Datasheet

A-234 Standard Photoelectric Sensors
With self-diagnostic functions
Sensing method Through-beam, Retrore-
flective (polarized)
Diffuse reflective: 10 cm Diffuse reflective: 20 cm Diffuse reflective: 70 cm
Model NPN output E3S-AT21
E3S-AR21
E3S-AT71
E3S-AR71
E3S-AD23
E3S-AD73
E3S-AD21
E3S-AD71
E3S-AD22
E3S-AD72
PNP output E3S-AT41
E3S-AR41
E3S-AT91
E3S-AR91
E3S-AD43
E3S-AD93
E3S-AD41
E3S-AD91
E3S-AD42
E3S-AD92
Wavelength of LED light
source
700 nm (red) 880 nm (infrared) 700 nm (red) 880 nm (infrared)
Sensitivity adjustment Two-turn (endless) sensitivity adjustor with indicator
Self-diagnostic functions Self-diagnostic output,
External diagnostic input
Self-diagnostic output
Timer 0 to 100 ms OFF-delay varable adjustor
Turbo function Yes (with turbo switch) ---
Method of connection Prewired
Weight 60 g
Operation mode Dark-ON or Light-ON (switchable)
Output Open collector current output (NPN or PNP)
Circuit protection Load short-circuit protection, reverse connection protection, mutual interference prevention (except for
through-beam models) functions
Indicators Light indicator (red) and stability indicator (green); emittion indicator (red) for the emitter of the through-beam
model
Materials Case:
Lens:
Mounting bracket:
Polybutylene terephtalate
Denaturated polyallalate
Stainless steel (SUS304)
Attachments Mounting bracket, sensitivity adjustor knob, screws, sensitivity adjustor cover, close-mounting plate (only for
Sensors with connector terminals) and reflector (E39-R1: only for retroreflective Sensors)