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First Steps with SAMLight & USC > Initial Setup and Commissioning > USC Wiring > USC-3 > Power Supply

Power Supply 		Previous pageReturn to chapter overviewNext page

There is only one method to supply your USC-3 card with power.

 

Externally via the 37-Pin Laser, I/O connector.

 

The USC card needs up to three power supplies which are provided via the 37-pin connector of the USC card:

1.USC Main Power

2.USC Opto-coupled outputs and inputs (OPTO_OUT and OPTO_IN)

3.Optionally: Opto-coupled Laserports

 

Power Supply

USC 37-pin connector

Input [Volts]

Default State

USC Main

EXT_VCC

pin 24

+ 5

Not powered.

GND

pins 14, 15, 25

USC OPTO_OUT

OPTO_VCC

pin 5

+ 5 .. + 24[a]

Not powered.

OPTO_GND

pin 6

USC Laser-Ports

EXT_LASER_VCC

pin 11

+ 5

Powered via USC main.

EXT_LASER_GND

pin 30

Table 8: USC Power Connection

[a]: Usually the laser requires 5V signals. If needed the Opto_VCC can be supported with up to 24V.

When you power up the USC-3 card, the green LED will flash constantly and then stay steady. The blue LED is on as well.

After finishing the power supply you can continue with the wiring of the laser connection.