CLS–23 © Dinel, s.r.o.
9
Fig. 6: Auxiliary electrode in non-conductive tanks
At sensors with the length of electrodes greater than 300 mm it is necessary to use an auxiliary
probe (e.g. conductive probe) when installing from above on non-conductive containers for the
maximum detection reliability. The auxiliary electrode is connected electrically with the housing of
the sensor. The recommended length of the auxiliary electrode and the distance from the sensors
are shown in the picture.
Suitable types of auxiliary electrodes are for example: Dinel CNP–18F–30 probes with an M18
thread or a PDE–18 plate electrode (see Accessories).
max.
min.
E
b
E
E
k
c
d
>5
E
a
Ep
>5
>5
Electrical connection to the
sensor housing
Conductive probe
CNP–18F–30
Non-conductive tank
30
E
30a
EEp
20
E
40b
50
E
10c
40
E
40d
20
E
20k
+≈
>
+≥=
+≥=
+≥=
+≥=
E – Electrode length in mm
30a
EEp
20
E
40b
50
E
10c
40
E
40d
20
E
20k
+≈
max.
min.
E
b
E
E
k
c
d
>5
E
a
Ep
>5
>5
Auxiliary electrode PDE–18
AUXILIARY ELECTRODE IN NON-
-CONDUCTIVE TANKS
FOR TYPE: CLS–23_–20, 21, 30 (for electrode
length up to 300 mm)
For “A” variant with the xed cable, the individual color cores of the connecting cable are connected
to the respective terminals of the related equipment (supply unit).
For “C” variant with the connector, the cable can be supplied with the sensor (length 2 or 5 m),
tted with the pressed connector socket or dismountable connector socket without the cable (see
accessories), the connector is not part of the sensor. In this case the cable is connected to the
inside pins of the socket according to Fig. 10.
The sensor with related equipment is interconnected by a suitable three-core (P variation) or two-
core (S and R variations) cable. The length of the cable for the Xi and XiT variations must be
selected with respect to the maximum permitted parameters (usually inductance and capacity) of
the outside intrinsically safe circuit of supply units (NSSU, NDSU, NLCU). If using a dismountable
connector socket, the outside diameter of the cable is a maximum of 6 mm
Type CLS–23_–_–_–S–_
The positive power terminal +U is con-
nected via a load (e.g. a relay) to the
brown wire, or connector pin no.1, the
negative terminal to the white wire (con-
guration "N" and "NT") or to the blue
wire (conguration "E") or to connector
pin No.3.
+U
0V
BN (1)
WH, BU (3)
Fig. 7: “S“ type sensors connection
(2 - wire electronic switch)
