Omron E3X-NV User manual


Fiber-Optic Amplifier E3X-NV/NVG
A Water-resistant Amplifier with a
Green Light Source Ideal for Label
and Packaging Industries
The E3X-NVG uses a green light source
to detect colors that cannot be detected
using sensors with red light sources
The E3X-NV incorporates a red light
source
Teach function with No-Object Teaching
capability speeds setup
Rated IP66: can withstand light
washdown
Remote teach function allows easy
remote teaching from the controller
Mounts on DIN rail track
Uses E32-series fiber-optic cables
(Refer to the E32 fiber-optic data sheet.)
Ordering Information
AMPLIFIER UNITS
Light source Appearance Connections Output Part number
Green LED
33 2
Pre-leaded NPN open collector E3X-NVG21
Red LED 33.2
12 59 E3X-NV21
REPLACEMENT PART
Description Part number
Mounting bracket supplied with sensor E39-L48

E3X-NV/NVG E3X-NV/NVG
2
Specifications
RATINGS/CHARACTERISTICS
Amplifier
Part number E3X-NV21 E3X-NVG21
Supply voltage 12 to 24 VDC 10%, ripple (p-p) 10% max.
Current consumption 50 mA max.
Light source (wavelength) Red LED (680 nm) Green LED (565 nm)
Required fiber-optic cables For compatibility, see “DIN-rail Amplifiers” in the E32 fiber-optic data sheet.
Control output NPN open collector, load current: 100 mA; residual voltage 1 V max.
Operation mode Light-ON/Dark-ON, switch selectable
Circuit protection Reverse polarity, output short-circuit
Response time 500 s max. at rated detection distance
Sensitivity setting Automatically set during Teaching function
Timer function OFF-delay timer (fixed at 40 ms); timer function can be disabled by switch setting
Indicators Orange LED Lit during output operation
Green LED Lit with stable light reception or no light
Teaching function Remote input Remote input is ON when pink and blue wires short-circuited
Remote input is OFF when pink and blue wires are not shorted
Confirmation Red/green LED indicators and buzzer
Enclosure rating IEC IP66 with protective cover in place
IEC IP65 with amplifier is connected to a fine fiber sensor, a heat-resistant sensor
(E32-T61, E32-D61 or E32-D73), an armored sensor, and E32-M21.
IP50 without the protective cover
Connections Pre-leaded 2 m (6.56 ft) cable
Weight Approx. 100 g
Material Case Heat-resistant ABS
Cover Polycarbonate
Ambient illumination Sunlight 10,000 lx max.
Incandescent lamp 3,000 lx max.
Ambient operating temperature –25°C to 55°C (–13°F to 131°F) with no icing
Relative humidity 35% to 85% with no condensation
Insulation resistance 20 MW min. at 500 VDC
Dielectric strength 1,000 VAC, 50/60 Hz for 1 min
Vibration resistance 10 to 55 Hz, 1.5-mm double amplitude or 300 m/s2(approx. 30 G) for 2 hrs each
in X, Y, and Z axes
Shock resistance 500 m/s2(approx. 50G) for 3 times each in X, Y, and Z axes

E3X-NV/NVG E3X-NV/NVG
3
LIGHT SOURCE COLOR SELECTION
To distinguish two colors, select a light source color that creates a
large difference in the reflection rate between the two colors.
Reflection Rates
Refer to the following table to select the best light source color to dis-
tinguish colors.
Red Light Source
(E3X-NV) Green Light Source (E3X-NVG)
Reflection rate Reflection rate
White Red Green Black White Red Green Black
Colors to be
di ti i h d
Light source
distinguished Red Green
White – Red Yes
White – Green Yes
Red – Green Yes
Black – Red Yes
Black – Green Yes
White – Black Yes Yes
Operation
OUTPUT CIRCUITS
Brown
Black
Blue
Load
Operation
indicator
(orange)
Stability
indicator
(green)
Teaching indicator
(red/green)
Control
output 12 to
24 VDC
Remote
teaching input
Pink
Main
circuit
Timing Chart
Light-ON Dark-ON
Incident
Interrupted
Operation
indicator
(orange)
ON
OFF
Output
transistor
ON
OFF
Load
(relay)
Operates
Releases
(Between brown and
black terminals)
(Between brown and
black terminals)
Operation
indicator
(orange)
Output
transistor
Load
(relay)
E3X-NV21/NVG21
Incident
Interrupted
ON
OFF
ON
OFF
Operates
Releases
WITH/WITHOUT-OBJECT TEACHING, NO-OBJECT TEACHING, MAXIMUM SENSITIVITY SETTING
Refer to the following table to select the most suitable sensitivity setting method.
Sensitivity setting method Maximum sensitivity setting No-object teaching With/Without-object teaching
Typical application Detection of the existence of
objects that interrupt light
perfectly
Detection of objects with no
background objects
If teaching is impossible by
stopping the movement of
detectable objects
To detect bright or dark objects
by teaching only with background
objects
Detection of a slight difference in
reflection
Color discrimination
Background objects with
unstable reflection
Detection of object surface
irregularities
Elimination of background object influence
Note: If the set distance is very short (i.e., 0 to 12 mm for the E32-TC200 and 0 to 4 mm for the E32-DC200), no-object teaching is not possible
due to excessive light. In this case, perform with/without-object teaching.

E3X-NV/NVG E3X-NV/NVG
4
NO-OBJECT TEACHING WITH AN INITIAL OPERATING LEVEL COMPENSATION FUNCTION
With Diffuse (Light-ON) Fiber
1. Teaching button is pressed once. 2. The first detectable object is in the detectable area.
3. Detectable objects continue to pass through the sensing area.
Operating level
10%
ON
OFF
0
Large
Small
Operating level
Set the operating level to
±10% of the light level.
Operating level
Large
Small 0
Light level of
background
The light level increases and the
photoelectric sensor works in re-
flective operation.
10%
10%
Considering the detectable object positions and the color differences
of detectable objects, sample the light of the first to fifth objects. Then
reset the operating level to the median value between the lowest light
with a detectable object and the light without a detectable object.
Large
Small 0
(1) (2) (3) (4) (5) (6)
Resetting
Operating level
Light Light
Light
Note: If the light value up to the fifth object is at least twice
as large as the operating level, the initial set operat-
ing level (10%) will be maintained.
Change to
RUN mode
With Through-beam (Dark-ON) Fiber Unit
1. Teaching button is pressed once. 2. The first detectable object is in the sensing area.
00
Large
Small
Operating level
Operating level
10%
ON
OFF
Large
Small
Light level with
no object
Set the operating level to
±10% of the light level.
The light value decreases and
the photoelectric sensor works
in through-beam operation.
Operating level
10 %
10 %
Light Light
Change to
RUN mode
3. Detectable objects continue to pass through the sensing area.
Large
Small 0
(1) (2) (3) (4) (5) (6)
Considering a drop in light value due to optical axis divergence or dust
on the lenses, sample the light of the first to fifth objects. Then reset the
operating level to the median value between the lowest light with a de-
tectable object and the light without detectable object.
Resetting
Operating level
Light
Note:1. After no-object teaching, when the E3X-NVis turned off and on, the operation level will be set to the +10% of the initial light
level (refer to the above (1)) in reflective operation and –10% of the initial light level in through-beam operation and stand by.
2. After performing no-object teaching and changing to RUN mode, until the first detectable object is in the sensing area, the control
output will be prohibited (OFF). The control output will be determined when the first detectable object is detected.
3. The initial operating level compensation function will operate after teaching and/or after the E3X-NVis turned on.
4. During no-object teaching, after the E3X-NVis in RUN mode, the E3X-NVrequires approximately 60 ms to determine the oper-
ating level from the time the first detectable object is in the sensing area. After the operating level is determined, the E3X-NVwill
operate with a normal response speed of 500 µs.

E3X-NV/NVG E3X-NV/NVG
5
REMOTE TEACHING
Remote Teach Function
In principle, the remote teach function of the E3X-NVshould be used for initial teaching. Basically, the method of remote teaching is the same
as that of sensitivity setting. In remote teaching, instead of pressing the teach button, teach is performed with a remote teach input signal.
1. Set the mode selector to RUN.
2. The following signal conditions must be given as remote teaching input conditions.
3. If remote teaching is not performed, cut the pink wire at the base or connect the pink wire to the +V terminal.
4. After the remote teaching input setting is finished, the E3X-NVwill be ready to detect objects in approximately one second.
Brown +V
Black
Control output
Pink
Blue 0 V
Power supply ON
OFF
Remote teach input With/Without-object teaching H
L
T1T2T1
T1: 0.5 to 2 s T2: 3 s min.
Maximum sensitivity setting H
L
T3
T3: 5 s min.
No-object teaching H
L
T4T5T4
T4: 0.5 to 2 s T5: 1.5 to 2 s
OPTICAL AXIS ADJUSTMENT (FLASHING FUNCTION)
Set the mode selector of the E3X-NVto TEACH. The flashing function of E3X-NVwill be activated. When the optical axes of the fiber heads
are divergent and the light value decreases by approximately 10% of the maximum value, the tip of the emitting fiber will start flashing and the
built-in buzzer will beep. At this time, if the optical axes are divergent, adjust the axes. The peak light value will be memorized by the E3X-NV.
Do not press the teach button before or while adjusting the optical axes, or the flashing function will not operate.
Fiber for light emission Fiber for light reception
Light reception
The peak of light reception
90% of the peak value Lit in this range.
Angle of the head (θ)
Flashing Lit Flashing
θ

E3X-NV/NVG E3X-NV/NVG
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Dimensions
Unit: mm (inch)
E3X-NV
E3X-NVG
Two, 2.4 dia.
Operation indicator
Stability indicator
Two, 3.2 dia. holes Mounting bracket (removable)
Teaching indicator
Cord: Polyvinyl chloride-covered cable
4-mm dia., 4 cores
Standard length: 2 m
17.8
(0.70)
12
(0.47)
1.2
(0.05)
32
(1.26) 25
(0.98)
59
(2.32)
9
(0.35)
11
(0.43)
(0.16)
22.5
(0.89)
13
(0.51)
16
(0.63) 37
(1.46)
22.5
(0.89)
3.4
2
(0.08)
16
(0.63)
6
(0.24) 3.9
(0.15)
0.4 12.5
(0.49)
8.4
(0.33)
8
(0.31)
4
59
12
33.2
Installation
CONNECTION
Connection with S3D2 Sensor Controller Connection with S3D8 Sensor Controller
Note: A maximum of two E3X-NVSensors can
be connected. Note: 1. The E3X-NVwill switch to reverse operation by pressing the L Key.
2. A maximum of eight E3X-NVSensors can be connected.
+12 V
Blue
Black
Brown
IN1
+12 V 0 V
Blue
Black
Brown 0 V
IN1

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E3X-NV/NVG E3X-NV/NVG
7
Caution
FIBER UNIT
Fiber Optic Cable
Connection and Disconnection
The E3X-NVamplifier has a push lock. The fiber must be locked
or released in a temperature range of –10°to 40°C. Connect or dis-
connect the fibers to or from the E3X-NVamplifier using the fol-
lowing procedures:
Connection
Locked Unlocked
After inserting the fiber optic cable into the Unit, push down the lock
lever to secure it.
After cutting the fibers with the Fiber Cutter (E39-F4), place an in-
sertion mark on the fiber so that it can be properly inserted into the
Amplifier. Insert the fiber into the Amplifier up to this insertion mark.
Disconnection
Push up the lock lever so that the fiber optic cable can be removed.
To avoid damage, make sure that the fiber is unlocked before re-
moving.
AMPLIFIER
Mounting
1. Mount the front part on the mounting bracket (sold together)
or on a DIN rail.
2. Press the back part onto the mounting bracket or on to the
DIN rail.
Note:To assure mounting strength: Do not mount the back part
onto the mounting bracket or the DIN rail first before mount-
ing front part on the mounting bracket or the DIN rail.
(1) (2)
DIN rail
For side mounting, attach the mounting bracket on the amplifier first,
and secure the amplifier with M3 screws and washers. The diameter
of the washers should be 6 mm max.
Washers
(6 dia. max.)
Removal
For removal, pull back the gray rail on the rear bottom with a flat-
blade screwdriver so that the amplifier can be removed easily.

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E3X-NV/NVG E3X-NV/NVG
Precautions
WARNING
AVOID EXPLOSION OR FIRE
The voltage supplied to the E3X-NV/NVG must be within
the rated voltage range. If a voltage exceeding the rated
upper limit is imposed on the E3X-NV/NVG.
Connect each power line of the E3X-NV/NVG correctly.
Do not short-circuit the load connected to the E3X-NV/NVG.
TURNING POWER ON
After the E3X-NVis turned on, it will be ready to operate in 100 ms
maximum. If power is supplied to the E3X-NVand the load is con-
nected to the E3X-NVindependently, be sure to turn on the power
supply connected to the E3X-NVfirst.
When the E3X-NVis turned on or off, no control output will be ON,
even though the operation indicator of the E3X-NVwill be lit for an
instant.
MUTUAL INTERFERENCE PROTECTION
FUNCTION
When closely connecting two to three Fiber Units to more than one
E3X-NV, perform with/without-object teaching on a single E3X-
NVat a time. Turn on only the E3X-NVon which teaching is per-
formed. If all the E3X-NVare turned on, interrupt the emitters of
the Fiber Units on which teaching is not performed.
Power interruptions or noise caused by static electricity, etc., can re-
sult in write errors during any part of the teaching process. These
errors include buzzers, lighting of teaching indicators, simultaneous
flashing of red/green indicators, lighting of operation indicators, and
lighting or flashing of stability indicators. If any of these occur, re-in-
put teaching using the teaching button on the Amplifier.
Unlike experiencing teaching errors, if any memory error occurs,
red/green teaching indicators will flash simultaneously, and opera-
tion indicators and stability indicators will also flash.
WHEN POWER IS OFF
The instant power is turned off, the E3X-NVcould output a pulse
signal which could affect the operation of the devices connected to
it. This will happen more often if power is supplied to the E3X-NV
from an external power supply, thus affecting the connected timer
and counter. Use a built-in power supply to avoid this.
CABLE
To extend the cable, use a wire with 0.3 mm2min. The total length of
the cable should be 100 m max.
POWER SUPPLY
If a standard switching regulator is used as a power supply, the
frame ground (FG) terminal and the ground (G) terminal must be
grounded, or the E3X-NVcan malfunction, influenced by the
switching noise of the power supply.
The supplied voltage must be within the rated voltage range. Unreg-
ulated full- or half-wave rectifiers must not be used as power sup-
plies.
INSTALLING/WIRING
Do not wire the amplifier in the same conduit with power lines. Doing
so would cause induction between the lines, possibly resulting in
faulty operation or destruction. Always provide separate conduit for
the wiring to the amplifier.
Power line
Cat. No. CEDSAX3 10/99 Specifications subject to change without notice. Printed in U.S.A.
OMRON ELECTRONICS, INC.
One East Commerce Drive
Schaumburg, IL 60173
NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
1-800-55-OMRON
OMRON CANADA, INC.
885 Milner Avenue
Scarborough, Ontario M1B 5V8
416-286-6465


Mouser Electronics
Authorized Distributor
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E39-L48