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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• To monitor 1 ... 4 safety edge(s)
• 1 safety contact, STOP 0
• 1 Signalling output

Preferred typ
Ordering details
Product type descriptionSE-304C
Article number101165883
EAN Code4030661293622
Approval TÜV
StandardsEN ISO 13849-1
PLup d
Control categoryup 3
PFH value1.01 x 10-7 /h
- noticeup to max. 5000 switching cycles/year
Mission time20 Years
Global Properties
Permanent lightSE-304C
StandardsEN ISO 13856-2, EN ISO 13849-1
Compliance with the Directives (Y/N) Yes
Product utilisation up to category in accordance with EN 9543
Climatic stressEN ISO 13856-2
Mountingsnaps onto standard DIN rail to EN 60715
- terminalsIP20
- enclosureIP40
- ClearanceIP54
- Material of the housingsPlastic, thermoplastic
Start conditionsAutomatic or Start button
Start input (Y/N)Yes
Feedback circuit (Y/N)No
Reset after disconnection of supply voltage (Y/N)Yes
Automatic reset functionYes
Reset with edge detection (Y/N)Yes
Pull-in delay
- ON delay with reset button100 … 2000
Response time< 17
Mechanical data
Connection typeScrew connection
Cable section
- Min. Cable section
- Max. Cable section2 x 1.5
Detachable terminals (Y/N)No
Mechanical life> 10.000.000 operations
noticeAll indications about the cable section are including the conductor ferrules.
Resistance to vibration10 … 55 HZ, Amplitude 0,15 mm
Ambient conditions
Ambient temperature
- Min. environmental temperature+5
- Max. environmental temperature+55
Protection class
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 controls21.6
- Max. rated DC voltage for controls28.8
Rated AC voltage for controls, 50 Hz
- Min. rated AC voltage for controls, 50 Hz21.6
- Max. rated AC voltage for controls, 50 Hz28.8
Rated AC voltage for controls, 60 Hz
- Min. rated AC voltage for controls, 60 Hz-
- Max. rated AC voltage for controls, 60 Hz-
Power consumption< 4
Type of actuationAC/DC
Rated operating voltage Ue24 VDC +20% / −10%;
24 VAC +10% / −10%
Operating current Ieapprox. 500 mA (for 4 Safety edges)
Frequency range50
Electronic protection (Y/N)Yes
Monitored inputs
- Short-circuit recognition (Y/N)Yes
- Wire breakage detection (Y/N)Yes
- Earth connection detection (Y/N)Yes
Cable length200
Stop category0
Number of safety contacts1
Number of auxiliary contacts0
Number of signalling outputs1
Switching capacity
- Switching capacity of the safety contacts230 VAC / 2 A;
24 VDC / 2 A
Fuse rating
- Protection of the safety contacts2 A gG D-fuse
Utilisation categoryAC-15: 230 V / 2 A;
DC-13: 24 V / 2 A
Number of undelayed semi-conductor outputs with signaling function1
Number of undelayed outputs with signaling function (with contact)0
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.1
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´s5
LED switching conditions display
- The integrated LEDs indicate the following operating states.
- Supply voltage UB
- Authorized operation
- Safety edge function for 4 Safety edges
- fault indication
Miscellaneous data
Applications Safety edges
Width22.5 mm
Height100 mm
Depth121 mm
The overall machine safety depends on the professional mounting and installation of the safety monitoring module and the signal transmitter, as well as on the correct and professional electrical connection of the components.
If there it any risk whatsoever, the machine may not be restarted.
notice - Wiring example
Monitoring the safety edges SE 40 / SE 70 with a safety monitoring unit SE-304C up to PL d and Category 3.
Manual reset function or auto-reset:
The manual reset function is triggered by an edge-sensitive signal (edge switching "0-1-0" within 100 ms up to 2 s) (X2/X3). Alternatively, the auto-reset function can be activated by a connection (A3/X2).
Both re-initialisation and auto-reset must comply with the requirements of EN 1760-2 (diagram A2, A3).
If less than 4 safety edges are connected, the following diagram must be observed.
The wiring diagram is shown for the 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 20.09.2019 - 13:50:39h Kasbase 3.3.0.F.64I