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DB-37 Manual > Connectors And Indicators > LASER > Power Supply

Power Supply
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When using laser signals in opto-insulated mode you have to use the external power supply for the laser indicators, too. The default position of the jumpers is internal.

For DB-37 V1.3:

JP3 changes VCC, JP4 changes GND!

jp_vert_12        

Figure 13: Internal VCC, GND

jp_vert_23

Figure 14: External VCC, GND

Depending on the used laser mode, the position of the solder jumper SJ10 has to be selected as shown in the figures 15 and 16.

db-37_laser_high

Figure 15: Laser mode active high

db-37_laser_low

Figure 16: Laser mode active low
 

For DB-37 V2.1:

LASER 3p jumper

Position 1/2

Position 2/3

VCC - supply voltage

Internal VCC

External VCC

GND - supply gnd

Internal GND

External GND

L/H - active low/high

Active high

Active low

Table 10: Pin selection LASER DB-37 V2.1