Dräger REGARD 3900 Serie Instrucciones De Uso página 73

The relays can be configured in different ways:
– Latching relays remain activated (in the alarm status) if an alarm state has
occurred, but is no longer present.
– Non-latching relays are deactivated (return to non-alarm status) if an alarm state
is no longer present.
– Acknowledgeable relays can be disabled manually (reset to non-alarm status) if
the alarm state is still present. This allows external warning devices to be turned
off or muted when the alarm state is still present.
– Non-acknowledgeable relays cannot be deactivated when the alarm state is
present.
– The alarm locking relays are activated when the internal inhibit switch is moved
to the maintenance position. For further information see: "Power and inhibit
LEDs", page 72.
Latching or non-latching
Settings
Latching
Non-latching
Acknowledgeable or non-acknowledgeable
Settings
Acknowledgeable
Non-acknowledgeable
6.6 Control buttons (and remote acknowledgement)
Acknowledge/OK
Acknowledges activated alarms, faults and messages shown on the display. When
this button is pressed, depending on the assigned transmitter signal and the control
unit settings, the following occurs:
– Alarm and fault LEDs on the control unit go out or start to light up permanently.
– The internal acoustic alarm sounder is muted.
REGARD
Meaning
The relay must be manually reset after an alarm has
been activated.
Press Acknowledge/OK or carry out a remote
acknowledgement:
– If the alarm state no longer exists or the relay is
acknowledgeable, the relay immediately returns to
non-alarm state.
– If the alarm state is present, the relay returns to
non-alarm state as soon as the alarm state no lon-
ger exists.
The relay automatically returns to the non-alarm state
as soon as the alarm state no longer exists.
Meaning
The relay can be reset automatically if the alarm state
exists.
Press Acknowledge/OK or carry out a remote
acknowledgement - the relay returns to the non-alarm
state.
The relay cannot be reset manually. The relay auto-
matically returns to the non-alarm state as soon as the
alarm state no longer exists.
®
3900
Operation