Specifications are subject to change without notice 1
Current and Voltage Contr ols
Product Description
1-phase AC or DC plug-in
current metering relay. Often
used in applications where
small loads have to be moni-
Ordering Key
Housing
Function
Output
Type
Power supply
Measuring range
• 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
Type Selection
Plug Output Measuring ranges Supply: 24 VAC Supply: 115 VAC Supply: 230 VAC Supply: 24 VDC
DC-measuring
Circular SPDT 0.2 - 1 mADC SJ 105 024 1mA SJ 105 115 1mA SJ 105 230 1mA SJ 105 724 1mA
4 - 20 mADC SJ 105 024 20mA SJ 105 115 20mA SJ 105 230 20mA SJ 105 724 20mA
20 - 100 mADC SJ 105 024 100mA SJ 105 115 100mA SJ 105 230 100mA SJ 105 724 100mA
100 - 500 mADC SJ 105 024 500mA SJ 105 115 500mA SJ 105 230 500mA SJ 105 724 500mA
0.4 - 2 ADC SJ 105 024 2A SJ 105 115 2A SJ 105 230 2A SJ 105 724 2A
1 - 5 ADC SJ 105 024 5A SJ 105 115 5A SJ 105 230 5A SJ 105 724 5A
AC-measuring
Circular SPDT 0.2 - 1 mAAC SJ 155 024 1mA SJ 155 115 1mA SJ 155 230 1mA SJ 155 724 1mA
4 - 20 mAAC SJ 155 024 20mA SJ 155 115 20mA SJ 155 230 20mA SJ 155 724 20mA
20 - 100 mAAC SJ 155 024 100mA SJ 155 115 100mA SJ 155 230 100mA SJ 155 724 100mA
100 - 500 mAAC SJ 155 024 500mA SJ 155 115 500mA SJ 155 230 500mA SJ 155 724 500mA
0.4 - 2 AAC SJ 155 024 2A SJ 155 115 2A SJ 155 230 2A SJ 155 724 2A
1 - 5 AAC SJ 155 024 5A SJ 155 115 5A SJ 155 230 5A SJ 155 724 5A
tored. Owing to the built-in
latch function, the ON-posi-
tion of the output relay can be
maintained.
Input
Pin 5 & 7
AC/DC current, pin 5 pos. at DC
Measuring ranges
Types (Max. cont.) Ranges Internal
resist.
SJ 1.5 ... 1mA (10mA) 0.2 - 1 mA 100 Ω
SJ 1.5 ... 20mA (100mA) 4 - 20 mA 5.1 Ω
SJ 1.5 ... 100mA (500mA) 20 - 100 mA 1 Ω
SJ 1.5 ... 500mA (2A) 100 - 500 mA 0.2 Ω
SJ 1.5 ... 2A (6A) 0.4 - 2 A 0.05 Ω
SJ 1.5 ... 5A (10A) 1 - 5 A 0.02 Ω
SJ 155: The ranges equal
rms-value of a sinusoidal
current
Max. overload current≤2 A: 8 x I nom (30 sec.)
5 A: 40 A (10 sec.)
25 A (30 sec.)
Latching Interconnect pins 8 & 9
latching at set level
1-Phase AC/DC Current Contr ol
Types SJ 105, SJ 155
Input Specifications
Output SPDT relay
Rated insulation voltage 250 VAC (rms)
(cont./elect.)
Contact ratings (AgCdO) µ (micro gap)
Resistive loads AC 1 10 A/250 VAC (2500 VA)
DC 1 1 A/250 VDC (250 W)
or 10 A/25 VDC (250 W)
Small inductive loadsAC 15 2.5 A/230 VAC
DC 13 5 A/24 VDC
Mechanical life ≥30 x 106operations
Electrical life AC 1 ≥2.5 x 105operations
(at max. load)
Operating frequency ≤7200 operations/h
Dielectric strength
Dielectric voltage
≥2 kVAC (rms) (cont./elect.)
Rated impulse withstand volt. 4 kV (1.2/50 µs) (cont./elect.)
(IEC 60664)
Output Specifications
SJ 105 024 1mA
2Specifications are subject to change without notice
Wiring Diagrams
Example 1 Example 2
Power supply
SJ 105, SJ 155
Load Load
Power supply
SJ 105, SJ 155 PE = Pin 7
Latch
SJ 105, SJ 155
Power supply AC types
Overvoltage cat. III (IEC 60664)
Rated operational voltage (IEC 60038)
Through pins 2 & 10 024 24 VAC ± 15%, 45 to 65 Hz
115 115 VAC ± 15%, 45 to 65 Hz
230 230 VAC ± 15%, 45 to 65 Hz
Voltage interruption ≤40 ms
Dielectric voltage 2 kVAC (rms) (supply/elect.)
Rated impulse withstand volt. 4 kV (1.2/50 µs) (line/neu-
tral, line/line), no direct con-
nection to electronics
Power supply DC types
Overvoltage cat. III (IEC 60664)
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
Mode of Operation
Reaction time Relay operates: τ= 22 ms
Relay releases: τ= 2.2 s,
worst case reaction time
may be up to 5 x τ
Accuracy
Input 0 to +10% on max.
Min. actual level
≤min. set level
Indication for
Output ON LED, yellow
Environment (IEC 60947-1)
Degree of protection IP 20 B (IEC 60529)
Pollution degree 2 (IEC 60664)
Operating temperature -2 0° to +50° C (-4° to +122°F)
Storage temperature - 50 °to + 8 5 ° C ( - 5 8 °to +185°F)
Weight AC supply 200 g
DC supply 125 g
Approvals UL, CSA
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 dr op-
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.
Supply Specifications General Specifications
Specifications are subject to change without notice 3
SJ 105, SJ 155
Sockets◊S 411
Hold down spring◊HF
Mounting rack SM 13
Socket covers BB 4
Front mounting bezel FRS 2
Potentiometer lock PL 1
For further information refer to "Accessories".
AccessoriesRange Setting
Range setting
Relay set point adjustable on
absolute scale.
Hysteresis
Approx. 10%.
The hysteresis may be exten-
ded to 75% by connecting a
resistor between pins 8 and
9. Resistor limits are 470 kΩ
and 3 kΩ(0.25 W). The hys-
teresis is increased by de-
creasing r esistance.
Operation Diagrams
Example 1
Power supply
Set value
Input voltage pins 5 & 7
Relay ON
Example 2
Power supply
Latching
Set value
Input voltage pins 5 & 7
Relay ON
