RSD switch Additional Info

Installer Memo - North America

4. How to verify the Rapid Shutdown (RSD) switch installation and functionality?

Page 5 of this document provides the procedure to verify RSD switch installation and

functionality.

5. When to use the RSD switch with IQ System Controller 2?

The RSD switch is required and must only be used for IQ8 microinverters. For systems with

grid tied PV i.e., IQ6/7 or M215/250 microinverters, installers must not use the Rapid shutdown

switch. Rapid Shutdown operation for these microinverters can be initiated in one of three

ways

a. The AC circuit breaker installed within the IQ Combiner

b. Or the AC circuit breaker installed within IQ System Controller

c. Or a dedicated AC disconnect switch in series with the combined PV inverter circuit

Installer must follow all national and local codes while installing PV systems and Rapid

Shutdown initiators.

It is recommended that installers remove the terminal block from System Controller before

wiring the jumpers/ cable headers.

For systems with grid tied PV i.e., IQ6/7 or M215/250 microinverters, installers must wire a

jumper across the NC3 and NC4 terminals. If using 28AWG to 16AWG wire, installers can

simply jumper the RSD terminals as shown in the figure below:

The RSD and other auxiliary contact terminals in the IQ System Controller 2 are rated for up

to 16AWG wire. To avoid damaging the RSD terminals, installers MUST use the cable header

assembly to connect wires thicker than 16AWG to the terminals, as shown in the figure below: