Kera SELENA - EXTERNAL ALARM SIREN; BUZZER Wiring

SELENA Multifunctional LED Clock USER MANUAL V32D
KERA TECHNOLOGIES INC. 2013 www.ledclocks.com
24
INTERNAL CONTROL RELAY in COUNT UP / DOWN TIMER / COUNTER ALARM application
The Internal Relay can be controlled by the Count UP or DOWN Stopwatch/Timer/Counter ONLY when the Function Fn 37 is
ENABLED.
Several control modes of the Internal Relay are possible depending upon the settings of the functions Fn 16, 18 and Fn 49.
1A. When Fn 18 is Enabled and Fn 16 Disabled, the Internal relay will be switched OFF in response to the Count Up or
Down Timer/Counter Expiration (ALARM) or when the Timer/Counter is not running. It will be switched ON while the
Timer/Counter is running.
1B. When Fn 18 is Enabled and Fn 16 Enabled, the Internal relay will be switched ON while the Timer/Counter is
running. It will remain switched ON until either the SET key or the CLR key is pressed, or the external RESET input is
activated.
2. When Fn 18 is Disabled and Fn 16 Disabled, the Internal relay will be switched ON in response to the Count Up or
Down Timer/Counter Expiration (ALARM) and will remain NORMALLY switched OFF in all other conditions.
3. When Fn 49 is Enabled, the Internal relay will be switched ON in response to the Count Up or Down Timer/Counter
Expiration (ALARM) only for a period of 3 seconds and will remain NORMALLY switched OFF in all other conditions.
In all of the above modes, to Reset the Internal Relay to the OFF state and to Reset the Timer/Counter, press the SET key or
the CLR key, or activate the external RESET input ( if installed ).
EXTERNAL ALARM SIREN / BUZZER Wiring
The two wiring examples below show how to connect the external Siren or Buzzer to the internal control relay contacts. This
setup may be used with the Multi-Event Programmable timer functions or the Programmable UP or DOWN timer/stopwatch.
INTERNAL ALARM BUZZER Operation
The internal Alarm Buzzer is always operational if the clock is in the WAKE-UP ALARM Clock mode ( Fn 39 disabled ).
In ALL OTHER modes the Internal Alarm Buzzer operates only if the Function Fn 17 is enabled. The Buzzer will sound in an
ALARM SIREN
10 Amp Max.
OBSERVE SUPPLY
AND LOAD POLARITY
EXTERNAL
SIREN
POWER
SUPPLY
Alarm Siren wiring Using External Power Source
EXTERNAL
FUSE
10 Amp Max.
ALARM SIREN
FOR 12 VDC, 1 Amp Max.
OBSERVE SUPPLY AND LOAD POLARITY
WIRE
JUMPER
DC Alarm Siren wiring Using Internal DC Source
RED
BLACK
NO - C - NC
+
12V
-
Screw Terminal with
INTERNAL SPDT RELAY
And
INTERNAL
DC SUPPLY
NO - C - NC
Screw Terminal with
INTERNAL SPDT RELAY