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ST4 safety light sensor

  • ST4 safety light sensor

ST4 sensors

Panasonic's new concept of connecting 6 sets of sensor heads to 1 controller in series offers you maximum flexibility to solve your safety application. Just configure exactly the number of sensor heads and controllers required to protect the area in question, e.g. small openings or irregularly shaped spaces impractical for safety light curtains.

A beam interruption indicator is incorporated in both the emitter and receiver, which not only eases confirming operation but also facilitates aligning the beam axis.

The high-functional controller ST4-C12EX immediately diagnoses misaligned or abnormal sensor heads. Its digital display allows you to identify errors at a glance, and it supports both PNP and NPN polarities, easing stock management.


  • Series connection of 6 sets of sensor heads to 1 controller
  • Compact design
  • IP67 degree of protection
  • Three muting function patterns
  • High-functional type controller
  • Safety category 4


  • Extension cables: 1, 3, 5, 7, and 15m

Specifications ST4 sensor

  ST4-A1-J02 ST4-A1-J02V ST4-A1-J1 ST4-A1-J1V
Type Cable length 0.2m Cable length 0.2m
With emission amount adjuster
Cable length 1m Cable length 1m
With emission amount adjuster
Sensing range 0.1 to 15m
Sensing object ø9mm
Supply voltage Supplied from controller
Current consumption Emitter: 11mA or less,
Receiver: 9mA or less
Protection IP67
Usable ambient temperature −10 to +55 °C (No dew condensation or icing allowed), Storage: −25 to +70°C
Weight 45g 100g
Emitting element Infrared LED (Peak emission wavelength: 870nm)
Material Enclosure: PBT (Polybutylene terephthalate), Lens: Acrylic, Indicator cover: Acrylic
Cable Shielded cable with connector, 0.2m long Shielded cable with connector, 1m long
Safety category EN 13849-1 (Category 4)

Specifications ST4 controller

Sensor Type Controller High-functional controller
  ST4-C11 ST4-C12EX
Safety category ISO 13849-1 (Category 4)
Supply voltage 24V DC +10/ −15 % Ripple P-P 10% or less
Current consumption 100mA or less (excluding sensor heads) 120mA or less (excluding sensor heads)
Output transistors OSSD1 and OSSD2 (PNP or NPN, switchable), max. 200mA
Response time ON -> OFF: 25ms or less
OFF -> ON: 90ms or less (auto reset) / 140ms or less (manual reset)
Protection Enclosure: IP40 (IEC), Terminal: IP20 (IEC)
Ambient temperature −10 to +55 °C (No dew condensation or icing allowed),
Storage: −25 to +70°C
Material Enclosure: ABS
Weight 180g 240g

ST4 typical applications

Product Feature

Protection for long sensing ranges

Product Feature

Protection for small openings

Product Feature

Protection against non-authorized entry

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