Din rail NtpServer

Din rail NtpServer - introduction

Server is dedicated to synchronize network devices own local time/date to UTC. Devices synchronizing own local time through the NTP V3 protocol.

By this way GPS Time Server is connected to atomic cesium standard nist.datum.com over the GPS satellite system.

Built in WEB page for status monitoring, setup the network values. NTP Ver3 supported in Client - Server mode, NTP Broadcasting supported also. SNMP traps production on every lost of UTC FIX status.

• Ethernet connectivity 10baseT, RJ45 connector. The main electronics is placed in-to the DIN Rail case, suitable to mount in server rooms. Powered from external DC power source 9..24V GPS receiver with antenna are placed outdoor in waterproof case IP-65.

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Connection between GPS receiver and server is made through the standard TP twisted pair cable. Max cable length is 100m.

Din Rail Technical specification

Ethernet

• 10 Base T, RJ 45 connector
• 10 MBit
• RX polarity: automatic
• ICMP: implemented
• Gateway: implemented, user configurable
• DHCP: not allowed
• MAC address: configurable
• Ethernet mask: configurale

NTP Protocol

• Built in NTP ver 3.00
• Client Server mode
• Broadcast mode
• security: not implemented
• Time stamp resolution: 13usec

SNMP protocol

• Built in only SNMP traps
• server produces and sends SNMP traps to dedicated IP address device
• message sent: on UTC lost fix changes

Main processor

• RISC UBICOM IP2022
• 120 MHz / for Ethernet connectivity 10BaseT

Real Time Clock

• PHILIPS I2C
• powered from lithium CELL CR2430, User Replaceable
• Max Error: 20 ppm

Security

• User password to setup IP address
• SNMP strings - community name...

Web Interface

• Built in WEB server for dynamic CGI WEB pages
• user downloadable via TFTP protocol
• Purpose: monitoring server status
• setup time server
• Storage: 4Mbit dataflash

GPS

GPS

• External receiver with active antenna
• Powered from server
• Output protocol: ZODIAC Connexant
• Baudrate: 9600Bps
• PPS pulse: 1sec
• Power: 9..24V DC
• Current consumption: 100mA / 12V

• Cable

  • 1 twisted pair for zodiac data
  • 1 twisted pair for PPS pulse
  • 2 wire for power
  • max cable length: 200m

Time Accuracy

• UTC maximum error: 300 nsec
• due to NTP time stamp resolution 13usec device completed accuracy = 13usec

Din Rail casing

Temperature Ranges

-25 .. 55 'C

Power

• 9.. 24 V DC
• Consumption 100mA / 12V

Server Case

Din Rail