3
(145x6)
METEOROLOGY
Operating
Instructions
Operating Instructions
Wind Sensors METEOROLOGY (145x6)
Attention!
Because the installation take place in a danger-
ous height, the assembly personal must follow the
rules for prevention of accidents.
Example representation:
Cable run by a EMC fair Pg-socket.
The electronics of the...
...
14576 24V, 14566 24V, and 14566 F1000 models is powe-
red via the leads J(-) and H(+) of the 12-pin connector.
The following values are allowed:
Model Voltage
Current
14576-24 V
10...30 V
DC
max. 30 mA
14566-24 V
10...30 V
DC
max. 30 mA
14566 F1000 12 V
DC
max. 30 mA
14576 I ...
...
For the 14576 I model please note the recommended
circuit in the following paragraph.
Note for the 14566 F1000 model
This model uses an
open sliding contact
to convert the wind
vane orientation into an electrical signal. To prevent the slid-
ing contact from being damaged you may have to take into
consideration a pull-up or pull-down resistance of more than
100 k
Ω
.
A voltage or a constant current source can be used to power
the sensor. The maximum specifi c resistance must not ex-
ceed 2
Ω
.
Recommended Circuit for 14576 I
The technical data of the interface between a proximity switch
according to NAMUR and an electronic amplifi er is defi ned by
DIN 19 234 (DIN = Deutsche Industrienorm, German Industry
Standard). The proximity switch is connected using a two-wire
cable (here: wire L(+) and B(-)).
These two wires power the proximity switch and simultane-
ously control the amplifi er via the current consumption that
changes in accordance with the revolutions of the cup an-
emometer.
To ensure a safe interaction between the proximity switch and
the amplifi er, the DIN 19 234 specifi es the following values
for the amplifi er:
1. Power supply for the control circuit
no-load voltage U
0
:
7...9 V
preferred
value
: 8.2
V
short circuit current I
K
:
7...16 mA
preferred
value
: 8.2
mA
2. Current-dependent switching or monitoring points
2 a. Switching point
The
amplifi er switching point must be within a proximity
switch current consumption range of 1.2 mA to 2.1 mA.
2 b. Cable damage monitoring
If the current consumption of the proximity switch falls
below a certain value it is assumed that there is a cable
damage or another error in the proximity switch. The
cable damage monitoring must react within a current
range of 0.05 mA to 0.15 mA.
2 c. Short circuit monitoring
If the current consumption of the proximity switch
exceeds a certain value it is assumed that there is a
short circuit on the cable or a corresponding fault in
the proximity switch. The short circuit monitoring
must react within a current range that corresponds to
a compensating resistance of the proximity switch of
360 to 1000 ohms.
Electrical Connection
All devices of the
meteorology
family of sensors are connected
using a 12 pole connector (pins) embedded in the bottom of
the casing.
Cable Layout
The connecting cable is suitably led along the mast between
the data evaluation device (indicating instrument or data ac-
quisition system) and the sensor. The cable must be fastened
using appropriate cable ties (their length depends on the mast
diameter).
You can also install the entire connecting cable within the
tube elements of the mast if the mast is prepared correspond-
ingly.
Tip: Lead the cable in a wide curve from the mast to the
bottom of the casing so that you can later easily dismount
the cable.
Please make sure the cable is protected from humidity on the
side of the data processing system. Generally, Pg sockets
that use a rubber joint to prevent humidity from penetrating
into the terminal box of the data processing system provide
suffi cient protection.
Output Signal
When you connect the output signal please note the assign-
ment of the wires of the open cable end shown in the internal
circuit diagrams on the following pages.
The individual output wires lead you to the corresponding
connecting terminals of the data acquisition section.
