Appendix B: Connecting Emergency Stop
Button or Fire Alarm Control
Overview
An external emergency stop button (not supplied by SolarEdge) should be connected
to the firefighter gateway, in order to shut down the PV system in case of emergency.
Pressing the emergency stop button starts the shutdown sequence of the PV system.
Preferably, use a button with a locking feature that stays mechanically locked in the off
position until you turn it clockwise a quarter turn to unlock and release it. The
firefighter gateway can also be connected to a fire alarm control unit that has a relay
output. The relay output of the fire alarm control has the same functionality as the
button. You can connect both a stop button and a relay together to the same firefighter
gateway, or two stop buttons or two relays.
Figure 20: Example: Emergency stop button and fire alarm system connection
The emergency stop button(s) or relay(s) connect to the L1 or L2 ports on the Control
connector of the gateway, between 5V and L1 / L2/both. In the following sections, the
instructions refer to L1, however applies to L2 as well.
Firefighter Gateway Installation Guide MAN-01-00113-1.4
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Appendix B: Connecting Emergency Stop Button or Fire Alarm Control