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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.
JP3 changes VCC, JP4 changes GND!
Figure 13: Internal VCC, GND
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.
Figure 15: Laser mode active high
Figure 16: Laser mode active low
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