The relay contacts (SPDT) are intended to be used to shut the engine off. Connect these contacts to your motor controller or ignition controller. Directly switching the ignition coil primary winding is not permitted because it generates strong EMI emissions which may lead to On-Board Computer malfunction.

Before the event, teams should identify the circuit that will be wired through the shutdown relay.

• The shutdown relay must turn off the engine when the relay is activated.
• Connections can made be from N to NC (Normally Closed, will open when relay is activated) or from N to NO (Normally Open, will close when relay is activated) depending on system configuration
• Maximum current = 10 amps

IT IS REQUIRED TO CONNECT THE SHUTDOWN RELAY DIRECTLY TO THE ECU, RATHER THAN TO THE IGNITION COIL DUE TO EMI PROBLEMS

The shutdown relay must disable vehihle propulsion when the relay is activated. Connections can be made from N to NC (Normally Closed, will open when relay is activated) or from N to NO (Normally Open, will close when relay is activated) depending on system configuration. Maximum relay current = 10 amps.

• Option 1 disables throttle input when activated
• Option 2 disables motor control when activated
• Option 3 grounds motor controller when activated

Other methods will be accepted as long as the drive system is disabled when the relay is activated

Shutdown Relay Connection Examples