Datasheet
A-241E3S-A
E3S-A
Self-diagnostic Function
With this function, the E3S-A checks changes in environmental conditions (especially a change in the ambient temperature) and
self-diagnoses the resistance against the changes. The result is shown by the indicators or an output signal.
External Diagnostic Input Function
To switch the emission off, short-circuit the pink and the blue cords of the emitter of
the E3S-AT or the E3S-AR with the NPN output feature. For the E3S-AT or the E3S-
AR with the PNP output feature, short-circuit the pink and the brown cords. With this
function, the operating status can be checked before operation.
Amount of
incident light
Green indicator Indicator Incident light
indicator (red)
Self-diagnostic
function
Self-diagnostic example
1.2 or more Stable operating
state with inci-
dent light: Stable
operation is ex-
pected in the rat-
ed temperature
range with the
green indicator
ON.
With light inci-
dent (red indica-
tor: ON)
--- ---
1.0 to 1.2 Conditional oper-
ating state with
incident light:
Stable operation
is expected if the
temperature fluc-
tuation is within
±10% of the pri-
mary tempera-
ture.
The self-diag-
nostic alarm
output alerts
the user to this
state if it contin-
ues for 0.3 s.
0.8 to 1.0 Without light inci-
dent (red indica-
tor: OFF)
0.8 or less Stable operating
state with no inci-
dent light: Stable
operation is ex-
pected in the rat-
ed temperature
range with the
green indicator
ON.
--- ---
Green Red
Green Red
The optical axis misaligned by vibration.
Light decreased by dust.
Dust
Green Red
With the influence
of external noise
Sensing object
Noise
Sensing
object
With light leakage (through-beam
and retroreflective Sensors)
Light reflected from the floor or the back-
ground (diffuse reflective Sensors)
Green Red
With emission
Brown + V
Brown + V
Blue 0 V
Blue 0 V
OFF
(with PNP output)
OFF
(with NPN output)
Pink (External-
diagnostic input)
ON
(with PNP output)
ON
(with NPN output)
Pink (External-
diagnostic input)
E3S-AT@/E3S-AR@
emitter
E3S-AT@/E3S-AR@
emitter
Without emission