66
Critical elements to maintain a properly operating T-DAR
installation
Once correctly installed, the T-DAR system does a superb job of detecting violations
of access control security systems. In order to accomplish this task, the T-DAR
requires several critical elements and/or signals from the door and the access
control system as detailed in this manual. If, after installation, environmental or
access control signal conditions become degraded, the T-DAR system may not
operate properly. Consult the Installation/Setup sections of this manual for the
correct values for these elements. Some of the most important factors that could
cause improper operation are:
1.
Additional or changed programming of the access control system may
cause changes in its output to the T-DAR system.
A.
Valid access grant signals must be immediate.
The valid
access signal from the access control system must by occur at the
same time or before the door is unlocked to allow an entry and must
have duration of at least 300 ms. In some instances this may require
the use of a timer module to allow for adequate lock activation time
. In
all circumstances, if a person crosses the door threshold prior to the
receipt of a valid access grant signal by the T-DAR unit, that person
will cause an alarm by the T-DAR system
. Especially in the case of
installations where multiple valid entries are allowed on a single door
open cycle, it is critical to confirm that the valid entry signal is reaching
the T-DAR unit prior to a person crossing the door plane and that a
separate signal for each valid entry is received by the T-DAR unit.
B.
Door contact/door position switch signals must be
immediate.
These signals must be sent to the T-DAR unit at the same
that the door is opened. Unless it can be verified that the access
control system can give immediate door open signals, the T-DAR unit
must have an independent circuit for this function that allows isolation
from the access control system. It is recommended that mechanical
switches of the roller and plunger types be avoided in favor of
magnetic switch door contacts.
Summary of Contents for T-DAR T1000
Page 12: ...12 Figure 2 T DAR Control Unit CAD...
Page 14: ...14 Figure 4 T DAR Annunciator CAD...
Page 16: ...16 Figure 6 T DAR Stereo Tracking Head...
Page 18: ...18 F igure 8 T DAR Door Encoder...
Page 20: ...20 Figure 10 T DAR Event Camera...
Page 22: ...22 Figure 12 T DAR Cable Extender Amplifier CAD...
Page 37: ...37 Figure 16 Typical Dry Configuration...
Page 89: ...89...
