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F
C
AULTS AND
AUSES OF
7
Faults and Causes of Faults
Faults are signalled by the drop-out of the alarm relay and output as a common signal; a line
ERROR is transmitted to the system 7001RC.
If no faults / errors are present the alarm relay is re-activated.
In the event of a fault, the last-transmitted line time is stored, so that the clocks can be re-
set, automatically and without service intervention, after the fault has been removed.
The following faults are signalled:
System 7001RC or Slave Clock Control Board 7406RC has failed or power supply
unit is defective
Fault on Line 1 or Line 2 (e.g.: failure of the external or internal line power supply,
line cable disconnected or short-circuited, line voltage too low)
System 7001RC failure reception status "FUNK" (RADIO) (system synchronisation is
faulty)
7.1
Line Failure / Line Voltage Power Failure
A short-circuit or line break in parts of the installation can interrupt the pulse output.
By feeding back the slave line to the monitoring inputs, faults such as short-circuit, line
voltage power supply failure, insufficient line monitoring voltage or line break in the clock
equipment are identified and signalled via corresponding Error LED's and alarm relays.
For clocks with pole-changing pulse operation:
In the event of one of the above-named faults, the Slave Clock Control Board
-
stops the output of the pole-changing pulses. The alarm relay is activated and
the "Error LED's" of the faulty line(s) are lit up on the front panel.
-
An attempt is made to make good the lost pulse until the line monitoring has
measured sufficient voltage on the monitoring inputs.
-
After the fault has been removed, failed pulses are automatically made good,
so that no additional clock setting is necessary.
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: info@hopf.com
F
AULTS
Error LEDs lit as soon as a pulse can no longer be restored.
Error LEDs only go out after the fault has been removed and the next
minute change has been completed.
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