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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• Suitable for signal processing of potential-free outputs, e.g. emergency stop command devices, position switches and solenoid interlocks
• 3 safety contacts, STOP 0, 1 Auxiliary contact

 
 
Ordering details
 
Product type descriptionSRB 301LC/8
Article number101197553
EAN Code
eCl@ss27-37-19-01
 
Approval
 
Approval
 
Classification
 
StandardsEN ISO 13849-1, IEC 61508, EN 60947-5-1
PLup e (STOP 0)
Control categoryup 4 (STOP 0)
DC99 (STOP 0)
CCF> 65 points
PFH value≤ 2, 0 x 10-8/ (STOP 0)
SILup 3 (STOP 0)
Mission time20 Years
- noticeThe PFH value is applicable for the combinations listed in the table for contact load (K) (current through enabling paths) and switching cycle number (n-op/y).
In case of 365 operating days per year and a 24-hour operation, this results in the specified switching cycle times (t-cycle) for the relay contacts.
Diverging applications on request.
 
Global Properties
 
Permanent lightSRB 301LC/8
StandardsIEC/EN 60204-1, EN 60947-5-1, EN ISO 13849-1, IEC 61508
Compliance with the Directives (Y/N) Yes
Climatic stressEN 60068-2-78
Mountingsnaps onto standard DIN rail to EN 60715
Terminal designationsIEC/EN 60947-1
Materials
- Material of the housingsPlastic, glass-fibre reinforced thermoplastic, ventilated
- Material of the contacts, self-cleaning, positive action
Weight250
Start conditionsAutomatic or Start button
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)No
Pull-in delay
- ON delay with automatic start110
- ON delay with reset button20
Drop-out delay
- Drop-out delay in case of power failure30
- Drop-out delay in case of emergency stop≤ 30
 
Mechanical data
 
Connection typeScrew connection
Cable section
- Min. Cable section0,25
- Max. Cable section2.5
Pre-wired cablerigid or flexible
Tightening torque for the terminals0,6
Detachable terminals (Y/N)No
Mechanical life10.000.000 operations
Electrical lifetimeDerating curve available on request
restistance to shock10 / 11
Resistance to vibration To EN 60068-2-610…55 HZ, Amplitude 0,35 mm, ± 15 %
 
Ambient conditions
 
Ambient temperature
- Min. environmental temperature−25
- Max. environmental temperature+45
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 voltage4
Overvoltage categoryII To VDE 0110
- Degree of pollution2 To DIN IEC 60664-1
 
Electromagnetic compatibility (EMC)
 
EMC ratingconforming to EMC Directive
 
Electrical data
 
Rated DC voltage for controls
- Max. rated DC voltage for controls20.4
- Max. rated DC voltage for controls28.8
Rated AC voltage for controls, 50 Hz
- Min. rated AC voltage for controls, 50 Hz20.4
- Max. rated AC voltage for controls, 50 Hz26.4
Rated AC voltage for controls, 60 Hz
- Min. rated AC voltage for controls, 60 Hz20.4
- Max. rated AC voltage for controls, 60 Hz26.4
Contact resistance100
Power consumption2
Type of actuationAC/DC
Switch frequency
Rated operating voltage24 −15 / +20, residual ripple 10
24 −15 / +10
Operating current
Frequency range50 / 60
Electronic protection (Y/N)Yes
Fuse rating for the operating voltageInternal electronic trip, tripping current > 0,4 A
Reset after approximately 1 second/s
Bridging in case of voltage drops20
 
Inputs
 
Monitored inputs
- Short-circuit recognition (Y/N)Yes
- Wire breakage detection (Y/N)Yes
- Earth connection detection (Y/N)Yes
Number of shutters0
Number of openers2
Cable length1500 with 1.5 ;
2500 with 2.5
Conduction resistance40
 
Outputs
 
Stop category0
Number of safety contacts3
Number of auxiliary contacts1
Number of signalling outputs0
Switching capacity
- Switching capacity of the safety contacts250 , 6 A ohmic (inductive in case of appropriate protective wiring)
10 , 10
- Switching capacity of the auxiliary contacts24 , 2 A
Fuse rating
- Protection of the safety contacts6 A slow blow
- Fuse rating for the auxiliary contacts2 A slow blow
Utilisation category To EN 60947-5-1AC-15: 230 V / 6 A
DC-13: 24 V / 6 A
Number of undelayed semi-conductor outputs with signaling function0
Number of undelayed outputs with signaling function (with contact)1
Number of delayed semi-conductor outputs with signaling function.0
Number of delayed outputs with signalling function (with contact).0
Number of secure undelayed semi-conductor outputs with signaling function0
Number of secure, undelayed outputs with signaling function, with contact.3
Number of secure, delayed semi-conductor outputs with signaling function0
Number of secure, delayed outputs with signaling function (with contact).0
 
LED switching conditions display
 
LED switching conditions display (Y/N)Yes
Number of LED´s4
LED switching conditions display
- The integrated LEDs indicate the following operating states.
- Position relay K1
- Position relay K2
- Supply voltage
- Internal operating voltage
 
Miscellaneous data
 
Applications Emergency-Stop button
Guard system
Pull-wire emergency stop switches
Safety light curtain
Safety sensor
 
Dimensions
 
Dimensions
- Width22.5
- Height100
- Depth121
 
notice
 
Inductive loads (e.g. contactors, relays, etc.) are to be suppressed by means of a suitable circuit.
 
notice - Wiring example
 
Input level: The example shows a 2-channel control of a guard door monitoring with two position switches, whereof one with positive break, external reset button (R); cross-wire monitoring and feedback circuit (H2)
The control recognises cross-short, cable break and earth leakages in the monitoring circuit.
Relay outputs: Suitable for 2 channel control, for increase in capacity or number of contacts by means of contactors or relays with positive-guided contacts.
In case of a 1-channel control, connect the NC contact to the operating voltage and bridge S11/S12 and S21/S22.
Automatic start: The automatic start is programmed by connecting the feedback circuit to the terminals X1/X2. If the feedback circuit is not required, establish a bridge
The wiring diagram is shown with guard doors closed and in de-energised condition.

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 24.04.2019 - 15:58:27h Kasbase 3.3.0.F.64I