Operation and installation manual
Page 50 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
When an external (24VDC) power supply is used, set S3 switch, in Figure 9-15, to
ON-EXT position.
Figure 9-15: Ex24VDC supply switch
If no external power supply is used, make sure the S3 switch is set to
ON-INT position.