Level Sensors
Amplifier, Conductive
Types SV 120/220, SV 125/225 (Charging)
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Level control for conductive liquids
Max.-min. control of CHARGING
SV 120/220: Fixed sensitivity
SV 125/225: Adjustable sensitivity
10 A SPDT or 8 A DPDT output relay
LED-indications: Power supply and relay on
AC or DC power supply
SV 120/220
SV 125/225
Product Description
Level control relay for con-
ductive liquids which can
control two levels of charg-
ing. Usable for one level
detection with pin 5 and 7
short-circuited.
Ordering Key
Housing
Output
Power supply
SV 120 230
Type Selection
Plug
Circular
Output
SPDT
DP DT
SPDT
DPDT
Supply: 24 VAC
SV
SV
SV
SV
120
220
125
225
024
024
024
024
Supply: 115 VAC
SV
SV
SV
SV
120
220
125
225
115
115
115
115
Supply: 230 VAC
SV
SV
SV
SV
120
220
125
225
230
230
230
230
Supply: 24 VDC
SV
SV
SV
SV
120
220
125
225
724
724
724
724
Input Specifications
Level probe supply
Level probe current
Sensitivity
SV120/SV220
SV125/SV225
Max. 24 VAC
Max. 2.5 mA
ON
OFF
ON
OFF
From 25 to 50 kΩ
From 15 to 37 kΩ
From 3-11 to 35-55 kΩ (adj.)
From 1-5 to 20-30 kΩ (adj.)
Supply Specifications
Power supply
AC types
Rated operational voltage
through pins 2 and 10 230
115
024
Rated insulation voltage
Rated impulse withstand volt.
Power supply
DC types
Rated operational voltage
724
Rated insulation voltage
Rated impulse withstand volt.
Overvoltage cat. II (IEC 60664)
230 VAC ± 15%
50/60 Hz, -5/+5 Hz
115 VAC ± 15%
50/60 Hz, -5/+5 Hz
24 VAC ± 15%
50/60 Hz, -5/+5 Hz
250 VAC (rms)
4 kV (1.2/50 µs) (line/neutral)
Overvoltage cat. II (IEC 60664)
24 VDC ± 15% (pin 2 pos.)
None
800 V (1.2/50 µs)
General Specifications
Indication for
Power supply ON
Output ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Approvals
CE-marking
LED, green
LED, red (724 only red)
IP 20 B
3 (IEC 60664)
-20 to +50ºC (-4 to +122ºF)
-50 to +85ºC (-58 to +185ºF)
UL, CSA
Yes
Specifications are subject to change without notice (25.06.99)
1
SV 120/220, SV 125/225
Output Specifications
SV120/SV125
Output
Rated insulation voltage
Contact ratings
(Ag-CdO)
Resistive loads
Small inductive loads
Mechanical life
Electrical life
Operation frequency
Insulation voltages
Rated insulation voltage
Rated impulse withstand voltage
SPDT relay
250 VAC (rms)
(cont./elec.)
µ (micro gap)
10 A/250 VAC (2500 VAC)
1 A/250 VAC (250 W)
10 A/25 VDC (250 W)
2.5 A/230 VAC
5 A/24 VDC
≥
5 x 10
7
operations
≥10
5
operations
≤
7200 operations/h
≥
2.0 kVAC (rms)
(cont./elect.)
None
4 kV (1.2/50 µs)
(cont./elect.) (IEC 60664)
800 V
SV220/SV225
DPDT relay
250 VAC (rms)
(cont./elec., cont./cont.)
µ (micro gap)
8 A/250 VAC (200 VA)
0,4 A/250 VDC (100 W)
4 A/25 VDC (100 W)
2.5 A/230 VAC
5 A/24 VDC
≥
5 x 10
7
operations
≥10
5
operations
≤
7200 operations/h
≥
2.0 kVAC (rms)
(cont./elect.)
None
4 kV (1.2/50 µs)
(cont./elect.) (IEC 60664)
800 V
AC 1
DC 1
or
AC 15
DC 13
AC
DC
AC
DC
Mode of Operation
Max. and min. control of
charging.
Example 1
The diagram shows the level
control connected as max.
and min. control, i.e. detec-
tion of 2 levels. The relay
releases until the max. elec-
trode is in contact with the li-
quid. The relay operates
when the min. electrode is no
longer in contact with the li-
quid. By use of a container of
a conductive material (pin 7)
can be connected to the con-
tainer. If the container is made
of a non-conductive material,
an additional electrode is
needed, indicated by the dot-
ted line in the diagram.
Example 2
If only one level is required,
pins 5 and 7 must be inter-
connected to select either
max. or min. control.
Wiring Diagrams
SV 1xx/SV 2xx, two levels
Example 1
SV 1xx/SV 2xx, one level
Example 2
Max.
Min.
Power Supply
Power Supply
Max. or Min.
Operation Diagram
Power supply
Max. electrode in liquid
Min. electrode in liquid
Relay on
Accessories
Conductive level probe:
VH..., VPC..., VPP...
VN..., VNY..., VNI...
VT..., VTI..., VS...
1 or 2 electrodes
2
Specifications are subject to change without notice (25.06.99)
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