Current and Voltage Controls
1-Phase AC/DC Current Control
Types SJ 105, SJ 155
• Current control relay with absolute scale
and internal shunt
• Measuring ranges:
SJ 105: 0.2 - 5 ADC
SJ 155: 0.2 - 5 AAC
• Knob-adjustable current level
• Latching at set level possible
• Output: 10 A SPDT relay
• Plug-in type module
• S-housing
• LED-indication for output ON
• AC or DC power supply
Product Description
1-phase AC or DC plug-in
current metering relay. Often
used in applications where
small loads have to be moni-
tored. Owing to the built-in
latch function, the ON-posi-
tion of the output relay can be
maintained.
Ordering Key
Housing
Function
Output
Type
Power supply
Measuring range
SJ 105 024 1mA
Type Selection
Plug
Output
Measuring ranges Supply: 24 VAC
0.2 - 1 mADC
4 - 20 mADC
20 - 100 mADC
100 - 500 mADC
0.4 - 2 ADC
1 - 5 ADC
0.2 - 1 mAAC
4 - 20 mAAC
20 - 100 mAAC
100 - 500 mAAC
0.4 - 2 AAC
1 - 5 AAC
SJ 105 024 1mA
SJ 105 024 20mA
SJ 105 024 100mA
SJ 105 024 500mA
SJ 105 024 2A
SJ 105 024 5A
SJ 155 024 1mA
SJ 155 024 20mA
SJ 155 024 100mA
SJ 155 024 500mA
SJ 155 024 2A
SJ 155 024 5A
Supply: 115 VAC
SJ 105 115 1mA
SJ 105 115 20mA
SJ 105 115 100mA
SJ 105 115 500mA
SJ 105 115 2A
SJ 105 115 5A
SJ 155 115 1mA
SJ 155 115 20mA
SJ 155 115 100mA
SJ 155 115 500mA
SJ 155 115 2A
SJ 155 115 5A
Supply: 230 VAC
SJ 105 230 1mA
SJ 105 230 20mA
SJ 105 230 100mA
SJ 105 230 500mA
SJ 105 230 2A
SJ 105 230 5A
SJ 155 230 1mA
SJ 155 230 20mA
SJ 155 230 100mA
SJ 155 230 500mA
SJ 155 230 2A
SJ 155 230 5A
Supply: 24 VDC
SJ 105 724 1mA
SJ 105 724 20mA
SJ 105 724 100mA
SJ 105 724 500mA
SJ 105 724 2A
SJ 105 724 5A
SJ 155 724 1mA
SJ 155 724 20mA
SJ 155 724 100mA
SJ 155 724 500mA
SJ 155 724 2A
SJ 155 724 5A
DC-measuring
Circular SPDT
AC-measuring
Circular SPDT
Input Specifications
Input
Pin 5 & 7
Measuring ranges
Types
(Max. cont.)
SJ 1.5 ... 1mA
SJ 1.5 ... 20mA
SJ 1.5 ... 100mA
SJ 1.5 ... 500mA
SJ 1.5 ... 2A
SJ 1.5 ... 5A
(10mA)
(100mA)
(500mA)
(2A)
(6A)
(10A)
AC/DC current, pin 5 pos. at DC
Ranges
Internal
resist.
0.2 - 1 mA
100
Ω
4 - 20 mA
5.1
Ω
20 - 100 mA
1
Ω
100 - 500 mA
0.2
Ω
0.4 - 2 A
0.05
Ω
1-5A
0.02
Ω
SJ 155:
The ranges equal
rms-value of a sinusoidal
current
8 x I
nom
(30 sec.)
40 A (10 sec.)
25 A (30 sec.)
Interconnect pins 8 & 9
latching at set level
Output Specifications
Output
Rated insulation voltage
Contact ratings
(AgCdO)
Resistive loads
AC 1
DC 1
or
Small inductive loads AC 15
DC 13
Mechanical life
Electrical life
AC 1
SPDT relay
250 VAC (rms)
(cont./elect.)
µ (micro gap)
10 A/250 VAC (2500 VA)
1 A/250 VDC (250 W)
10 A/25 VDC (250 W)
2.5 A/230 VAC
5 A/24 VDC
≥
30 x 10
6
operations
≥
2.5 x 10
5
operations
(at max. load)
≤
7200 operations/h
Max. overload current
≤
2 A:
5 A:
Latching
Operating frequency
Dielectric strength
≥
2 kVAC (rms) (cont./elect.)
Dielectric voltage
Rated impulse withstand volt. 4 kV (1.2/50 µs) (cont./elect.)
(IEC 60664)
Specifications are subject to change without notice
1
SJ 105, SJ 155
Supply Specifications
Overvoltage cat. III (IEC 60664)
(IEC 60038)
24 VAC ± 15%, 45 to 65 Hz
115 VAC ± 15%, 45 to 65 Hz
230 VAC ± 15%, 45 to 65 Hz
≤
40 ms
2 kVAC (rms) (supply/elect.)
4 kV (1.2/50 µs) (line/neu-
tral, line/line), no direct con-
nection to electronics
Overvoltage cat. III (IEC 60664)
Power supply DC types
Rated operational voltage
(IEC 60038)
Through pins 2 & 10 724
24 VDC ± 15%
Dielectric voltage
None (supply/elect.)
Rated impulse withstand volt. 800 V (1.2/50 µs)
Rated operational power
AC supply
2.5 VA
DC supply
1.5 W
Power supply AC types
Rated operational voltage
Through pins 2 & 10
024
115
230
Voltage interruption
Dielectric voltage
Rated impulse withstand volt.
General Specifications
Reaction time
Relay operates:
τ
= 22 ms
Relay releases:
τ
= 2.2 s,
worst case reaction time
may be up to 5 x
τ
0 to +10% on max.
Min. actual level
≤
min. set level
LED, yellow
(IEC 60947-1)
IP 20 B (IEC 60529)
2 (IEC 60664)
-20° to +50°C (-4° to +122°F)
-50° to +85°C (-58° to +185°F)
200 g
125 g
UL, CSA
Accuracy
Input
Indication for
Output ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Weight
AC supply
DC supply
Approvals
Mode of Operation
SJ 105
Example 1
DC current metering
The relay operates when the
measured current value ex-
ceeds set point. The relay re-
leases when the current
drops 10% below set point
(see hysteresis) or when sup-
ply voltage is interrupted.
Example 2
DC current metering
- latching
The SJ 105 operates when
the measured current value
exceeds set point. The relay
releases when removing latch
between pins 8 and 9 provi-
ded that the current has drop-
ped at least 10% below set
point (see hysteresis) or by
interrupting supply voltage.
SJ 155
The relay measures the aver-
age of a sinusoidal current.
The set point, calibrated in
rms-value, is set on the built-
in potentiometer.
Example 1
AC current metering
The relay operates when the
measured current value ex-
ceeds set point. The relay re-
leases when the current
drops 10% below set point
(see hysteresis) or when sup-
ply voltage is interrupted.
Example 2
AC current metering
- latching
The SJ 155 operates when
the measured current value
exceeds set point. The relay
releases when removing latch
between pins 8 and 9 pro-
vided that the current has
dropped at least 10% below
set point (see hysteresis) or
by interrupting supply volt-
age.
Note:
At DC supply: Do not connect
pin 7 with pin 10 as these
pins are internally connected
by a resistor of 3.9 kΩ. No
current is to pass through this
internal connection.
Wiring Diagrams
Example 1
Load
Load
Latch
Example 2
Power supply
SJ 105, SJ 155
Power supply
SJ 105, SJ 155
PE = Pin 7
2
Specifications are subject to change without notice
Test/Measurement
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