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USC-3 Manual > Electrical Characteristics > Power Supply

Power Supply
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The USC card needs up to three power supplies which are provided via the Laser, I/O - 37 pin connector. The power supply of the USC-3 has the following electrical characteristics:

Power Supply

Voltage [V]

Maximum Current

Default state

Ext_VCC: Main power [a]

5.0 [b]

1.6 A

Not powered

Opto_VCC: Opto-coupled outputs (Opto_Out)

5.0 to 24.0

210 mA [c]

Not powered

Laser_VCC: Opto-coupled laser signals (Laser_Gate, Laser_A, Laser_B)

5.0

100 mA [c]

Internally powered

Table 1: Power supply

[a]: The blue LED for power indication is on between 4.2 V and 6.2 V.

[b]: Information on where to measure the currently applied power at the card are given here.

[c]: The output or sink currents are listed in chapter Electrical Characteristics.