ABB FW/S 4.5 Bedienungsanleitung Seite 41

A. Operation without DCF 77 radio reception
1. Connect the bus line only.
2. In this case, set the summer/winter change to the correct changeover
standard, see Chapter 5.3/5.4.
B. FW/S connection with radio reception
1. First connect the radio time switch FW/S 4.5 to the 230 V mains supply and
then to the bus line.
2. Connect only antenna with the order no. FA/A 1.1 to the time switch. In this
case, the polarity of the connection is immaterial. The antenna signal is
safety extra-low voltage.
Ensure that there is safe isolation from the voltage supply.
C. Adjusting the DCF radio antenna FA/A 1.1
1. Set the radio antenna so that the
LED installed in the front flashes
at one second intervals.
FW/S 4.5
DCF77-connection
D. Connecting several FW/S 4.5 radio time switches to the
DCF antenna
fig. D
1. First, connect only one FW/S 4.5 time switch to the 230 V mains supply,
then connect to the bus line.
Observe the following when connecting the antenna:
2. Only after this, connect further FW/S 4.5 devices to the antenna.
6145
The connection to the DCF antenna may take the form of a star, bus or tree
topology, see Fig. D).
Note: If an LED at the DCF lights up, simply reverse the polarity at this
Frankfurt
connection!
3. Following this, connect the other devices first to the 230 V mains supply
and then to the bus line.
4. Align the antenna, see Chapter C.
39
FW/S 4.5
FW/S 4.5
N
L
L L
+ +
N DCF 77 N DCF 77
LED LED
+
-
DCF77-connection
DCF 77- Busanschluß
Busanschluß