Siemens SIMEAS Q80 Operating Instruction page 116

E-40 SIMEAS Q80 7KG8080
10.3 Synchronization
The simplest synchronization method for SIMEAS Q80 7KG8080 devices is to use
connection. If the devices are connected via the network interface, then if there is an NTP-Server this line can be
used for synchronization.
Further, on the terminal panel there is a BNC socket labeled SYNC. Depending on the configuration, an external
synchronization signal (DCF77, GPS or IRIG-B) can be received or used to synchronize several devices with each
other.
Technical specification of the synchronization.
10.3.1 Type of synchronization signal
10.3.1.1 DCF77
The DCF77 signal is applied via the BNC socket
TTL signal e.g. 1 Hz pulse. As well, inverted signals are recognized and evaluated by the hardware.
Duration of synchronization: The complete time is encoded within one minute and begins at the start of the next
minute.
For this reason the minimum duration for the synchronization process is at least one minute!
10.3.1.2 IRIG-B
The IRIG-B signal is applied via the BNC socket
and supports IRIG-B002, B000, B001, B003.
For all models, the pulse rate is 100 pulses per second, DC Level Shift (DCLS), width coded, no carrier. The last
digit indicates the correct information:
B000 BCD, CF, SBS
BCD, CF
B001
BCD
B002
BCD, SBS
B003
Duration of synchronization: With a typical synchronization time of approx. 20s, the IRIG-B is the fastest model
available.
10.3.1.3 GPS
The GPS receiver is connected at the 9-pin DSUB terminal
7KG8080. In this way, the GPS receiver finds its positions as soon as the device is activated.
Duration of synchronization process: The minimum duration for synchronization depends on the reception and
on the last location of use. Upon first use, the receiver needs a few minutes until multiple satellites and its own
position have been located. Upon the next start, the last position data are usd, and the satellites are found found
more quickly.
With a direct line of sight to the sky, the receiver is typically synchronized within one minute.
Power Quality Recorder SIMEAS Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 09.02.2011
74
SYNC
DCF77 TTL signal with inverted logic (Low active)
SYNC
BCD - Binary Coded Decimal, Code of the time (HH,MM,SS,DDD)
SBS - Straight Binary Second of day, daily second (0....86400)
CF - Control Functions, depending on application
NTP
. SIMEAS Q80 7KG8080 processes a LOW active 5 V
39
. SIMEAS Q80 7KG8080 processes a 5 V TTL signal
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"GPS ". The supply is provided via SIMEAS Q80
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via the Ethernet
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