· RS485 Wiring
Solar Inverters NT 10000 can be cross-lin- ked via RS485. When doing so, please keep in mind that the Solar Inverters must be connected in series. Cross-linking them point-to-point is not admissible. Interface RS485 is connected via the printed circuit board terminals and the corresponding M12 cable glands inside the housing. Prior to wiring the RS485, move the cover of the Solar Inverter up, and fix it in position by tightening a lateral screw. See chapter 2.1 «Safety Instructions».
The required cable terminal block («X6») with the connections «RS485 +», «RS485 -», and «RS485 GND» is in the lower section of the circuit board (see illustr. page 115). Caution: There are two each of all termi- nals, so the ingoing and outgoing lines can be connected separately.
Use a twisted two-wire cable for the RS485 wiring of the Solar Inverter. Connect the terminals «RS485 +» between the Solar Inverters with one core and the terminals «RS485 -» with the other.
If you use a shielded twisted two-wire cable, you can earth the shield. That will improve the communication reliability.
With the last Solar Inverter, the jumper «RS485 MATCH» must be closed. With all other Solar Inverters, it has to be in the open position (see chapter 3.6 «Com- munication Link»).
·Connecting a cable to the spring-loaded terminal
·Use a small screwdriver. Press the orange terminal. The terminal will open.
·Insert the (at least 11 mm bare) cable into the respective terminal hole.
·Release the pressure from the screw- driver. The cable is now attached to the connection.
·Make sure the cable is connected tightly.
