NEKA 5
The Memory and Alarm flash sequences are as follows:
Under low battery conditions, the siren bypasses the flash and use the residual charge to power the loudspeaker (NEKA and
NEKA-F only). This status is signalled on terminal G (NEKA and NEKA-F only). This terminal (open collector) is connected
to ground during standby status, but disconnects in the event of low battery (NEKA and NEKA-F only), or damage to the loud-
speaker or flash.
No Trouble: the loudspeaker emits an acoustic signal and the flash blinks once.
Battery trouble: the loudspeaker emits two acoustic signal and, if battery charge is sufficient, the flash blinks twice.
Flash trouble: the loudspeaker emits three acoustic signal.
Loudspeaker trouble: the flash blinks four times.
The above listed signalling are displayed every 5 seconds until troubles are present or the jumper is removed. The siren runs the
power-up sequence when the jumper is removed.
If troubles are not present, the inhibition of siren activation is delayed between 30 seconds and 2 minutes, to prevent this
function being used to tamper the siren.
In this phase, anti-foam device can be tested as FT output activates as soon as the infrared barrier of the device is interrupted
(NEKA-F and NEKA-FS only).
Alarm priority
The siren priority is as follows:
Higher priority alarm always overrides lower priority alarm, generating a variation in the audible signal.
A and F terminals have the same priority because the acoustic signalling activated by terminal A does not interfere with the
optical signalling activated by terminal F.
The alarm time is counted from activation of the loudspeaker and strobe/flash.
NEKA/NEKA-F ON (ms) OFF (ms) Description
Alarm flashing 250 750 Standard Blink
Memory flashing 250 1500 Slow Blink
NEKA-FS Frequency (Hz) Description
Alarm flashing 1 Standard Blink
Memory flashing 0.6 Slow Blink
When S and T’s pins are connected as shown at the side, siren activation is inhibit and the siren displays the trou-
bles as following.
Alarm Priority
Internal tamper 1
+N 2
AF 3
A 4
F 4
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