RSD switch Additional Info

Installer Memo - North America
2 © 2022 Enphase Energy Inc. All rights reserved. May 13, 2022
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: