Initial Setup and Commissioning > USC Wiring > USC-3

There are different ways to connect a laser source to the USC-3 card.

Each laser has its own needs regarding software configuration and hardware signals. Therefore always ask our support team for a recommendation for how to wire your laser.

Some connection manuals are available online.

In the case of open questions send us a request via info@scaps.com with your laser source manual attached.

The following is an overview of the common signals that are used to control a laser source. All of these signals are located on the DB37 Laser I/O, 37 Pin Connector.

Note that not all of this signals are required for each laser.

Signal	Pin	Comment
Opto_Out_0	3	Mark in Progress (MIP). 5-24V TTL. Active Low per default. Can be inverted by software flag. [a]
Opto_Out_2	4	Red Pointer. 5-24V TTL. Active Low per default. Can be inverted by software flag. [a]
Laser_Gate	31	Active Low per default. Can be inverted by software flag. 5V TTL. [a]
Laser_A	13	Active Low per default. Can be inverted by software flag. 5V TTL. [a]
Laser_B	12	Active Low per default. Can be inverted by software flag. 5V TTL. [a]
8 Bit LP	16-19 34-37	Power Control via 8 Bit LP. TTL at 5V.
DAC_A	10	Power Control via 0-10V analog voltage. [b]
DAC_B	29	Power Control via 0-10V analog voltage. [b]
Do not connect the following signals, since they are predefined: •Opto_In_0: External start signal •Opto_In_1: External stop signal

Table 9: Laser Connection Signals

[a]: Every signal can be inverted by a software flag at sc_setup.exe → Hardware Settings → Settings → Driver Settings.

[b]: The voltage limit (2.5V / 5V / 10V) can be set in the group box Laserports at sc_setup.exe → Hardware Settings → Settings → Driver Settings.

If you are done with this step you can continue to connect the scan head.