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7406RC Slave Clock Control Board for System 7001RC - V02.03
hopf
Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
For DCF77 time code clocks:
-
The alarm relay is activated and the corresponding "Error LED(s)" are lit up on
the front panel. The lines are switched to a "backup power supply" optionally. In
this way the DCF77 time code clocks can continue to run in quartz mode.
In the case of a short fall of the line voltage the DCF77 Time Code pulses
are transmitted furthermore. The result is that some of the DCF77 Time
Code Clocks are still running and other clocks which are further away are
not running anymore.
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After the fault has been removed, the output of the DCF77 time telegram
continues and voltage is supplied to the clocks again from the "standard power
supply source".
7.2
Reverse Polarity
The most common fault is the reverse polarity of individual clockworks or the entire backup
clock chain for pole-changing pulse operation.
Effect:
Individual clockworks or the entire clock line run one pulse (minute / second) behind. Even
after the line concerned has been stopped the faulty clocks lack one pulse.
Removal:
Stop the slave line via the 7001RC menu
Reverse the connection(s) of the clocks (chain) concerned
Set all clocks on this line to the same time (e.g. 12.00.00)
Read off the time on the slave line and input in the menu as the new slave line time
