Connecting External Relays To Enable Helios Functions - Starcom Systems Helios Installationsanleitung

Connecting External Relays to Enable Helios Functions

This section provides guidelines on how to wire the Helios output pins that require the
addition of an external relay. This is not an exhaustive discussion and there are many
possibilities – you should consider which option is best before commencing.
Check the vehicle voltage (12V or 24V) before beginning work and
Note:
provide relays of the correct voltage.
Immobilizer and Gradual Stop
The Helios can bring the vehicle to a gradual stop if necessary. For example, if the
vehicle is reported as stolen, the control center can issue a Gradual Stop command.
When there are no alarms, the Immobilizer/Gradual Stop pin (#1) grounds the coil
(#85) of the external relay. In this case, the relay powers the vehicle starter or fuel
pump (via pin #87).
When a Helios alarm is activated, the Immobilizer/Gradual Stop pin (#1) toggles the
ground to the relay coil. As the duty cycle of pin 1 changes, the coil becomes
gradually deactivated for longer and longer intervals until it is fully disconnected from
ground. Consequently, the starter or fuel pump gradually becomes inactive, bringing
the vehicle to a gradual stop.
Figure 5: Immobilizer and Gradual Stop Wiring Scheme
Installing the Helios 16 Simulation Kit Manual