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Dallmeier electronic GmbH & Co. KG
Digital HD Recorders DMS/DLS
5.6
Quiescent-current monitoring
Thanks to the quiescent-current monitoring, a connected alarm
system (usually a burglar alarm) can trigger an alarm if the recorder
fails or the connection between the recorder and the burglar alarm
is manipulated.
NOTE
The description Principle of quiescent-current
monitoring is only relevant if a peripheral device
to be secured via quiescent-current monitoring in
accordance with VdS has been connected.
5.6.1
Principle of quiescent-current monitoring
The burglar alarm is connected to one of the five relay outputs.
Relay 1 is used in the following example.
The switch assigned to relay 1 (DIP switch, SW5) must be open to
ensure current flow via R1.
NOTE
In the state of delivery, all DIP switches of SW5
are closed. For R1 to not be bridged, you must
open the appropriate switch. This is switch 1 when
using relay 1.
Relay 1 must be configured as an NC contact at the recorder.
In “normal operation”, you now
have a closed circuit from the
burglar alarm (internal resistance
Ri) via relay 1 and resistor R1.
Flowing current IR corresponds to
the quiescent current of the burglar
alarm.
Fig. 5-9: Principle of quiescent-current monitoring
SW5
Rel 1
R1
at X12
Burglar alarm
Ri
IO-PCB
U
IR
Summary of Contents for DLS 24 S1
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