Dokument: 1872en02.doc
Förf.: TAn
Datum: 2010-11-16
Sida: 2 av 13
WESTERSTRAND URFABRIK AB
Box 133
Tel. 0506 48 000
Internet::
www.westerstrand.se
545 23 TÖREBODA
Fax. 0506 48 051
E-mail:
Allmänt
This product is a digital clock for indoor use
which is synchronised via NTP.
The user can set the light
intensity by a potentiometer inside the clock. The user can set the light intensity. At power failure the time is
updated in a Timekeeper circuit. After the power failure the digital clock starts up on correct time.
The network setting is made via a WEB-browser.
When synchronised, the clock is automatically set to correct time. The colon will flash when time from the NTP
server is accepted.
All versions display time in hours and minutes. Time is expressed in 24 hours format. Seconds are
shown graphically in a circle.
If time is not initially programmed "--:--" is shown instead of digits for time.
LAN connection
The digital clocks are equipped with a RJ45 (10BASE-T) connector for direct connection to the LAN via an
Ethernet switch. Each clock has a unique IP address. The IP address, gateway, subnet mask and server IP
address is set up via a WEB-browser. If DHCP is used the clock will receive its IP address automatically from
the DHCP server.
The clock is delivered with DHCP, fall-back adress 192.168.3.10.
The MAC-address is labelled at the clock.
NTP
To distribute correct time to different users in a Local Area Network (LAN) the Network Time Protocol (NTP)
is used. NTP is a part of the protocol family TCP/IP. Westerstrand digital clocks type Ethernet LAN are
operated and controlled by Time distributed in the Network.
What happens if power is down?
If power is down the diodes are turned off. The internal clock continues to keep correct time at least during 24
hours. When power is up again correct time is displayed directly.
