Datasheet

E3G
E3G
10
E3G-Mj(T)
Wiring
The cable with an external diameter of 6 to 8 mm is recommended.
Be sure to attach the cover with screws securely in order to maintain
the water- and dust-resistive properties of the product.
The conduit screw size is JIS B0202 PF1/2.
T erminal Cover
Do not tighten the terminal protection cover with wires pinched be -
tween
the Sensor and the cover in order to maintain the water- and
dust-resistive properties of the product.
Output
Power supply
Rubber bushing
Washer
Clamping nut
63 mm
33 mm
Terminal
protection
cover
Recommended Example
Changing to Side-pullout Cable from Vertical-
pullout Cable
Procedure
1. Remove
the present cover .
2. Attach the E39-L129 Terminal Protection Cover for
side-pullout
cable.
3. Remove the clamping nut, washer , and rubber bushing of the
E3G. These are used for the side-pullout cable.
4. Attach the rubber bushing and cap provided with the
E39-L129
to the E3G as replacements.
Rubber bushing
*
Cap*
Rubber bushing
Washer
E39-L129 Terminal
Protection Cover
Clamping nut
(1) (2)
(2)
(3)
(4)
Note: *Provided with the E39-L129.
All E3G Models
Designing
Load Relay Contact
If E3G is connected to a load with contacts that spark when the load
is turned OFF (e.g., a contactor or valve), the normally-closed side
may be turned ON before the normally-open side is turned OFF or
vice-versa. If both normally-open output and normally-closed out-
put
are used simultaneously , apply an surge suppressor to the load.
Refer to OMRON’ s PCB Relays Catalog (X33) for typical examples
of surge suppressors.
Power Reset Time
The Sensor needs 100 ms to be ready to operate after it is turned
ON. The devices connected to the Photoelectric Sensor must wait
until the Sensor is ready to operate. If the Sensor and load are con -
nected
to separate power supplies, be sure to turn ON the Sensor
first.
Power OFF
A single pulse signal may be output from the Sensor immediately
after it is turned OFF. This will occur more frequently if a timer or
counter
is connected to the Sensor and power is supplied to the tim -
er
or counter independently . Therefore, be sure to supply power to
the timer or counter from the built-in power supply of the Sensor .
Power Supply
If
a standard switching regulator is used, be sure to ground the FG
(frame ground) and G (ground) terminals, otherwise the Sensor
may
malfunction due to the switching noise of the regulator .
Repeated Cable Bending
Do not bend the sensor cable repeatedly .
High-tension Lines
Do not wire power lines or high-tension lines alongside the lines of
the Sensor in the same conduit, otherwise the Sensor may be dam -
aged
or may malfunction due to induction. Be sure to wire the lines
of the Sensor separated from power lines or high-tension lines or
laid
in an exclusive, shielded conduit.
Wiring
The E3G has a built-in function to protect the E3G from load short-
circuiting. If load short-circuiting results, the output will be turned
OFF.
In that case, check the wiring and turn ON the E3G again so
that the short-circuit protection circuit will be reset. This function will
operate if the output current flow is at least 2.0 times the rated load
current. If an inductive load is connected to the E3G, make sure that
the inrush current does not exceed 1.2 times the rated load current.
The cable can be extended up to a total length of 100 m, on condition
that the thickness of the wire is at least 0.3 mm.
Mounting
Mounting Conditions
If Sensors are mounted face-to-face, make sure that no optical axes
cross each other . Otherwise, mutual interference may result.
Be sure to install the Sensor carefully so that the directional angle
range of the Sensor will not be directly exposed to intensive light,
such
as sunlight, fluorescent light, or incandescent light.
Do not strike the Photoelectric Sensor with a hammer or any other
tool during the installation of the Sensor , or the Sensor will loose its
water-resistive properties.
Use M4 screws to mount the Sensor .
When
mounting the case, make sure that the tightening torque ap -
plied
to each screw does not exceed 1.2 N S m.