User manual

Masterclock www.masterclock.com
5
Power, Accessories and Software
The list of accessories below is for illustrative
purposes. Refer to your sales order for actual items
shipped.
CLDNTD12 digital-analog display (clock)
Mounting bracket
Cat 5 patch cable
CD-ROM (with WinDiscovery software application
and User Manual pdf)
Power cord
PoE (Power over Ethernet) models require an IEEE
802.3af compliant PoE injector or switch with +48VDC
output on spare pairs of the network cable conductor
4 and 5, with corresponding 48 VDC returns on pins 7
and 8 or by sharing the data pins and their returns.
This single network cable carries both data and
power. Maximum cable distance is 328 feet (100m).
RELAY OPTION
When the CLDNTD12 digital-analog display is not
locked to a NTP reference, the dry contact relay
will actuate.
The CLDNTD12 request time from the primary NTP
time server. If no response, then it will send a request
to the secondary NTP time server. If the CLDNTD12 is
unable to communicate with either NTP time servers,
the CLDNTD12 will change its Current Reference from
“NTP” to “Internal Osc (oscillator)”. This is considered
an un-locked condition and the dry contact relay will
actuate.
Cat5 patch cable CD-ROM
Above: DC power Insert the DC power cord
into the 2.1mm connector located on the
back panel.
Below: Ethernet PoE Insert the CAT5
Ethernet patch cable (included) into the RJ45
socket.