Specifications are subject to change without notice
1
Current and Voltage Controls
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
SJ 1.5 ... 20mA
(100mA)
4 - 20 mA
5.1
SJ 1.5 ... 100mA
(500mA)
20 - 100 mA
1
SJ 1.5 ... 500mA
(2A)
100 - 500 mA
0.2
SJ 1.5 ... 2A
(6A)
0.4 - 2 A
0.05
SJ 1.5 ... 5A
(10A)
1 - 5 A
0.02
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 Control
Types SJ 105, SJ 155
Input Specifications
Output
SPDT relay
Rated insulation voltage
250 VAC (rms)
(cont./elect.)
Contact ratings (AgCdO)
(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 loads AC 15
2.5 A/230 VAC
DC 13
5 A/24 VDC
Mechanical life
30 x 10
6
operations
Electrical life
AC 1
2.5 x 10
5
operations
(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 s) (cont./elect.)
(IEC 60664)
Output Specifications
SJ 105 024 1mA
2
Specifications 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 s) (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 s)
Rated operational power
AC supply
2.5 VA
DC supply
1.5 W
Mode of Operation
Reaction time
Relay operates:
= 22 ms
Relay releases:
= 2.2 s,
worst case reaction time
may be up to 5 x
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
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
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 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 k
. 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".
Accessories
Range 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 k
and 3 k
(0.25 W). The hys-
teresis is increased by de-
creasing resistance.
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
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