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E3C-LDA21 2M

Photoelectric Sensor with Separate Digital Amplifier (Laser-type)


Amplifier Unit, Light-ON/Dark-ON selectable, NPN, Pre-wired models, Timer function

Connection method Pre-wired models

Item list of E3C-LDA

  • Ratings/Performance
Separate Amplifier classificationAmplifier Unit
Power supply voltage12 to 24 VDC±10% ripple (p-p) 10% max.
Current consumption45 mA max.
Power consumption1080 mW max. (20 VDC)
Control outputNPN open collector
26.4 VDC max.
50 mA max.
Residual voltage: 1 V max.
Operation modeLight-ON/Dark-ON selectable
Protective circuitMutual interference prevention
Response timeSuper-high-speed mode: 80 µs max.
High-speed mode: 250 µs max.
Standard mode: 1 ms max.
High-resolution mode: 4 ms max.
Timer functionSelect from ON-delay, OFF-delay, or one-shot timer
1 ms to 5 s
Ambient temperature (Operating)Groups of 1 to 2 unit: -25 to 55℃
Groups of 3 to 10 Sensors: -25 to 50℃
Groups of 11 to 16 Sensors: -25 to 45℃
(with no icing)
Ambient temperature (Storage)-30 to 70℃ (with no icing)
Ambient humidityOperating: 35 to 85% (with no condensation)
Storage: 35 to 85% (with no condensation)
Insulation resistance20 MΩ (500 VDC megger)
Dielectric strength1000 VAC 50/60 Hz 1 min
Vibration resistanceDestruction: 10 to 55 Hz, 1.5 mm double amplitude each in X, Y, and Z directions for 2 h
Shock resistanceDestruction: 500 m/s**2 3 times each in X, Y and Z directions
Degree of protectionIEC: IP50
Connection methodPre-wired models (Cable length 2 m)
IndicatorOperation indicator (orange), Power tuning indicator (orange), Digital Display
WeightPackage: Approx. 100 g
MaterialCase: Polybutylene terephthalate (PBT)
Cover: Polycarbonate
Amplifier unit/senso head of combinationE3C-LD11 2M, E3C-LD21 2M, E3C-LD31 2M, E3C-LR11 2M, E3C-LR12 2M
  • Output circuit diagram


Photoelectric Sensor with Separate Digital Amplifier (Laser-type)