Siemens SINAUT ST7 System Manual page 50

Introduction to the SINAUT ST7 system
1.7 Radio clock components
The adapter cable is supplied with every TIM module with an integrated DCF77 radio clock.
It can also be ordered as a spare part under the number listed in the following table.
Table 1- 4
Order no.
6NH7700-0AD15
In addition to the adapter cable, there is also a selection of antennas.
DCF77 indoor antenna
An indoor antenna can be used in buildings in which there is no source of interference for the
DCF77 signal. It should not be installed in the vicinity of televisions, monitors, thyristor
controls, network cables or fluorescent lights.
DCF77 outdoor antenna for flat roof, wall or mast installation
Whenever possible, a professional radio clock system should use an outdoor antenna. In
contrast to an indoor antenna whose environment can change constantly due to the
technical activity in the building, the conditions for an outdoor antenna are practically
constant. Indirect lightning protection is strongly recommended for an outdoor antenna.
Figure 1-15
The following figure shows the interconnection of the various DCF77 components (the
adapter cable 6NH7700-0AD15 is supplied with each TIM with an integrated DCF77 radio
clock receiver).
50
Adapter cable for a TIM with integrated DCF77 radio clock
Description
Adapter cable for connecting a DCF77 radio
clock integrated in a TIM, to adapt the internal
connector to the external BNC connector.
Cable length 1.5 m
Examples of DCF77 antennas, left an indoor antenna, right an outdoor antenna
Illustration
System Manual, 07/2009, C79000-G8976-C178-07
Station control system