RSD switch Additional Info

Installer Memo - North America

7. How to energize IQ System Controller 2 and exit Rapid Shutdown?

The Rapid Shutdown (RSD) switch must be wired BEFORE ENERGIZING the IQ System

Controller 2. Upon completing the wiring of the switch using the correct wiring instructions, the

RSD switch must be kept in OFF position as shown below, before the IQ System Controller 2

is Energized.

The correct way to energize the IQ System Controller 2 and the system is available in

Annexure 2: Instructions to Energize IQ System Controller 2 in this document.

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

After installing the Rapid Shutdown switch and energizing the IQ System Controller 2 follow

the below procedure to verify the functionality of the Rapid Shutdown switch.

1. Ensure the Rapid Shutdown Switch is turned ON.

a) Check the voltage across the two screws of the NC3 terminal (as shown above).

• If the voltage across the pins is ~3.3 Vdc then the switch is NOT wired correctly.

Fix the wiring per instructions here.

• If the voltage across the pins is ~0 Vdc then the switch is wired correctly.

b) Check the voltage across the two screws of the NC4 terminal (refer to Figure 3).

• If the voltage across the pins is ~3.3 Vdc then the switch is NOT wired correctly.

Fix the wiring per instructions here.

• If the voltage across the pins is ~0 Vdc then the switch is wired correctly.

2. Ensure the Rapid Shutdown Switch is turned OFF.

a) Check the voltage across the two screws of the NC3 terminal (refer to Figure 3).

• If the voltage across the pins is ~0 Vdc then the switch is NOT wired correctly.

Fix the wiring per instructions here.

• If the voltage across the pins is ~3.3 Vdc then the switch is wired correctly.

b) Check the voltage across the two screws of the NC4 terminal (refer to Figure 3).