OTT SE 200, Operating Instructions Manual

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5 Connecting the SE 200
The SE 200 contains an SDI-12 interface or a combination SDI-12/4 … 20 mA
interface depending on the conditions of delivery. These interfaces allow one to
connect the SE 200 both to the OTT datalogger and to any datalogger by another
manufacturer that has the correct interfaces. The SDI-12 interface must meet
SDI-12 Standard 1.2 (SDI-12 = Serial-Digital Interface with 1200 baud). The
interfaces of the SE 200 are available on a 4-wire connecting cable.
Note
䊳
Referencing SE 200 measured values to a level zero: Input the contact gauge /
staff gauge measured value, for example using a scaling function of the data-
logger connected to the SE 200. Alternatively: Lift the float cable slightly and
rotate the float pulley until the SE 200 outputs the desired value.
5.1 Connecting the SE 200 to any datalogger using the SDI-12
interface
䡵
Connect the SE 200 to an SDI-12 input of the external datalogger. Follow the
datalogger handbook as you do this. The wire assignments for the SE 200
connecting cable can be seen in Figure 4 (above).
5.2 Connecting the SE 200 to any datalogger using 4 … 20 mA
䡵
Connect the SE 200 to a 4 … 20 mA input of the external datalogger. Follow
the handbook of the datalogger when you do this, as well as Chapter 7 of
these instructions,
determine the maximum load resistance (4 … 20 mA inter-
face)! The wire assignments for the SE 200 connecting cable can be seen in
Figure 4 (below).
yellow SDI-12 Data
SDI-12
gree n SDI-12 GND
white GND
brow n +VCC
(yellow n ot used)
4 … 20 mA
(gree n n ot used)
white V –
brow n V +
Fig. 4: Wire assignment of
the SE 200 connecting cable.
top: Using the SDI-12 bottom interface
bottom: Using the 4 … 20 mA interface
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