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• According to IEC/EN 60 255, DIN VDE 0435-303
• Detection of standstill of rotating machine parts and cyclic pulses
• Detection of blocking or missing pulses
• Monitoring time adjustable between 0.1 ... 20 s (others on request)
• Energized or de-energized on trip
• For input frequency up to 5 kHz( 300000 ipm)
• Universal input, suitable for a variety of sensors
(PNP,NPN,2-wire, contact, voltage)
• Input also suitable for SKF sensor bearings
• As option for Namur sensors
• On request with manual reset
• IK 9144 and SK 9144: compact version for DC 24V auxiliary supply
• IL 9144 and SL 9144: for auxiliary supply up to AC 400V with
galvanic separation to sensor input
• LED indicators for auxiliary supply, sensor pulses and contact
position
• 1 changeover contact (2 changeover on request)
• Devices available in 2 enclosure versions:
IK/IL 9144: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK/SL 9144: depth 98 mm, with terminals at the top for
cabinets with mounting plate and cable duct
• IK 9144, SK 9144: width 17.5 mm
• IL 9144, SL 9144: width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Indication of phase failure in 3-phase systems
• Single phase connection possible
• Independent of phase sequence
• LED indicator for each phase
• Devices available in 2 enclosure versions:
IK 9168: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9168: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Detection of phase failure in 3-phase systems
• Single phase connection possible
• Closed circuit operation
• Independent of phase sequence
• LED indicator for each phase
• Output 1 changeover contact
• Devices available in 2 enclosure versions:
- I- and R-versions, e.g. IK 9169 with depth 61 mm or RK 9169
with depth 71 mm with terminls at the bottom for installation
systems and industrial distribution systems according to DIN 43880
- S-version, e.g. SK 9169: depth 100 mm, with terminals at
the top for cabinets with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Monitoring of overvoltage in 3-phase systems
• Also for single phase
• Without auxiliary supply
• Settable response value
• N.C. circuit operation (optionally N.O. circuit operation)
• Optionally with or without N
• Optionally with delay t1 on trip
• Optionally with delay t2 on reset
• LED indicator for state of output relay
• Indepenent of phase sequence
• 1 changeover contact
• Devices available in 2 enclosure versions:
IK 9170: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9170: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Monitoring of undervoltage in 3-phase system
• Also for single phase
• Without auxiliary supply
• Optionally for 3p3w systems
• LED indicator for state of output relay
• Independent of phase sequence
• 1 or 2 changeover contacts
• Optionally fixed or settable response value
• As option with phase sequence detection
• Optionally with or without N
• Optionally with off-delay t1
• Opionally with on delay t2
• Devices available in 2 enclosure versions:
I-model: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
S-model: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width:
IK 9171, SK 9171: 17.5 mm
IL 9171, SL 9171: 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Monitoring of overvoltage
• Without auxiliary supply
• Settable response value
• De-energized on trip
• LED indicator for state of output relay
• 1 changeover contact
• As option energized on trip
• As option with delay t1 on trip
• As option with delay t2 on reset
• Devices available in 2 enclosure versions:
IK 9171: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9171: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Monitoring of undervoltage
• Without auxiliary supply
• Optionally fixed or settable response value
• N.C. circuit operation
• Optionally with off-delay t1
• Optionally with on-delay t2
• LED indicator for state of output relay
• 1 changeover contact
• Devices available in 2 enclosure versions:
IK 9173: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9173: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Indication of phase sequence in 3-phase systems
• Without auxiliary supply
• LED indicator for phase sequence
• Devices available in 2 enclosure versions:
IK 9178: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9178: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60255, DIN VDE 0435-303
• Detection of phase sequence in 3-phase systems
• Without auxiliary voltage
• Closed circuit operation
• LED indicator for phase sequence
• Output 1 changeover contact
• Devices available in 2 enclosure versions:
- I- and R-model, e.g. IK 9169 with depth 61 mm or RK 9169
withdepth 71 mm with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
- S-model, e.g. SK 9169 depth 100 mm, with terminals at
the top for cabinets with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255-1
• IP 9270, SP 9270CT: 3-phase
IK 9270, SK 9270, IL 9270, SL 9270CT: single phase
• Measuring ranges from 0.1 ... 100 A
• Settable response value
• Fixed hysteresis
• Settable time delay
• De-energized on trip
• As option energized on trip
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• Devices available in 2 enclosure versions:
-- I-model, e.g. IK _ _ _ _, depth 61 mm
with terminals at the bottom for installation systems and
industrial distribution systems according to DIN 43 880
-- S-model, e.g. SK _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• Width IK 9270, SK 9270: 17.5 mm
IL 9270, SL 9270CT: 35 mm
IP 9270, SP 9270CT: 70 mm

• According to IEC/EN 60 255-1
• IP 9271, SP 9271, SP 9271CT: 3-phase
IK 9271, IL 9271, SK 9271, SL 9271, SL 9271CT: single phase
• Measuring ranges from 0.1 ... 100 A
• IK 9271, SK 9271:
with 4 ranges settable by rotational switch, 1 changeover contact
• IL 9271, SL 9271:
with 5 ranges settable by rotational switch, 1 changeover contact
with 4 ranges programmable by bridges, 2 changeover contacts
• IP 9271, SP 9271: with 1 range, 2 changeover contacts
• Settable response value
• Fixed hysteresis
• Settable time delay
• De-energized on trip
• Optionally energized on trip
• LED indicators
• With auxiliary voltage
• Auxiliary supply and measuring input galvanic separated
• Devices available in 2 enclosure versions:
- I-model, e.g. IK _ _ _ _, depth 61 mm
with terminals at the bottom for installations systems
and industrial distribution systems according to DIN 43 880
- S-model, e.g. SK _ _ _ _, depth 100 mm
with terminals at the top for cabinets with mounting plate
and cable duct
• Width IK 9271, SK 9271: 17.5 mm
IL 9271, SL 9271, SL 9271CT: 35 mm
IP 9271, SP 9271, SP 9271CT: 70 mm

• According to IEC/EN 60 255
• Single phase
• Measuring ranges from 0.05 ... 10 A
• Fixed hysteresis approx. 4 %
• Adjustable switching delay
• Closed circuit operation
• Optionally open circuit operation
• Automatic reset
• Optionally manual reset, reset button on the front
• LED indication for auxiliary voltage
• 1 changeover contact
• Devices available in 2 enclosure versions:
IK 9272: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9272: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 60 255
• Single phase
• Measuring ranges from 0.05 ... 10 A
• Setting value adjustable from 0.1 ... 1 IN
• Fixed hysteresis approx. 4 %
• Settable switching delay
• Closed circuit operation
• Optionally open circuit operation
• Automatic reset
• Optionally manual reset, reset button on the front
• LED indication for auxiliary voltage and contact position
• 1 changeover contact
• Devices available in 2 enclosure versions:
IK 9273: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK 9273: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 17.5 mm

• According to IEC/EN 61 812-1
• 8 time ranges from 0.05 s to 300 h selectable via rotational switches
• Voltage range AC/DC 12 ... 240 V
• Adjustment aid for quick setting of long time values
• Suitable for 2-wire proximity sensor control
• 1 changeover contact
• As option connection of a remote potentiometer 10 kΩ
• As option with time interruption / time adding input
• LED indicators for operation, contact position and time delay
• Devices available in 2 enclosure versions:
I K 9906: depth 59 mm, with terminals at the bottom for installation
systems and industrial distribution systems according
to DIN 43 880
SK 9906: depth 98 mm, with terminals at the top for cabinets with
mounting plate and cable duct.
• 17.5 mm width

• According to IEC/EN 61 812-1
• 8 time ranges from 0.05 s to 300 h selectable via rotational switch
• With auxiliary supply
• Voltage range AC/DC 12 ... 240 V for auxiliary supply
and control input
• No voltfree control contact necessary
• Adjustment aid for quick setting of long time values
• LED indicators for operation, contact position and time delay
• 1 changeover contact
• As option connnection of remote potentiometer 10 kΩ
• Devices available in 2 enclosure versions:
IK 9962: depth 59 mm, with terminals at the bottom for installation
systems and industrial distribution systems according
to DIN 43 880
SK 9962: depth 98 mm, with terminals at the top for cabinets with
mounting plate and cable duct
• 17.5 mm width

• According to IEC/EN 60 255, DIN VDE 0435-303
• 2 independent relays in once enclosure
• 2 measuring ranges from 0.5 to 5 A
• Adjustable response values
• Fixed hysteresis
• Adjustable switching delay
• Closed circuit operation
• LED indicators
• with auyiliary voltage
• galvanic separation between Auxiliary Circuit and Measuring Circuit
• 2 models available:
IL 5201: 63 mm deep with terminals near to the bottom to be
mounted in consumer units or industrial distribution
systems according to DIN 43 880
SL 5201: 100 mm deep with terminals near to the top to be mounted
in cabinets with mounting plate and cable ducts
• Width: 35 mm

• According to IEC/EN 61 557-8
• For single and 3-phase AC-systems up to 0 ... 500 V and 10 ... 10000 Hz
• Adjustable tripping value RAL of 5 ... 100 kΩ
• Monitors also disconnected voltage systems
• De-energized on trip
• Auxiliary voltage Measuring Circuit and output contacts are galvanically separated
• Manual and auto reset
• With test and reset button
• Connections of external test and reset buttons possible
• LED indicators for operation and alarm
• 2 changeover contacts
• IL/SL 5880/200 with additional prewarning
- adjustable prewarning value 10 kΩ ... 5 MΩ
- output function programmable
• Variant IL/SL 5880/300 according to DIN VDE 0100-551 for mobile generator sets available
• 4 models available:
IL 5880, IP 5880: 61 mm deep with terminals near to the bottom to be mounted in consumer units
or industrial distribution systems according to DIN 43 880
SL 5880, SP 5880: 98 mm deep with terminals near to the top to be mounted in cabinets with
mounting plate and cable ducts
• DIN rail or screw mounting
• 35 mm width

• According to IEC/EN 61 557-8
• For DC voltage systems up to 12 ... 280 V
• Wide voltage range of measuring input UN DC 12 ... 280 V (on request DC 24 ... 500 V with separate auxiliary supply, Measuring range 20 ... 500 kΩ)
• Adjustable tripping value RAL of 5 ... 200 kΩ
• Selective ground fault indication for L+ and L- allows fast fault finding
• Without auxiliary supply
• De-energized on trip
• 2 changeover contacts
• Automatic or manual reset, programmable
• With test and reset buttons
• Connection for external test and reset button possible
• galvanic separated AC or DC auxiliary supply available as option
• adjustable time delay as option
• 2 models available:
IL 5881: 61 mm deep with terminals near to the bottom to be mounted in consumer units or industrial distribution systems according to DIN 43 880
SL 5881: 98 mm deep with terminals near to the top to be mounted in cabinets with mounting plate and cable ducts
• 35 mm width

• According to IEC/EN 62 020
• for AC and pulsating DC currants Type A to IEC/TR 60755
• 9 tripping values from 10 mA to 10 A or from 10 mA ... 30 A
• Frequency range 20 ... 2000 Hz
• Selection of manual or automatic reset
• With prewarning
• With test and reset button
• Broken wire detection
• Short reaction time
• With adjustable delay tv
• De-energized on trip
• LED indication for auxiliary supply and state of contact
• 2 x 1 changeover contact
• With sealable cover
• Devices available in 3 enclosure versions:
SL 5882: 100 mm deep with terminals near to the top to be mounted
in cabinets with mounting plate and cable ducts
- width 35 mm
- for connection of external residual current transformer,
e. g. DOLD ND 5016, ND5019

• According to DIN 19235
• Common alarm annunciator
• Expandable from 4 up to 160 inputs
• Open circuit inputs / closed circuit inputs  selectable via bridges X1-X2
• Delayed inputs up to 10 s
• Acknowledgement push button QH for external buzzer built in
• Accessories: Buzzer IK 8832, SK 8832
• Devices available in 2 enclosure versions:
I-model: depth 61 mm, with terminals at the bottom for installations systems and industrial distribution systems according to DIN 43 880
S-model: depth 100 mm, with terminals at the top for cabinets with mounting plate and cable duct
• Width 35 mm

Fault annunciator IL 5990, SL 5990:
• 4 inputs with LED on control unit
• 1 output for common signal and 1 output for audible alarm