Specifications are subject to change without notice (25.06.99)
1
Level Sensors
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
Product Description
Ordering Key
SV 120 230
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.
Housing
Output
Power supply
Type Selection
Plug
Output
Supply: 24 VAC
Supply: 115 VAC
Supply: 230 VAC
Supply: 24 VDC
Circular
SPDT
SV 120 024
SV 120 115
SV 120 230
SV 120 724
DP DT
SV 220 024
SV 220 115
SV 220 230
SV 220 724
SPDT
SV 125 024
SV 125 115
SV 125 230
SV 125 724
DPDT
SV 225 024
SV 225 115
SV 225 230
SV 225 724
Amplifier, Conductive
Types SV 120/220, SV 125/225 (Charging)
Input Specifications
Level probe supply
Max. 24 VAC
Level probe current
Max. 2.5 mA
Sensitivity
SV120/SV220
ON
From 25 to 50 k
OFF
From 15 to 37 k
SV125/SV225
ON
From 3-11 to 35-55 k
(adj.)
OFF From
1-5 to 20-30 k
(adj.)
Supply Specifications
General Specifications
Power supply
AC types
Overvoltage cat. II (IEC 60664)
Rated operational voltage
through pins 2 and 10 230
230 VAC 15%
50/60 Hz, -5/+5 Hz
115
115 VAC 15%
50/60 Hz, -5/+5 Hz
024
24 VAC 15%
50/60 Hz, -5/+5 Hz
Rated insulation voltage
250 VAC (rms)
Rated impulse withstand volt.
4 kV (1.2/50 s) (line/neutral)
Power supply
DC types
Overvoltage cat. II (IEC 60664)
Rated operational voltage
724
24 VDC 15% (pin 2 pos.)
Rated insulation voltage
None
Rated impulse withstand volt.
800 V (1.2/50 s)
Indication for
Power supply ON
LED, green
Output ON
LED, red (724 only red)
Environment
Degree of protection
IP 20 B
Pollution degree
3 (IEC 60664)
Operating temperature
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
Approvals
UL, CSA
CE-marking
Yes
SV 120/220
SV 125/225
2
Specifications are subject to change without notice (25.06.99)
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 120/220, SV 125/225
SV 1xx/SV 2xx, one level
Example 2
Power Supply
Min.
Max.
Max. or Min.
Power Supply
Output Specifications
SV120/SV125
SV220/SV225
Output
SPDT relay
DPDT relay
Rated insulation voltage
250 VAC (rms)
250 VAC (rms)
(cont./elec.)
(cont./elec., cont./cont.)
Contact ratings (Ag-CdO)
(micro gap)
(micro gap)
Resistive loads
AC 1
10 A/250 VAC (2500 VAC)
8 A/250 VAC (200 VA)
DC 1
1 A/250 VAC (250 W)
0,4 A/250 VDC (100 W)
or
10 A/25 VDC (250 W)
4 A/25 VDC (100 W)
Small inductive loads
AC 15
2.5 A/230 VAC
2.5 A/230 VAC
DC 13
5 A/24 VDC
5 A/24 VDC
Mechanical life
5 x 10
7
operations
5 x 10
7
operations
Electrical life
10
5
operations
10
5
operations
Operation frequency
7200 operations/h
7200 operations/h
Insulation voltages
Rated insulation voltage
AC
2.0 kVAC (rms)
2.0 kVAC (rms)
(cont./elect.)
(cont./elect.)
DC
None
None
Rated impulse withstand voltage
AC
4 kV (1.2/50 s)
4 kV (1.2/50 s)
(cont./elect.) (IEC 60664)
(cont./elect.) (IEC 60664)
DC
800 V
800 V
Operation Diagram
Power supply
Max. electrode in liquid
Min. electrode in liquid
Relay on
Accessories
Conductive level probe:
1 or 2 electrodes
VH..., VPC..., VPP...
VN..., VNY..., VNI...
VT..., VTI..., VS...
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