Meinberg DCF77 PCI510, Operating Instructions Manual, Page: 13 / 22

13
Pin assignments of the 9 pin connector
When the clock is being shipped, only the signals needed for the serial port are gated
to their pins at the 9 pin connector. If another signal shall be available outside the
computer, the corresponding lever of the DIL switch on the board must be set to the
ON
position to connect that signal to its associated pin.
Whenever an additional signal is connected through to the rear panel, special
care must be taken to the configuration of the cable used with the connector. If
pins with TTL level and RS-232 levels are connected to each other, the circuits on
the board may be damaged.
The table below shows the assignments of the 9 pin connector and the corresponding
levers of the DIL switch:
Pin Signal SWITCH
1 +5V 1
2 RxD in (RS-232) --
3 TxD out (RS-232) --
4 P_MIN out (TTL) 5
5 GND --
6 (reserved) --
7 P_SEC out (RS-232) 3
8 P_SEC out (TTL) 4
9 (reserved) --
The signals which have no lever of the DIL switch assigned are hard wired to the pins
of the connector. All levers of the DIL switch which are not listed in the table are
reserved and should remain in the
OFF
position.
Installing the PCI510 in your computer
Every PCI board is a plug&play board. After power-up, the computer's BIOS assigns
resources like I/O ports and interrupt lines to the board, the user does not need to take
care of the assignments. The programs shipped with the board retrieve the settings
from the BIOS.
The computer has to be turned off and its case must be opened. The radio clock can
be installed in any PCI slot not used yet. The rear plane must be removed before the
board can be plugged in carefully. The computer´s case should be closed again and the
antenna connected to the PCI510´s coaxial plug at its rear.