
current to 20mA for each GPI pin.
The GPO portion of the GPIO ports are solid state relays. Current
should
limited to a combined 100mA through all the pins of a port.
Maximum allowed voltage is 24 volts. The following diagram
shows the recommended connections for outputs with the use of
an external power supply.
© 2016 Axia Audio - Rev 2.0
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