ABB PVI-3.0-TL-OUTD-S-US Product Manual page 28

Communication and signal wiring connections
Wiring for the RS-485 communication system and hardwired control options must be routed through the
switchbox and into the main inverter chassis for termination. It is necessary to open the inverter cover to access
the communication and signal wiring which is located on the inverter board.
• To remove the front cover of the inverter, loosen the four captive screws using the Torx screwdriver provided.
• When connection operations are complete, re-install the front covers and tighten the cover screws with at
least 1.5Nm (13.2 in-lbs) torque to ensure proper waterproof sealing.
• Remove the threaded plastic plugs from the service cable openings and replace with the appropriate
conduit connector.
• Whether these cables need to be protected by conduit depends on the applicable wiring code.
• If no conduit is used, the cables should be brought into the wiring box via a 1/2" box connector with rubber
cable glands to maintain NEMA 4X rating.
• If conduit is used, run the appropriate raceway and terminate it to the wiring box chassis using a conduit
connector that matches the raceway.
• The conduit must be terminated at one of the two ½" openings show in table 3-1.
• Route the cables through the switchbox and into the inverter keeping close to right wall of the switchbox
chassis.
• For versions with a front-facing switch, route the cables through the plastic guides located on the side of
the wiring box.
• For versions with a bottom switch, use the plastic clamp to secure to the wall.
• Refer to table 3-3 below to locate the terminals for the alarm and monitoring connections within the inverter.
• The cables are connected to the terminals using the mating connectors supplied in the hardware bag
shipped with the inverter.
Table 3 3: communication and signal wiring components
Label Details
P Input modes switch S1
Q External Alarm Out Terminals
R RS485 bus
terminal
S RS485 bus connection via RJ45
connector
T Termination resistance switch
CAUTION HAZARDOUS VOLTAGE – The ±WT (WIND) terminals are not isolated and can have
hazardous voltages present. These terminals must not be utilized for any purpose in a PV installation
(for use with wind models only).
connection via
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P
Q
3 - Mounting and wiring
T
S
R