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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• Two-functions safety monitoring module (double evaluation)
• 2 enabling paths with different shut-down behaviour, e.g. emergency exit opens both enabling paths (level 1); guard door monitoring only opens the second enabling path (level 2)
• Suitable for signal processing of potential-free contacts, e.g. Emergency Stop command devices (level 1), position switches with safety function, solenoid interlocks and safety sensors (level 2)
• 2 Signalling outputs
• Level 1: Reset with edge detection, Short-circuit recognition, Level 2 Opener (NC): Opener (NC) /

 
 
Ordering details
 
Product type descriptionSRB202CA/QT 24VDC
Article number101176214
EAN Code4250116201952
Replaced article number 101177151
eCl@ss27-37-19-01
 
Approval
 
Approval USA/CAN
 
Classification
 
StandardsEN ISO 13849-1, IEC 61508, EN 60947-5-1
PLbis e (STOP 0)
Control categorybis 4 (STOP 0)
DC99% (STOP 0)
CCF>65 points
PFH value≤ 2,0 x 10-8/h (STOP 0)
SILbis 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 lightSRB202CA/QT 24VDC
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 contactsAg-Ni, self-cleaning, positive action
Weight346
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 (Level 1)
Reset with edge detection (Y/N)Yes (Level 1)
Pull-in delay
- ON delay with reset buttontyp. 40 ms (Level 1)
typ. 500 ms (Level 2)
Drop-out delay
- Drop-out delay in case of emergency stoptyp. 50 ms
 
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)Yes
Mechanical life10.000.000 operations
Electrical lifetimeDerating curve available on request
restistance to shock10 g / 11 ms
Resistance to vibration To EN 60068-2-610…55 HZ, Amplitude 0,35 mm, ± 15 %
 
Ambient conditions
 
Ambient temperature
- Min. environmental temperature−25 °C
- Max. environmental temperature+45 °C
Storage and transport temperature
- Min. Storage and transport temperature−40 °C
- Max. Storage and transport temperature+85 °C
Protection class
- Protection class-EnclosureIP40
- Protection class-TerminalsIP20
- Protection class-ClearanceIP54
Air clearances and creepage distances To IEC/EN 60664-1
- Rated impulse withstand voltage Uimp4 kV
- Overvoltage categoryIII To VDE 0110
- Degree of pollution2 To VDE 0110
 
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 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 resistancemax. 100 mΩ
Power consumption4.4
Type of actuationDC
Rated operating voltage Ue24 VDC −15% / +20%, residual ripple max. 10%
Operating current Ie0,18 A
Electronic protection (Y/N)Yes
Fuse rating for the operating voltageInternal electronic trip,
tripping current > 1.0 A, Reset after approximately 1 second/s
Current and tension on control circuits
- S31, S32, S43, S4426 VDC, Test current: 100 mA
 
Inputs
 
Monitored inputs
- Short-circuit recognition (Y/N)Yes (Level 1)
- Wire breakage detection (Y/N)Yes
- Earth connection detection (Y/N)Yes
Number of shutters1
Number of openers3
Cable length1-channel without cross-wire detection:
1500 m with 1.5 mm²;
2500 m with 2.5 mm²;
2-channel with/ without cross-wire detection
Conduction resistancemax. 40 Ω
 
Outputs
 
Stop category0
Number of safety contacts2 piece
Number of auxiliary contacts2 piece
Number of signalling outputs0 piece
Switching capacity
- Switching capacity of the safety contactsmax. 250 VAC, 6 A ohmic (inductive in case of appropriate protective wiring)
- Switching capacity of the auxiliary contacts24 VDC, 2 A
Fuse rating
- Protection of the safety contacts6.3 A slow blow
- Fuse rating for the auxiliary contacts2 A slow blow
Utilisation category To EN 60947-5-1AC-15: 250 V / 1,5 A
DC-13: 24 V / 2 A
Note on the utilisation categorymax. residual current 6 A
Number of undelayed semi-conductor outputs with signaling function0 piece
Number of undelayed outputs with signaling function (with contact)2 piece
Number of delayed semi-conductor outputs with signaling function.0 piece
Number of delayed outputs with signalling function (with contact).0 piece
Number of secure undelayed semi-conductor outputs with signaling function0 piece
Number of secure, undelayed outputs with signaling function, with contact.2 piece
Number of secure, delayed semi-conductor outputs with signaling function0 piece
Number of secure, delayed outputs with signaling function (with contact).0 piece
 
LED switching conditions display
 
LED switching conditions display (Y/N)Yes
Number of LED´s6
LED switching conditions display
- The integrated LEDs indicate the following operating states.
- Position relay K4
- Position relay K2
- Position relay K1
- Position relay K3
- Supply voltage
- Internal operating voltage Ui
 
Miscellaneous data
 
Applications Guard system
Emergency-Stop button
Pull-wire emergency stop switches
Safety sensor
 
Dimensions
 
Dimensions
- Width22.5 mm
- Height100 mm
- Depth121 mm
 
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 an Emergency Stop command device (level 1) with external reset button (R), and guard door monitoring (level 2) with 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.
Automatic start:
Level 1: the automatic start is programmed by connecting the feedback circuit to the terminals X1/+24VDC.
Level 2: the automatic start is programmed by connecting the feedback circuit to the terminals X2/+24VDC.
If the feedback circuit is not required, establish a bridge
1 NC contact each time communicates the status of level 1 and level 2
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 19.09.2019 - 18:29:44h Kasbase 3.3.0.F.64I