Meinberg UA509P, Operating Instructions Manual

Page: 6 / 30

6
UA509P
The radio remote clock UA509P has been designed for applications where two
independent serial interfaces and up to four free programmable relay outputs are
needed. The clock also offers the possibility to control slave clocks via seperate slave
clock drivers. The rear connector pin assignment is compatible with the former clock
UA537P to replace this clock in the future. The UA509P contains a new flash EPROM
with bootstrap loader that allows to upload a new firmware via the serial interface
without removal of the clock.
Installation
Power Supply
The System requests a single supply voltage of +5V/260mA. The power supply should
be longitudinal regulated. If a switched mode power supply is used the negative pole is
to ground directly or via a capacitor >0,1F. The voltage feed should be applied low
impedance and via the pins z, b and d.
Mounting the Antenna
Generally it is important to position the antenna in an optimal way. The antenna
should be aligned at a right angle to the direction of the transmitter (Frankfurt). It
should be mounted at least 30 centimeters away from the clock unit and from solid
steel. A distance of several meters is recommended to all TVs or computer monitors.
The scope of supply includes an active ferrite antenna for indoor mounting (AI01)
and 5m of RG174 coaxial cable. When mounting the antenna outdoor the weather
proof Antenna AW02 is to use.
Powering Up the System
After connecting the power supply and the antenna the system is ready to operate.
Time, date and the relay conditions are displayed on the LC display (the timebase
choosen for COM0 is displayed).
The brighness of the “Feld” LED in the front panel depends on the signal strength of
the DCF77 carrier. In order to get the maximum signal, the antenna should be aligned
in two steps. First it should be turned slowly until the “Feld” LED is mostly dimmed.
Finally the antenna must be turned by 90° from this position to obtain maximum