Lambrecht rain[e]observer, Руководство по эксплуатации

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rain[e]observer Operating Instructions
Operating Instructions
rain[e]observer Precipitation Measuring System
8 Connecting cables for rain[e] precipitation sensor and heating
To connect the rain[e] to a data collection device such as the PreLOG data logger, you require a connection
cable with an M12 plug (ID no. 32.15184.060000). To power the heating you need a power cable (ID no.
32.15184.061000 or 32.15184.061010).
Connection cable for the sensor, 8-pin, M12 plug, length: 10 m 32.15184.060000
Connection cable for the heating, length: 1 m 32.15184.061000
Connection cable for the heating, length: 10 m 32.15184.061010
You should ensure that the external power connection for the heating is connected first – before
the clamping plug for the heating in the device and the sensor connection. Otherwise the heating
will be switched off during the automatic heating check.
The maximum possible distance between the rain[e] and the data collection device depends on the interface used.
• SDI-12 65...100 m, unshielded, low voltage cable
• RS485 1,000 m,
• Pulse output 1,000 m.
You can find further details of the respective cable lengths in the corresponding SDI-12 and RS485 standards.
If you use a power cable longer than the 1 m long cable we recommend to sup-
ply the heating, this formula gives you information about the actual power P
a
at the nominal voltage U
N
= 24 VDC, the nominal power P
N
= 140 W, the specific
electrical resistance ρ = 0.017 Ωmm²/m for copper , the length of the cable l and the
cross-sectional area of cable A .
The actual output should be P
a
> 125 W in order to guarantee sufficient heating performance.
The USB cables for connections to the service interface (inside the rain[e] ) should be no longer than 3 m.
Applies to rain[e]H : P
a
> 125 W and P
N
= 140 W; applies to rain[e]400H and rain[e]314H : P
a
> 187 W and P
N
= 210 W
2
2
4
2






+
=
A
l
P
U
P
U
P
N
N
N
N
a
ρ
6