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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• 2 cable entries M 20 x 1.5
• Mounting details to EN 50047
• Thermoplastic enclosure
• Double-insulated
• 58 mm x 50,5 mm x 31 mm
• Good resistance to oil and petroleum spirit
• Wide range of alternative actuators
• Actuator heads can be repositioned by 4 x 90°

Ordering details
Product type descriptionT4R 256-02ZH - Ordering suffix
Article number101145161
EAN Code4030661136325
StandardsISO 13849-1
B10d Normally-closed contact (NC)20.000.000
Mission time20 Years
Global Properties
Permanent lightT 256 Rollendruckbolzen mit Zentralbefestigung 4r
StandardsIEC 60947-5-1, ISO 13849-1, BG-GS-ET-15
Compliance with the Directives (Y/N) Yes
Suitable for safety functions (Y/N)Yes
- Material of the housingsPlastic, glass-fibre reinforced thermoplastic, self-extinguishing
- Material of the contactsSilver
Housing coatingNone
Housing construction formNorm construction design
Mechanical data
Design of electrical connectionScrew connection
Cable section
- Min. Cable section0,75
- Max. Cable section2.5
Mechanical life20.000.000 operations
Switching frequencymax. 5000 /h
noticeAll indications about the cable section are including the conductor ferrules.
Design of actuating elementRoller plunger
Actuating forcemin. 9 N
Bounce durationin accordance with actuating speed
Switchover timein accordance with actuating speed
Positive break force19 N
Actuating speed with actuating angle 30° to switch axis
- Min. Actuating speed120 mm/min
- Max. Actuating speed1 m/s
Ambient conditions
Ambient temperature
- Min. environmental temperature−30 °C
- Max. environmental temperature+80 °C
Protection classIP67
Electrical data
Design of control elementOpener (NC)
Switching principleSlow action with staggered contacts
- positive break NC contact
Number of auxiliary contacts2
Number of safety contacts0
Rated impulse withstand voltage Uimp6 kV
Rated insulation voltage Ui500 V
Thermal test current Ithe10 A
Utilisation categoryAC-15: 230 V / 4 A,
DC-13: 24 V / 1 A
Required rated short-circuit current1000 A
Max. fuse rating6 A gG D-fuse
Dimensions of the sensor
- Width of sensor58 mm
- Height of sensor90.5 mm
- Length of sensor31 mm

Note Diagram
  positive break NC contact
  no active
  Normally-open contact
  Normally-closed contact
Switch travel diagram

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
Ordering suffix
The applicable ordering suffix is added at the end of the part number of the safety switch.
Order example: T4R 256-02zh-1637
...-1637 0,3 µm gold-plated contacts

...-NPT Cable entry NPT 1/2“

...-2310 M12 connector with B-coding

...-1297 Enclosure with transverse slotted holes

...-ST M12 connector with A-coding

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 13.12.2019 - 18:47:03h Kasbase 3.3.0.F.64I