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