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5
NTP Server Sentinel
®
Installation and Operation Manual
INSTALLATION
Installation
The NTP Server Sentinel® interfaces to external equipment through removable
euroblock screw terminals. The terminals accommodate wire sizes from 16 - 28
AWG solid or stranded wire. Before installing a wire, remove the euroblock screw
terminal plug and turn each capture screw fully counterclockwise. Strip each con-
ductor to a length of 0.25” and insert the conductor fully into the terminal. Turn the
capture screw fully clockwise to secure the conductor.
Surge Protection
The NTP Server Sentinel® has built-in resistance to voltage changes; we recom-
mend that you use a power surge protector or line conditioner on the incoming AC
line. Lightning strikes and/or other high voltage surges may damage your NTP
Server Sentinel® and connected equipment if it is not properly protected. For light-
ning protection devices, check out www.polyphaser.com and www.itwlinx.com.
UPS Standby Power System
We recommend that you connect your NTP Server Sentinel® to a UPS system. A
UPS helps minimize the risk to the NTP Server Sentinel® and provides power dur-
ing a power outage.
DC POWER connector
This is the connector used to power the unit. Never use any type of power supply
other than the specified power supply.
“CHS GND” Chassis Ground
This is the chassis ground terminal. The station ground should be connected to the
chassis ground terminal using a 20 to 24-gauge wire.
“LAN/NET” network RJ45 connector
Connect one end of the supplied CAT5 (straight or crossover) cable to the desired
ETHERNET (WAN/LAN) or PC port.
“DEF” Defaults button
Hold down this button while powering the device up to reset the unit to defaults.
“1PPS” / “GND” One Pulse Per Second Output
The 1 PPS logic output provides an active high 100ms pulse per second. This out-
put may be used to drive clock systems.
“STC” / “GND” Serial Time Code Output
STC (Serial Time Code) active high driver logic output. Output format (ESE TC90
or TC89) and frequency (30 hz or 60hz) configurable from web interface. Also avail-
able on the BNC connector labeled “STC.”
CAUTION!
Installation of the NTP
Server Sentinel® in high
RF environments should
be performed with care.
The station ground
should be connected to
the designated chassis
ground terminal using a
20 to 24-gauge wire.
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