STI Alert Point, Installation Manual & User Manual

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Installing External Detectors
With the front cover removed
Step 1. Ensure that the unit is switched ‘OFF’.
Step 2. Disconnect the Zener diode.
Important: Please ensure all detectors have their own power source and
are wired correctly in accordance with their own installation manuals.
Warning: Incorrectly installed external devices may cause irreversible
damage to the Alert Point.
Step 3. Insert the external detector wires into the correct terminals, tighten down the
corresponding terminal screws ensuring wires are securely trapped.
Step 4. There is no DIL switch setting change to activate the external detectors, the
Alert Point is constantly monitoring for a loop connection. The Zener diode
creates the loop and must remain connected to the detector terminals at all
times even if no detectors are being used. If the Zener diode is removed the
Alert Point will trace a break in the loop and signal a fault. The Zener diode
must be installed at the end of line when linking detectors off the detector
terminals otherwise a fault will be signalled.
Step 5. Turn the unit `ON’ using the master key switch.
Step 6.
The LED will now flash green every 8 seconds (or will remain constant if
connected to an external power supply), indicating that the unit is functioning
correctly.
Step 7. To test the installation of the external detectors, firstly trigger one of the
external detectors, this should send the Alert Point into ‘alarm ‘condition.
Please note:
The Alert Point will only return to ‘standby’ condition, after
the triggered detector has been reset.
It is recommended that the maximum wiring length from the detector terminals on
the Alert Point to the final detector in the loop, should not exceed more than 50 metres.
5V6 Zener diode
External detector +
External Detector -
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