18
Control Relay Operation in LOW/HIGH Temperature ALARM application
Internal Relay can be controlled by Low/High Temperature Alarm
ONLY
when Function
Fn 37 is NOT ENABLED
.
Internal Control Relay operates in two different modes depending upon the setting of
Function Fn 18
.
1. When function Fn 18 is enabled, Internal Relay will be switched
OFF when Temperature ALARM occurs and ON when
there is NO ALARM condition.
2. When Fn 18 is NOT SELECTED, the Internal Relay will ONLY be switched
OFF in response to HIGH Temperature
ALARM and ON when Temperature is lower than HIGH ALARM preset
, even if it is lower than LOW ALARM preset.
When
RELAY LATCHING
is enabled (by setting function
Fn 16
), once energized it will remain
ON
even if temperature falls
back within the NO-ALARM range. The relay may be reset manually by pressing
CLR
key twice while temperature is
NOT in
the Alarm
range.
Control Relay in COUNT-DOWN TIMER/COUNTER ALARM application
Internal Relay can be controlled by Count-Down Timer/Counter
ONLY
when Function
Fn 37 is ENABLED
.
Two modes of Relay control are possible depending upon the setting of Function Fn 18.
1. When Fn 18 is
Enabled
, Internal relay will be switched
OFF
in response to Count-Down Timer/Counter Expiry (ALARM) or
when Timer/Counter is not running. It will be
switched ON
while Timer/Counter is running.
2. When Fn 18 is
Disabled
, Internal relay will be switched
ON
in response to Count-Down Timer?Counter Expiry (ALARM)
and will remain NORMALLY switched
OFF
in all other conditions.
In both of the above modes, activate
SET
key to Reset the Internal Relay to
OFF
state and Reset the Timer/Counter.
Control Relay in COUNT-UP TIMER/COUNTER application
Internal Relay is
NOT controlled
by Count-
Up
Timer/Counter.
ALARM BUZZER Operation
Alarm Buzzer is always operational in WAKE-UP ALARM Clock mode.
In ALL OTHER modes Internal Alarm Buzzer operates only if
Function Fn 17
is enabled. Buzzer will sound in ON/OFF
fashion for as long as the Alarm Conditions exist.
Alarm Buzzer may be SILENCED
at any time by pressing
MUTE
key and it will remain silent until present alarm is reset
manually or automatically and a new alarm occurs.
In Programmable Event Timer
modes, the Buzzer will sound for as long as it is programmed to do so.
ALARM SIREN
10 Amp Max.
OBSERVE SUPPLY AND LOAD POLARITY
EXTERNAL
SIREN
POWER
SUPPLY
Alarm Siren Application Using External Power Source
EXTERNAL
FUSE
10 Amp Max.
ALARM SIREN
12 VDC, 1 Amp Max.
OBSERVE SUPPLY AND LOAD POLARITY
WIRE
JUMPER
DC Alarm Siren Application Using Internal DC Source
RED
BLACK
NO - C - NC
+
12V
-
Screw Terminal with
INTERNAL RELAY
And
INTERNAL
DC SUPPLY
NO - C - NC
Screw Terminal
with
