OTT PLS - Appendix A: Connecting OTT PLS to Dataloggers

Appendix A – Connecting the OTT PLS via SDI-12 or RS-485 interface to an
OTT netDL or OTT DuoSens datalogger
Method A: Connecting the OTT PLS via the SDI-12 interface (protocol and
physical interface: SDI-12). The maximum length of the cable is 100 m.
䡵 Connect the OTT PLS to the OTT netDL IP datalogger or to the OTT DuoSens
C
ompact Datalogger as shown in Figure 9. Also refer to OTT netDL or OTT
DuoSens Operating Instructions.
Method B: Connect OTT PLS using the physical RS-485 interface (SDI-12 protocol
via physical RS-485 interface). The maximum length of the cable is 1,000 m.
䡵 Connect the OTT PLS to the OTT netDL IP datalogger or to the OTT DuoSens
Compact Datalogger as shown in Figure 10. Also refer to OTT netDL or OTT
DuoSens Operating Instructions.
䡵 To achieve better protection against overloads, you can optionally connect the
cable shielding to a grounding point/equipotential busbar.
SDI-12
Input
Pressure probe cable
A
4
31 2
OTT DuoSens
+9.6 … 28 V
GND
SDI-12 Data
SDI-12
Input
C
4
31 2
OTT netDL
+9.6 … 28 V
GND
SDI-12 Data
Fig. 9: Connecting the OTT PLS
to an OTT netDL or OTT DuoSens using
an SDI-12 interface.
The letters above the screw terminal
strips identify the connectivity options avail-
able on the OTT netDL/OTT DuoSens.
RS-485
Input
A
431 2
OTT DuoSens
Pressure probe cable
+9.6 … 28 V
GND
RS-485
Input
C
431 2
OTT netDL
+9.6 … 28 V
GND
RS-485-B RS-485-A
RS-485-B
RS-485-A
Fig. 10: Connecting the OTT PLS to a to an
OTT netDL or OTT DuoSens using an
RS-485 interface (SDI-12 protocol).
The letters above the screw terminal
strips identify the connectivity options avail-
able on the OTT netDL/OTT DuoSens.
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