Notes Switch travel diagram
  Contact closed
  Contact open
  Setting range
  Break point
  Positive opening sequence/- angle
VS  adjustable range of NO contact
  adjustable range of NC contact
N   after travel
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• STOP 0 Function
• Monitoring of 4 sensors
• Start button / Auto-start
• 2 Safety outputs
• 4 Signalling outputs

Ordering details
Product type descriptionSRB-E-204ST
Article number103009973
EAN Code
Relay outputs
Control category
PFH value
PFD value
Mission time
Semi-conductor outputs
StandardsEN ISO 13849-1, IEC 61508, IEC/EN 62061
PLup e
Control categoryup 4
PFH value≤ 2.66 x 10−9/ h
PFD value≤ 2.42 x 10−5
SILup 3
Mission time20 Years
Global Properties
Permanent lightSRB-E-204ST
StandardsIEC/EN 60204-1, EN 60947-5-1, EN ISO 13849-1, IEC 61508, IEC/EN 62061
Compliance with the Directives (Y/N) Yes
Mountingsnaps onto standard DIN rail to EN 60715
Terminal designationsIEC/EN 60947-1
- Material of the housingsPlastic, glass-fibre reinforced thermoplastic, ventilated
- Material of the contacts
Start conditionsAutomatic or Start button (Optional monitored)
Start input (Y/N)Yes
Feedback circuit (Y/N)Yes
Start-up test (Y/N)No
Automatic reset function (Y/N)Yes
Reset with edge detection (Y/N)Yes
Pull-in delay
- ON delay with automatic start< 150
- ON delay with reset button< 150
Drop-out delay
- Drop-out delay in case of power failure< 10
- Drop-out delay in case of emergency stop< 10
Mechanical data
Connection typeScrew connection, plug-in
Cable section
- Min. Cable section0,25
- Max. Cable section2.5
Pre-wired cablerigid or flexible
Tightening torque for the terminals0,5
Detachable terminals (Y/N)Yes
Mechanical life
Electrical lifetimeDerating curve available on request
restistance to shock30 / 11
Resistance to vibration To EN 60068-2-610…55 HZ, Amplitude 0,35 mm
Ambient conditions
Ambient temperature
- Min. environmental temperature−25
- Max. environmental temperature+60
Storage and transport temperature
- Min. Storage and transport temperature−40
- Max. Storage and transport temperature+85
Protection class
- Protection class-EnclosureIP40
- Protection class-TerminalsIP20
- Protection class-ClearanceIP54
Air clearances and creepage distances To IEC/EN 60664-1
- Rated impulse withstand voltage0,8
Overvoltage categoryIII
- Degree of pollution2 To IEC/EN 60664-1
Electromagnetic compatibility (EMC)
EMC ratingconforming to EMC Directive
Electrical data
Rated DC voltage for controls
- Max. rated DC voltage for controls19.2
- Max. rated DC voltage for controls28.8
Rated AC voltage for controls, 50 Hz
- Min. rated AC voltage for controls, 50 Hz
- Max. rated AC voltage for controls, 50 Hz
Rated AC voltage for controls, 60 Hz
- Min. rated AC voltage for controls, 60 Hz
- Max. rated AC voltage for controls, 60 Hz
Contact resistance
Power consumption3
Type of actuationDC
Switch frequency1
Rated insulation voltage50
Rated operating voltage24 −20 / +20, residual ripple 10
Operating current0,125 A
Frequency range
Electronic protection (Y/N)No
Fuse rating for the operating voltageWe recommend a Z type circuit breaker (max. 16 A) either a fine-wire fuse (max. 15A, slow-blow)
Bridging in case of voltage drops5
Cyclic outputs> 20 , 10 for each output
Control inputs24 / 8
Monitored inputs
- Short-circuit recognition (Y/N)Yes
- Wire breakage detection (Y/N)Yes
- Earth connection detection (Y/N)Yes
Number of shutters4
Number of openers8
Cable length1500 with 1.5 ;
2500 with 2.5
Conduction resistance40
Stop category0
Number of safety outputs2 x STOP 0
Number of safety contacts0
Number of auxiliary contacts0
Number of signalling outputs4 x STOP 0
Relay outputs
Switching capacity of the safety contacts
Protection of the safety contacts
Utilisation category
Switching capacity of the safety contacts
Fuse rating for the auxiliary contacts
Semi-conductor outputs
Switching capacity of the safety outputs2 A (inductive in case of appropriate protective wiring)
Voltage drop< 0,5
Residual current< 1
Test impulse width< 1
< 100
Fuse rating for the safety outputs
Utilisation categoryDC-13: 24 V / 2 A
Switching capacity of the signaling/diagnostic outputs24 / 100
Fuse rating for the signaling/diagnostic outputsInternal electronic trip
LED switching conditions display
LED switching conditions display (Y/N)Yes
Number of LED´s7
LED fault codesYes
Miscellaneous data
Applications Emergency-Stop button
Pull-wire emergency stop switches
Safety light barriers
Safety light curtain
Safety sensor
hinged safety guard
- Width22.5
- Height98
- Depth115

K.A. Schmersal GmbH & Co. KG, Möddinghofe 30, D-42279 Wuppertal
The data and values have been checked throroughly. Technical modifications and errors excepted.
Generiert am 16.09.2019 - 15:00:29h Kasbase 3.3.0.F.64I