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B
OARD INTERFACES
5
Board interfaces
The Master Board 7020 has different interfaces which are on the front panel or on the 96-
pole VG ledge.
5.1
Serial Interface
Valid for all systems
In the front panel of the Master Board there is a 9-pole SUB-D male connector containing a
RS232 and RS422 service interface.
The transmission parameters are fixed and cannot be changed.
• Baudrate 9600
• no parity
• 8 data bits
• 1 stop bit
• no handshake
5.1.1 Interface Allocation
The RS232 and RS422 pin allocation of the SUB-D male connector 9-pole
5.1.2 Standard Data Output RS232/RS422
The Master/Slave-String for synchronisation of other hopf systems is transmitted or re-
ceived via the serial data output.
The data string is transmitted in the 59th second of every minute with a second advance of
1 second. The last character is transmitted exactly on the minute change and so switches to
valid time. With a transmission rate of 9600 baud the time delay for reception is approx.
1.1 msec. This time delay is taken into consideration in hopf systems which are synchro-
nised via a serial data string.
The transmission includes the complete time information of the local time. The time differ-
ence to UTC in hours and minutes is also transmitted. Transmission is in BCD. The maxi-
mum time difference is ±11.59 hrs..
7001GPS Satellite Clock System - V08.00
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
Pin
1
2
3
4
PPS pulse / Error Message
5
6
7
8
9
Signal
DCF77 pulse
RS232-RxD
RS232-TxD
GND
RS422-TXD
RS422-/TXD
RS422-RXD
RS422-/RXD
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