Current and Voltage Controls
1-Phase DC Current Control
Type SJ 115
• DC current control relay with absolute
mV-scale for use with external standard shunt
• Scale indication in absolute mV scale,
measuring range: 10 - 150 mV
• Knob-adjustable voltage 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
DC plug-in current metering
relay. Measures the voltage
of an externally connected
standard shunt. Often used
with the built-in latch func-
tion to indicate where a DC
load exceeds set point.
Ordering Key
Housing
Function
Output
Type
Power supply
Measuring range
SJ 115 024 50mV
Type Selection
Plug
Circ.
Output
SPDT
Measuring ranges Supply: 24 VAC
10 - 50 mV
12 - 60 mV
20 - 100 mV
30 - 150 mV
SJ 115 024 50mV
SJ 115 024 60mV
SJ 115 024 100mV
SJ 115 024 150mV
Supply: 115 VAC
SJ 115 115 50mV
SJ 115 115 60mV
SJ 115 115 100mV
SJ 115 115 150mV
Supply: 230 VAC
SJ 115 230 50mV
SJ 115 230 60mV
SJ 115 230 100mV
SJ 115 230 150mV
Supply: 24 VDC
SJ 115 724 50mV
SJ 115 724 60mV
SJ 115 724 100mV
SJ 115 724 150mV
Input Specifications
Input
Pin 5
Pin 7
Measuring ranges
Types
SJ 115 ... 50mV
SJ 115 ... 60mV
SJ 115 ... 100mV
SJ 115 ... 150mV
Latching
+ DC voltage
- DC voltage
Internal Max.
resist. voltage
10 - 50 mV 3
Ω
1V
12 - 60 mV 3
Ω
1V
20 - 100 mV 7.5
Ω
2V
30 - 150 mV 7.5
Ω
2V
Interconnect pins 8 & 9
latching at set level
Ranges
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/neutral,
line/line), no direct connec-
tion 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
Power supply AC types
Rated operational voltage
Through pins 2 & 10 024
115
230
Voltage interruption
Dielectric voltage
Rated impulse withstand volt.
Specifications are subject to change without notice
1
SJ 115
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
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
Operating frequency
Dielectric strength
Dielectric voltage
≥
2.0 kVAC (rms) (cont./elect.)
Rated impulse withstand volt. 4 kV (1.2/50 µs) (cont./elect.)
(IEC 60664)
Indication for
Output ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Weight
AC supply
DC supply
Approvals
Mode of Operation
Example 1
DC current metering
The relay operates when the
measured voltage across the
external shunt exceeds set
point. The relay releases
when the registered value
drops 10% below set point
(hysteresis) or when power
supply is interrupted.
Example 2
DC current metering
- latching
The relay operates when the
measured voltage across the
external shunt exceeds set
point. Provided the value has
dropped at least 10% below
set point (see hysteresis), the
relay releases by removing
the latch between pins 8 and
9 or by interrupting power
supply.
Note:
Internal connection between
pins 7 and 10 at DC power
supply. No current is to pass
through this internal connec-
tion.
Wiring Diagrams
Example 1
Shunt
Load
Load
Latch
Example 2
Shunt
Power supply
SJ 115
Power supply
SJ 115
PE = Pin 7
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 kΩ
and 3 kΩ (0.25 W). The hys-
teresis is increased by de-
creasing resistance.
Accessories
Sockets◊
Hold down spring◊
Mounting rack
Socket covers
Front mounting bezel
Potentiometer lock
S 411
HF
SM 13
BB 4
FRS 2
PL 1
For further information refer to "Accessories".
2
Specifications are subject to change without notice
Power technology
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