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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
Level Monitors
Level-Relays NS20 can be used
for monitoring 1 level and as MIN/
MAX-Control.
3 elektrodes for MIN/MAX-
control
2 elektrodes (E2 open) as
level-monitor
Sensitivity adjustable
5 kΩ...250 kΩ
LED for state of relay
Function of relay reversible
(picks up or releases at top
electrode)
Switching-delay adjustable
0,1 ... 10 s
Application as level-monitor:
Protection from running dry or
overflow, seal-monitoring of
submersible pumps for leaks,
detection of leaks.
Application Min/Max: Controlling
a level between minimum (elek-
trode E2) and maximum (E3). As
long as E3 is dry, a magnetic valve
is opened (or a pump is running)
and liquid is inuenting. As soon
as maximum (E3) is reached, the
NS 20 closes the valve. When
the level falls below E2, the cycle
starts new.
In reverse also discharging of a
container can be controlled.
Level Monitor Type NS20K
1 Level and MIN / MAX-Control
Supply voltage Us
Relay
Contact
Switching delay
Test conditions
Rated ambient temperature
range
Number of electrodes
Voltage at electrodes
Line capacity at 5 kΩ
at 150 kΩ
at 250 kΩ
Dimensions (h x w x d) mm
Attachment
Protection housing/terminals
Weight
AC/DC 24-240 V, 0/50/60 Hz, <2W, <3VA
(DC 20,4-297 V, AC 20-264 V)
1 change-over-contact (co)
type 2 see "general technical information"
adjustable 0,1...10 s
see "general technical information"
-20°C...+55°C
2 or 3 (with 2 electrodes: E2 not connected)
< AC 6 V
e
max. 500 nF = app. 2500 m
max. 20 nF = app. 100 m
max. 10 nF = app. 50 m
Design K: 75 x 22,5 x 115 mm
on 35 mm DIN-rail or screws M4
IP 30/ IP 20
approx. 100 g
Technical Data
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Überwachung Flüssigkeitsstand mit 1 Elektrode (E3 benetzt, Relais an
15-18 geschlossen)
monitoring of liquid with 1 electrode (E3 dipped, relay on 15-18 closed)
1 Elektrode / electrode
2 Flüssigkeitsbehälter / tank
3 Magnetventil / magnetic valve
4 Bezugselektrode / basic electrode
Zulaufsteuerung mit 2 Elektroden (E3 benetzt, Relais aus 15-16 geschlossen)
lling tank with 2 electrodes (E3 dipped, relay o 15-16 closed)
1 Elektrode / electrode
2 Flüssigkeitsbehälter / tank
3 Magnetventil / magnetic valve
4 Bezugselektrode / basic electrode
2015-09-01
NS20K
Part number: V223445
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