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Specifications subject to change without notice. | GAGC06_E_0516 | USA 200303 | Page 26 of 41
DGC6 – UserManual
Horn function resettable:
The activated horn can be permanently reset with this function.
The following possibilities to acknowledge are available for the alarm relay as horn relay:
• By pressing the left button (ESC). Only available in starting menu.
• Automatic reset at the end of the preset time (active, if value > 0).
• By an external pushbutton (assignment of the appropriate digital input DI: 1-n).
Due to fixed polling cycles, external buttons must be pressed for a few seconds before the reaction occurs.
After successful acknowledgment the horn remains permanently reset until all assigned alarms for this relay function
are inactive again. Only then will it be triggered in case of an alarm.
Acknowledge the horn relay:
Reset command by external push-button or one of the operating keys.
Alarm 4
On
Off
Gas concentration higher
lower than threshold
Acknowledging
signal
On
Off
Time
Relay 4
On
Off
Special function Recurrence of the horn relay
After an alarm has been triggered, the horn will remain active until a reset action is performed. After acknowledgment
of the horn relay/s (clicking a button or via external DI input) a timer starts. When this time has expired and the alarm
is still active, the relay is energized again. This process is repeated endlessly as long as the associated alarm remains
active.
Reset command by external push-button or one of the operating keys.
Alarm 4
On
Off
Gas concentration higher
lower than threshold
Acknowledging
signal
On
Off
Relay 4
On
Off
Time
Time
4.8.2.6 External Override of Alarm / Signal Relay via DI
Manual operation of the alarm relays via DI does not trigger the “special mode”, as designed. The use of the override
should be used with caution, particularly the function of setting an “external OFF”.
Assignment of a digital input (DI) for the external switching on and off of the alarm relay.
This function has a higher priority than gas alarms.
If External ON and External OFF are configured simultaneously to the same relay and both are active at the same
time, so in this state, only the External OFF command is executed.
In this mode, too, the relays work respecting the parameter settings “Steady / Flash” and “energized / de-energized”.
Symbol
Description
Default
Function
DI 0
External ON
0
As long as DI 0 is closed, relay switches to ON
DI 0
External OFF
0
As long as DI 0 is closed, relay switches to OFF
