Switch-Box - System 5000 was designed and developed for setting up redundant clock systems in the 'hot standby function with automatic status-dependent signal switchover' operating mode.
Switch-Box - System 5000 is used when the most stringent demands are placed on the availability of a clock system.
The Switch-Box ensures that the signal output to the customer application is carried out at a low error level via the Clock System.
The Switch-Box realizes this fault-dependent signal switchover between the master and its redundant system by monitoring the status of the respective clock system. The Switch-Box can be configured in two different operating modes for this purpose:
Dynamic Error Status (for System 7001 and 7001RC)
In order to output the status information to the Switch-Box, clock systems 7001 and 7001RC generate special status information which can be picked up via a SUB-D connector on the front panel of Control Board 7020/7020RC.
Different priorities can be assigned to the various error messages in the clock systems in order to define optimum switchover conditions for the customer's application.
The clock systems can be monitored for 4 conditions in this mode:
Total failure / line breakage
Major fault
Minor fault
System O.K.
Static Error Status (for Series 6000 systems)
This mode was designed for Series 6000 clock systems; however in this mode the Switch-Box can also be controlled by external systems (on providing the required signals at a suitable signal level).
Two static signals of the clock systems are monitored in this mode:
Operation/voltage O.K.
Synchronicity O.K.
Due to the system's modular construction, the Switch-Box can easily be adjusted to the respective customer requirements or upgraded by the customer at a later date.
Thus specially adapted Switch-Boards, which generally facilitate easy connection between Switch-Box and clock system, are available for the various clock system output boards.
The basic system comprises:
1/1 19" rack 3U/84HP
Standard power supply unit with 115/230V AC / 30VA (47-63Hz)
Other input voltages and power supply units available
Incoming voltage feed with mains switch and line filter
Connection for protection earth cables up to 16mm²
System front panel with status LEDs
