When external interlocking option is enabled on NAC, a special interlocking timer
(3sec if only external interlocking is enabled) is started when a user credential is
presented. Any repeated attempt to gain access by providing a user credential
while the timer is running and the remaining time is greater than 100ms will
cause Access Denied Void and 7 error beeps. If access is granted and the door
becomes in access, this waiting time is bypassed and all the consequent
credential requests are processed without that delay.
A proposed sequence of user action on the interlocked doors is below:
- Present a credential (hear a single beep if it's a card or press enter if it's a pin);
- Wait for the NAC to confirm. NAC confirms with either 2 beeps if the credential
has a right to access or 7 beeps in case of a wrong credential. The waiting time
may be less than a second if no external interlocking is enabled or about 3
seconds if external interlocking is enabled;
- Proceed to the next step.
Interlocking is programmed on the Hardware tab of the Doors/Lifts form. See
the “Interlock options” section on page 63.
Alarm control
Note: Alarm control does not apply to the NAC in IP Direct mode.
The Network Access Controller can perform alarm control functions, such as
arming areas, if it is connected to a ChallengerPlus panel. Alarm control for each
NAC door is determined through alarm control levels, which are analogous to
alarm groups in Challenger.
Each alarm control level can be assigned a time zone:
In IP Extended mode, a NAC time zone can be assigned to an alarm
control level
In Classic mode, a ChallengerPlus time zone (either a “hard” panel time
zone or a soft time zone) can be assigned to an alarm control level
Each alarm control level can be allocated a list of up to ten areas for arming,
disarming, timed disarming, and resetting alarms. Other alarm control attributes
such as the ability to reset system alarms can be programmed for each alarm
control level.
A NAC door can have up to six alarm control levels, which are then assigned to a
door side (either IN or OUT) in any combination. Up to six alarm control levels
can be assigned to a door side.
If a user initiates some alarm control functionality at a reader (e.g. they badge
their card three times to arm areas), the NAC checks the alarm control levels for
the door that apply to the reader (depending on whether the reader is an IN or
OUT reader).
If any of the assigned alarm controls levels has a time zone that is valid, then the
user’s credential information is sent to the ChallengerPlus panel, along with
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