Installation and Operator’s Manual | Page 47 of 63 |
(PVI-3600-OUTD-UK-F-W Rev.: 1.0) | |
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6 DATA CHECK AND COMMUNICATION
6.1RS-485 serial link
The RS-485 link uses two wires for signals plus a third wire for signal grounding, which is different from the equipment grounding of the unit. The wires must be run in a watertight conduit through the bottom of the unit as explained in paragraph 3.5 after removing the watertight cap and installing a suitable watertight conduit connector. The wires are then run to the RS-485 screw terminal blocks and connected as shown in Fig.18:
Signal wires must be connected to +T/R and –T/R terminals Grounding wire must be connected to the RTN terminal
Fig.17: The RS-485 serial link terminal blocks
WARNING: RS-485 cable must be UL/CSA certified wiring and must be additionally protected by means of a non-metallic tubing.
The single AURORA has a default address is two (2) and the S1 dip switch is in the OFF position (pushed away from the side access panel). The RS-485 address does not have to be configured for the single AURORA inverter.
Up to 31 AURORA inverters can be connected on a the same RS-485 line. The maximum recommend RS-485 cable length is 1300 yards (1200 m).
In case multiple inverters are daisy-chained to the same RS-485 line, then the last unit must be identified by changing the position of the dip-switch shown in Fig.18
