Xantrex Technology Inverter Communications Adapter - Manual (Page 26)

Installation
10 975-0052-01-01 Rev A
Positive Ground or PV Ground Fault Protection
Installations
When using the ICA in inverter installations that have DC
ground fault protection (PVGFP-CF) or where the inverter is
connected in a “positive ground” configuration, an opto-
isolator must be connected somewhere between the ICA and
the computer com port. Opto-isolators can be obtained
through www.blackbox.com (part SP400A-R3 and PS576 -
9 Vdc power supply).
CAUTION: Equipment Damage
Damage to the inverter and ICA can occur if an opto-isolator is not
used in a “positive ground” configuration or in installations that
have DC ground fault protection.