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• 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

Extension unit IL 5991, SL 5991:
• 4 inputs with LED on control unit

• Increases life of 1-phase squirrel motors and mechanical drives
• Devices available in 2 enclosure version:
IL 9017: depth 61 mm with terminals at the bottom for
installations systems and industrial distribution systems
according to DIN 43 880
SL 9017: depth 100 mm with terminals at the top for
cabinets with mounting plate and cable duct
• For single phase motors up to 1.5 kW
• Adjustable ramp time and starting torque
• Semiconductors will be bridged after start up
• LED indication
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Detection of over- or underspeed or frequency, function
selectable
• 3 selectable ranges for frequency or speed, adjustable tripping
value
• Ranges up to 10 kHz ( 600.000 ipm) available,therefore suitable
for turbines, centrifuges and similar applications
• Adjustable hysteresis
• Input also suitable for SKF sensor bearings
• As option for Namur sensors
• As option for permanent magnet sensors
• As option with adjustable switching delay/start up delay
• On request with manual reset
• IK 9055 and SK 9055: compact version for DC 24 V auxiliary
supply
• IL 9055 and SL 9055: for auxiliary supply up to AC 400 V with
galvanic separation to sensor input
• De-energized on trip (Energized on trip on request)
• 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 9055: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SK/SL 9055: depth 98 mm, with terminals at the top for
cabinets with mounting plate and cable duct
• IK 9055, SK 9055: width 17.5 mm
• IL 9055, SL 9055: width 35 mm

• According to DIN EN 60255
• Detection of incorrect phase sequence
• No separately auxiliary voltage necessary
• Nominal voltage range 3 AC 380 ... 690 V
• Suitable for operation with inverters (f = 40 ... 80 Hz)
• Relay output:
- IL/SL 9059: 1 changeover contact
- OA 9059: 1 NC contact
• Extended temperature range
• Devices available in 3 enclosure versions:
I L 9059: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution systems
according to DIN 43 880
SL 9059: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• OA 9059: sealed modul with stranded wire connection
suitable for mounting in terminal box
• Width
- IL/SL 9059: 35 mm
- OA 9059: 62 mm

• According to EN 60 255-1
• Detection of underload (cos ϕ)
• Without auxiliary supply
• Current up to 8 A
Motors up to 5 A nominal current can be connected directly
• Higher currents via current transformer
• SL 9065CT with integrated current transformer for currents up to 100 A
• Adjustable response value
• Automatic reset (Alarm auto reset)
• Adjustable operate delay up to 100 s
• De-energized on trip
• For single and 3-phase loads e.g. motors
• Independent of phase sequence
• 1 changeover contact
• LED indicator voltage supply and alarm
• Devices available in 2 enclosure versions: IK 9065: depth 58 mm,
with terminals at the bottom for installation systems and industrial
distribution systems according to DIN 43 880
SK 9065, SL 9065CT: depth 98 mm, with terminals at the top for
cabinets with mounting plate and cable duct
• IK 9065, SK 9065 width 17.5 mm
SL 9065CT width 35 mm
IK/SK 9065/100: as IK/SK 9065 but:
• programmable for
- automatic reset or manual reset (latched alarm)
- energized or de-energized on trip
• with reset button
• remote reset

• According to IEC/EN 60 255-1
• Detection of
-- missing neutral in the system
-- broken neutral on IL/SL 9069
-- neutral exchanged against phase
• Detection of phase failure also with disconnected load
• For 3-phase systems
• De-energized on trip
• LED indicator for operation/state of output contacts
• Single phase connection possible
• Without auxiliary voltage
• 2 cangeover contacts
• Optionally with adjustable asymmetry detection and on delay
• Devices available in 2 enclosure version:
IL 9069: depth 59 mm with terminals at the bottom for
installations systems and industrial distribution
systems according to DIN 43 880
SL 9069: depth 98 mm with terminals at the top for
cabinets with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Identification of
- undervoltage
- phase failure
- asymmetry also with reverse voltage
- missing neutral in the system
- broken neutral on IL/SL 9071
- neutral exchanged against phase
• Single phase connection possible
• According to DIN VDE 0100-710
(for rooms used for medical purposes) as an option
• Fixed setting value (variable as an option)
• Closed circuit operation principle
• LED indicator
• With safe disconnection according to IEC/EN 61 140,
IEC/EN 60 947-1 between the Measuring Circuit and the contacts
• Independant of phase sequence
• 2 changeover contacts
• Devices available in 2 enclosure version:
IL 9071: depth 61 mm with terminals at the bottom for
installations systems and industrial distribution
systems according to DIN 43 880
SL 9071: depth 98 mm with terminals at the top for
cabinets with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Recognizes fuse failures in three-phase mains up to 3 AC 690 V
• Can be used for all types and sizes of fuses
• Independent of phase sequence
• Signals even if loads are switched off
• No malfunction on
- asymmetrical mains
- mains with harmonic waves
- motors producing feedback
• Shorter response time than with motor circuit-breakers
• Green LED for intact fuses
• Red LED for fuse failure
• As option: open/closed circuit operation in the case
of IP 9075 programmable via X4-X5 or X3-X4
• As option: with manual reset function and remote reset,
programmable via X1-X2
• As option: 1 NO contact or 2 changeover contacts
• 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
• IL 9075, SL 9075: width 35 mm
IP 9075, SP 9075: width 70 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Identification of overvoltage, undervoltage and phase failure
• With asymmetry identification as an option
• Mains fault diagnostics with a number of LEDs
• Setting values for overvoltage and undervoltage can be set
separately
• Large Setting Ranges 0.9 ... 1.3 UN and 0.7 ... 1.1 UN
• Time delay variable between 0.1 ... 20 s
• Closed circuit operation
• No auxiliary voltage
• Independant of phase sequence
• As option with phase sequence detection
• Single-phase connection possible
• Optionally for 3P3W Systems
• 2 changeover contacts, at IP/SP 9077 2 x 2 changeover contacts
• 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
• IL 9077, SL 9077: width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• Fast detection of undervoltage or phase failure in three-phase
voltage systems
• Detects auto reclosing of 20 ms
• Adjustable response value 0.55 ... 1.05 UN
• Operate delay to generate a defined reset signal
• Manual reset possible with external circuit
• Single-phase connection possible
• Optionally fixed response value 0.8 UN
• Closed circuit operation principle
• Green LED indicate for closed contact
• Independant of phase sequence
• 3p4w connection
• Optionally for 3p3w systems
• 2 changeover contacts
• Devices available in 2 enclosure versions:
IL 9079: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SL 9079: depth 98 mm, with terminals at the top for cabinets
for mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0660 part 302
(pr EN 60 947-8) and part 303
• Monitoring of
- Undervoltage 3 phase
- Phase failure
- Phase sequence
- Loss of neutral
- Phase asymmetry
- Overtemperature
- Broken wire in thermistor circuit
- Short circuit in thermistor circuit
• Without auxiliary supply
• 1 sensing input for 1 ... 6 thermistors
• LED indication
- Supply voltage
- Measuring voltage
- Temperature
• As option with manual reset on temperature fault
• 2 x 1 changeover contact
• Depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, VDE 0435, DIN VDE 0660 part 302
(pr EN 60 947-8) and part 303
• Monitoring of phase failure
- Undervoltage 3-phase 3 or 4 wire
- Phase failure
- Phase sequence
- Loss of neutral
- Phase asymmetry
• Without auxiliary supply
• De-energized on trip
• LED indication
- Supply voltage
- Phase failure
• 1 or 2 changeover contacts
• Depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 35 mm

• According to IEC/EN 60 255, DIN VDE 0435-303
• 1 PT100 input, 2-wire connection
• 3 temperature ranges
• Adjustable response value
• Adjustable Hysteresis with wide range 3 ... 30 °C or 1 ... 15°C
• Broken wire detection in sensor circuit
• Programmable hysteresis or latching function via terminal X1
• IK 9094 no galvanic separation between measuring and Auxiliary Circuit
• Closed circuit operation
• LED indicator for operation and state of output relay
• 1 changeover contact
• As option with response value up to - 50°C, e.g. for refrigeration plants
• As option with galvanic separation between measuring and
Auxiliary Circuit
• 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
• IK 9094, SK 9094: 17.5 mm width
IL 9094, SL 9094: 35 mm width

• 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
• 3 probe connections for 2-point and 1-point level control
• Also for use as moisture detector
• High interference resistance of the Measuring Circuit,
which is isolated from the mains
• Max. wire length to the probes: 1500 m
• Large setting range: 2 ... 450 kΩ
this permits differentiation between fluid and foam
• Separately adjustable response and release time delay
0.2 ... 20 s for MIN- and MAX-level
• Programmable for:
- 2 separate controllable output relays for MIN and MAX level
- common controlled output relays for 2-point hysteresis
level control
- open circuit operation
- closed circuit operation
• Measuring Circuit for probes works with internally generated
AC voltage (approx. 30 Hz), electrolytic behaviour does not
occur in the liquid
• For auxiliary voltages of 24 ... 415 V AC or 24 V DC
• LEDs for operation and state of contact
• 2 changeover relays with 1 changeover contact each
• IL 9151 and SL 9151 with safe separation according to
IEC/EN 61 140, IEC/EN 60 947-1
• Devices available in 3 enclosure versions:
IL 9151: depth 59 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SL 9151,
MK 9151N: depth 98 mm, with terminals at the top for
cabinets with mounting plate and cable duct
• IL/SL 9151: 35 mm width
MK 9151N: 22.5 mm width

• According to IEC/EN 60 255-1
• Monitoring of:
-- overtemperature
-- broken wire detection in sensor circuit
• 1 input for 1 to 6 PTC-resistors
• With manual reset variant /100
• Optionally with button for reset and test function
• Remote reset on A1/A2 (NC contact) or
X1/X2 (NO contact)
• Closed circuit operation
• LED indicator for
-- auxiliary supply
-- state of contact
• 2 changover contacts
• Devices available in 2 enclosure versions:
IL 9163: depth 58 mm, with terminals at the bottom for
installation systems and industrial distribution
systems according to DIN 43 880
SL 9163: depth 98 mm, with terminals at the top for cabinets
with mounting plate and cable duct
• Width 35 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 60 255-1
• 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 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, DIN VDE 0435-303
• 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