Installation Of Accessories; Mounting Bracket - Omron E3S-A Datasheet

Adjustor Cap
In order to prevent the sensitivity or OFF-delay time that has
been set from changing accidentally enclosed, cover the ad-
justors with the adjustor cap (enclosed).
Unused lens
Lens actually in use
(attach the slit to this lens)
Mutual Interference Filter (E39-E6/-E8)
A set of 4 filters are sold together for two through-beam mod-
els (for 2 each of emitters and receivers).
For mounting, refer to the figure of the slit for the E3S-A Pho-
toelectric Sensor.
Receiver
The arrow printed on the cover indicates the direction of polar-
ization. By attaching the filters opposite to each other in polar-
ization to the emitters and the receivers (refer to the figure) in
rows, mutual interference can be prevented (in any case, the
filter attached to an emitter and to the corresponding receiver
must be the same in direction of polarization or the photoelec-
tric sensor will not function).

Mounting Bracket

The direction of the optical axis coincides with the mounting
direction of the E3S when the mounting screw is inserted into
the lock hole of the mounting bracket. Unlike conventional
photoelectric sensors, if the sensing object (or the retroreflec-
tor in the case of a through-beam sensor) is in the mounting
direction of the photoelectric sensor, the object is detected
with the incident light without the time-consuming adjustment
of the optical axis (but if the mounting surface is not flat, the
adjustment of the optical axis may still be required).
Optical axis
Mounting
direction
Optical axis lock hole (M3)
Note: The maximum tightening torque applied to the screw is 5.5 kgf x cm
(0.53 N x m).
E3S-A
Arrow indicating
optical axis
position
Emitter
Be aware of the direction of
polarization.
Base of mounting
bracket
Bracket can move
in this direction

Installation of Accessories

Sensitivity Adjustor Knob (Attachment)
To temporarily use the knob to adjust the sensitivity of the
photoelectric sensor, insert side A into the shaft of the sensi-
tivity adjustor.
To permanently use the knob to adjust the sensitivity of the
photoelectric sensor, insert side B into the shaft (the knob
cannot be removed if once side B is inserted into the shaft).
Slit (E39-S46 Order Separately) for E3S-A
Use the rubber attachment with the metal cover if a slit width
of 2 mm is required. Insert the 0.5- or 1-mm slit between the
metal cover and rubber attachment if a slit width of 0.5 or
1 mm is desired. These slits fit into the rubber attachment.
2 mm
Metal cover
Slit (0.5 mm or 1 mm)
Rubber attachment
Indented portions
E3S-A
Note: Apply the slit to the lens of the photoelectric sensor marked with an arrow
indicating the position of the optical axis (apply it to the bottom lens of hor-
izontal sensors and the top lens of vertical sensors).
Optical Axis Reflector (E39-R5 Order Separately)
Use this attachment when the set distance is long and adjust-
ment is mechanically difficult with a sensing object.
Eye
Emitter
Attach the reflector to the receiver (refer to the figure).
Look at the reflector from right behind the emitter. The reflec-
tor should be bright with red light when the optical beam
strikes the reflector. If the emitter has a turbo function, the re-
flector looks brighter with the function switched on.
When the reflector is removed, the light beam strikes the re-
ceiver.
(A)
(B)
Arrow indicating position
of optical axis
E39-R5
Receiver
Optical axis
confirmation reflector
A-263