ABB AC 800F

8 Accessories
8-15
8.3 Connecting the radio clock to the AC 800F
8.3.1 DCF77 radio clock
An external Hopf (manufacturer) DCF77 radio clock, which is installed in a separate
rack (19" wide, or smaller), can be connected to the AC 800F. The clock works with
an external antenna (indoor or outdoor, as required), which is linked with the clock by
a coax. cable. The radio clock is connected to the AC 800F through the diagnostic
interface Diag of the power supply module.
The radio clock receives a standard time signal from the PTB (Physikalisch-
Technische Bundesanstalt = Federal German Institute of Physics and Technology). A
long-wave transmitter station near Frankfurt/Main transmits this signal. Under normal
conditions this signal can be received in an area with a radius of approximately 1500
km from this point.
If you need a standard time signal which can be received outside Germany, please
use the GPS satellite radio clock. For details refer to Section 8.4.6.
The time synchronization is system-wide. Thus, only one radio clock per system is
needed. The time of all process and operator stations connected to a system bus is
set by the radio clock. If several systems are connected to a system bus, one radio
clock synchronizes the times of all process and operator stations connected to the
system bus.
8.3.2 Radio clock deliverables
Normally, the components listed below are needed for using a radio clock with the
AC 800F.
Qty.
Component
1
Order code
1
1 Radio clock board 6855 with power supply and frame FG 685511
1 19“ case, 3 height units, 84 part units GE 7000
1 Indoor antenna type 4436 with wall-mount and 10 m cable FG 443600
Note that the component names and order codes may have changed.
Please contact Hopf for details.
1
Hopf Elektronik GmbH, Abt. Industrieelektronik - Nottebohmstr. 41 - D-58511 Lüdenscheid
Phone + 49 23 51 / 93 86 86 - Fax: + 49 23 51 / 93 86 93 - http://www.hopf-time.com/