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· 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.
116
BP13370_NT_10000_englisch 23.11.2005 17:40 Uhr Seite 32