2N Access Unit Configuration Manual
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5.5.2 Date and Time
If you control validity of lock activation codes and similar by time profiles, make sure that
the
2N
Access Unit
internal
date and time are set correctly.
2N
Access
Unit
is
equipped with a back-up real-time clock to withstand up to several
days’
long
power outages. You can synchronise
the
2N
Access
Unit
time
with your PC anytime by pressing
the
Synchronise
button.
Practically,
the
2N
Access
Unit
real-
time circuit accuracy is approximately ±0,005 %, which may
mean a deviation
of ±2
minutes per month. Therefore, we recommend you to synchronise time
with the NTP server to achieve the highest accuracy and reliability.
The
2N
Access
Unit
sends
a
query to the NTP server periodically to update its time value.
•
Note
The
2N
Access Unit
does not need the current date and time values for its basic
function. However, be sure to set these values when you apply time profiles and
display time of listed events (Syslog, used cards, logs downloaded by
2N
IP intercom
HTTP API, etc.).
