Connecting the Nivocompact
with Electronic Insert EC 22
(Three-Wire PNP) or
Electronic Insert EC 23
(Three-Wire NPN)
for DC Voltage
Transistor circuit for load
The load connected to Terminal 3 is
switched by a transistor, contactless
and therefore without bouncing.
EC 22:
Terminal 3 has a positive signal
with normal switching.
EC 23:
Terminal 3 has a negative signal
with normal switching.
The transistor is blocked on level alarm
or with a power failure.
Protection against voltage peaks
Connecting to an instrument with a high
inductance:
a voltage limiter should be connected.
Connecting the Nivocompact
with Electronic Insert EC 24
(Relay Output)
for DC and AC Voltages
Relay contact for load
The load is connected over a
potential-free relay contact
(change-over contact).
The relay contact breaks the connection
between Terminal 3 and Terminal 4 on
level alarm or with a power failure.
Protection against voltage peaks and
short-circuiting
Protect the relay contact by connecting
a spark barrier to instruments with high
inductance.
A fine-wire fuse (load-dependent) can
protect the relay contact if a short-circuit
occurs.
Power Supply
TI133Y15
(+)
1
3
M
E
R
F
L+
L-
U=: 10 V...55 V
2
(PE)
EC 22
+
TI133Y16
(–)
EC 23
1
3
M
E
R
F
L+
L-
U=: 10 V
…
55 V
2
(PE)
TI133Y17
EC 24
1
3
M
E
U
∼
or
U=
Potential-free
change over
contact
L1
N
U
∼
: 21 V
…
250 V
or
u=: 20 V
…
200 V
4
5
2
F
1
F
2
a
u
r
+
–
PE
Connecting the
Nivocompact with
electronic insert EC 23
NPN connection
F: Fine-wire fuse,
load-dependent
R: Connected load,
e.g. PLC, PCS,
relay
M: Ground connection
to silo or to counter
electrode
E: Grounding
Connecting the
Nivocompact with
electronic insert EC 24
Relay output
F1: Fine-wire fuse
200 mA, semi-time
lag recommended
F2: Fine-wire fuse to
protect the relay
contact, load-
dependent
M: Ground connection
to silo or to counter
electrode
E: Grounding
Connecting the
Nivocompact with
electronic insert EC 22
PNP connection
F: Fine-wire fuse,
load-dependent
R: Connected load,
e.g. PLC, PCS,
relay
M: Ground connection
to silo or to counter
electrode
E: Grounding
Connecting the
EC 22, EC 23
Connecting the EC 24
10
