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Sub-Master (Slave) Time Server System 6844(RC)-SUB with NTP LAN Board(s) 7273(RC) / 7274(RC)

Short Description

By implementation of up to two (2) NTP LAN Boards 7273(RC) or NTP LAN Boards 7274(RC) (10/100/1000 Mbit/s autosensing, VLAN, Bonding, PRP) system 6844(RC)-SUB becomes a highly accurate NTP Stratum 1 Time Server for synchronization of computers and industrial networks.

System 6844(RC)-SUB can either be delivered with one or two implemented NTP LAN Boards 7273(RC) / one or two NTP LAN Boards 7274(RC) from the factory or subsequently extended by board(s) 7273(RC) / 7274(RC) in the field. The modular design structure of system 6844(RC)-SUB also allows the combination of one board 7273(RC) / one board 7274(RC) with any other function board suitable for system 6844(RC)-SUB.


Features of Base System 6844

  • Semi-modular system equipped with max. 2 function boards for system bus
  • Channels for parameterization//monitoring:
    • Keypad and operating menu via display
    • WEB-GUI and SNMP for function boards with LAN interface
  • Subsequent extension by additional function boards (depending on configuration of system 6844(RC)-SUB at time of delivery)
  • SyncOFF Timer (bridging of reception failure) providing an error-free operation even under difficult reception conditions
  • Redundant multiple test mechanism of the synchronisation signal providing a correct and leap-free signal evaluation
  • High free running accuracy
  • Maintenance-free back-up clock for three days
  • System completely maintenance-free
  • Options:
    • Activation of Remote Function of board 6844(RC)-SUB
    • Power supplies for various operating voltages
    • Redundant power supplies
    • Specific hardware and software customizations

Additional Features for System 6844RC-SUB (System 6844RC-SUB with activated Remote Function of Board 6844(RC)-SUB)

  • Channels for parameterization / monitoring:
    • Keypad and operating menu via display
    • WEB-GUI and SNMP for function boards with LAN interface
    • Serial connection via the hmc (hopf Management Console)
    • Optionally: LAN connection via the hmc including monitoring via SNMP
  • Additional internal signal outputs (RC pulses, additional IRIG-B signal)
  • Options for System 6844RC-SUB:
    • Prepared extension slot for upgrade of LAN Management Board 6844MNG (not applicable on 1U Slim Line version)
    • LAN Management Board 6844MNG for LAN connection via the hmc including monitoring via SNMP

Features of NTP/SINEC H1 LAN Board 7273(RC)

  • Alarming
    • SNMPv2c / SNMPv3 (MIB II, hopf Private Enterprise MIB, SNMP traps)
    • E-Mail Notification
    • SYSLOG
  • Routing for configuring static routes based on special network configuration requirements
  • SINEC H1 time datagram

Features of NTP/SINEC H1 LAN Board 7274(RC)

  • all features of NTP/SINEC H1 LAN Board 7273(RC)
  • 2 ethernet interfaces 10/100/1000 Mbit/s autosensing
  • Activation options:
    • VLAN support according to IEEE 802.1q
    • Port aggregation (NIC Bonding/Teaming) with support of IEEE 802.3ad trunks
    • Parallel Redundancy Protocol (PRP) according to IEC 62439-3
    • Precision Time Protocol (PTP) according to IEC 1588


The base system 6844(RC) is equipped with function boards for the output of required signals according to the provided customer specifications. The possible number of functions boards to be integrated and upgraded is primarily determined by the number of available slots in 19" rack and the power supply capacity.

Please note the following assignment:

  • Board number _ _ _ _ RC: only available for system 6844RC
  • Board number _ _ _ _ (RC): available for system 6844 as well as system 6844RC
  • Board number _ _ _ _ : only available for system 6844

Function Boards for System Bus

Function Boards

Synchronisation Boards and Modules

Management Boards



Time Server 6844 Time Server 6844 Time Server 6844


Time Server 6844 Time Server 6844 rear


PDF documents

Software and Driver