STI AP-1-G-I - Manual (Page 7)

Networking the Alert Point
Any alarm condition to one of the Alert Points, will also trigger the linked units’ integral sounder and
the LED (flash red) to indicate the fault. Any external output devices that are installed to any of the
Alert points will also be activated if programmed to do so. Note: It is recommended that wire lengths
between individual units do not exceed 50m (including ‘return loop’ wire between last & first units).
Networking only 2 units - (ensure the front cover is removed)
Step 1. Ensure that both units are switched `OFF’.
Step 2. DIL switch SW12 should be `ON‘ on both units
(the Alert Point expects to be connected to a second unit).
Step 3. Alert Point 1: Insert wires into the network terminals
on the Alert Point (as shown opposite).
Step 4. Alert Point 2: When connecting into the network terminals
ensure the `Network In’ and the `Network Out’ wires
are switched over (as shown below).
Step 5. Turn both units `ON’ using the master key switch.
Step 6. Both LEDs will now flash green approximately every 8 seconds indicating that
both units are functioning correctly.
Step 7. TEST: Alert Point 1
Depress the operating element, this will send the Alert Point into `full’ alarm condition, with
the activation flag dropping into view, the LED flashing red and integral alarm sounding.
Alert Point 2: Will immediately trigger into alarm, the LED will flash red and the integral
alarm will sound.
Resetting the networked Alert Points, can only be done by manually resetting the original
activated unit (e.g. Alert Point 1 from this test) using the reset key. This will return both units
back into `standby ‘condition.
Step 8. The above test should now be reversed.
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AP1 AP2
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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 -