Instantaneous operation upon contact with extremely
limited hysteresis for high-precision position detection.
•
Detects minute displacement or lightweight objects with
minimal operating force.
•
Built-in LED indicator ensures easy operation monitoring.
•
DC models provide versatile functions in combination
with the S3D2 Sensor Controller.
CSM_NL_DS_E_2_2
Be sure to read
Safety Precautions
on page 6 to 7 and
Safety Precautions for All Limit Switches.
Application Examples
· Detection of press completion position.
· Detection of mistakes in workpiece
setting or removal.
· Detection of minute workpieces.
Press
· Drill positioning.
· Material positioning.
· Detection of workpiece edges.
Workpiece
NL
NL
Paper (cloth)
NL
Grounding
rod
NL
NL
(Ground)
Grounding
rod
· Displacement detection and control.
Pressure
· Thickness control of rolling plates.
· Detection of paper or cloth edge
(using indirect grounding).
NL
Paper (cloth)
NL
Roller
Ground side
Bellows
· Detection of paper or cloth seam
(using indirect grounding).
Controller
Unit
NL
Controller
Unit
Motor
NL
NL
Grounding rod
Paper (cloth)
1
NL
Ordering Information
Built-in Antenna Model
Model
Features
· Provides sufficient OT (overtravel).
· Antenna tip withstands bending.
Coil spring
Built-in antenna model
· Ensures high-precision positioning control.
· OT of 5-mm max. (overtravel)
Plunger
Antenna
Series
NL1
NL2
NL3
Power supply voltage
12 VDC
24 VDC
100 VAC
200 VAC
Model
NL1-C
NL2-C
NL3-C 100V
NL3-C 200V
NL1-C ANTENNA ASSY (Same for NL1, NL2, and NL3)
Model
NL1-P
NL2-P
NL3-P 100V
NL3-P 200V
Antenna only
---
Note: Each model is provided with a standard 1-m cable.
Separate Antenna Model
Model
No antenna
Separate antenna model
Plunger
with antenna
Coil spring with antenna
Features · Antenna with 3-m extension cable is available for narrow spaces where conventional limit switches cannot be used.
Antenna
Series
NL1
NL2
Power supply voltage
12 VDC
24 VDC
Model
NL1-S
NL2-S
Model
NL1-SP
NL2-SP
Model
NL1-SC
NL2-SC
NL1-SC ANTENNA (Same for NL1 and NL2)
Antenna only
Note: Each model is provided with a standard 1-m cable.
---
---
Specifications
Item
Supply voltage
Rated frequency
Sensitivity
Current consumption
Leakage current
Response time
Output signal
Insulation resistance
Dielectric strength
Pollution degree
(operating environment)
Protection against
electric shock
Switch category
Vibration resistance
Shock resistance
Ambient temperature
Ambient humidity
Weight
5 ms max.
Voltage output model: 30 mA at
12 VDC with output
impedance of 4.7 kΩ
0 V (blue lead wire) is connected to casing
0 V (blue lead wire) is connected to casing
3 (IEC947-5-1)
Class II
Current output model:
24 VDC (directly switching
resistive load of 170 mA max.)
Model
IP60
12 VDC
24 VDC
---
Grounded object: Contact resistance of 3 kΩ max.
Non-grounded object: Antenna-to-ground capacitance of 100 pF min.
8 mA
15 mA
---
20 ms max.
Thyristor output model:
100 or 200 VAC (directly switching resistive
load of 30 to 300 mA)
*2
100 MΩ min. at 500 VDC
*3
1,500 VAC at 50/60 Hz for 1 min
*3
---
Circuit: 2 mA; Antenna: 1 mA
*1
100 VAC or 200 VAC
50/60 Hz
NL1
NL2
NL3
Degree of protection
Proof tracking index (PTI)
175
D (IEC335)
10 to 55 Hz, 1.5-mm double amplitude
200 m/s
2
max.
−10°C
to +60°C (with no icing)
35% to 95%RH
Approx. 370 g (NL@-C, -P) Approx. 550 g (NL@-S) Approx. 680 g (NL@-SP, -SC)
*1. The NL3 has a capacitor and resistor for the protection of the built-in SCR. Therefore, the NL3 has leakage current.
*2. The NL3 requires a current of 30 mA for circuit protection.
Red (Brown)
i
If the load current is less than 30 mA, connect the bleeder resistance R in
Load
White
parallel with the load as shown below so that the total current of the load circuit will be 30 to 300 mA.
(Black)
Obtain R from the following formula.
R
NL3
Black (Blue)
V
R=
(kΩ)
30
−
i
Make sure that the permissible power of the resistor is sufficient.
*3. Between current-carrying and non-current-carrying metal parts
Power supply
100 VAC
(200 VAC)
2
NL
Structure and Nomenclature
Nomenclature
Coil spring antenna
Antenna assy
Head
O-ring
LED operation
indicator
Rubber packing
Cover
(not removable)
Mounting hole
(with mounting pitch
conforming to DIN standards)
SC connector
(not removable)
Cable
Principle of Operation
The Limit Touch Switch
constantly emits a high
frequency. If an object
comes in touch with the
touch antenna, ..
Constants of the
oscillation circuit
will change and
oscillation will stop.
Feedback
circuit
Antenna
Oscillation
circuit
Wave detec-
tion circuit
NOT circuit
S3D Sensor
Power Supply
100 VAC
(200 VAC)
Switching circuit
will operate and
send out output
signals.
Applicable to a variety of
purposes in combination
with a dedicated sensor
power supply.
Classification by Series and Features
NL1
12 VDC Sensor
power supply
NL1
The S3D2 Controller is available
and has a variety of functions,
thus ensuring ease of use.
Load
Power supply
S3D2:
100 to 240 VAC
NL2
NL2
Load (24 VDC, 170 mA)
L/R=0
NL3
Load with 30 to 300 mA
(cos
φ
= 1) at 100/200 VAC
Connects to 100/200 VAC
power supply and directly
switches AC loads.
Power supply
100 VAC
(200 VAC)
NL3
The NL2 with 24 VDC can
directly switch the load.
Applicable model
NL1
NL2
Sensor Controller
S3D2-AK
S3D2-BK
S3D2-CK
S3D2-AKD
S3D2-CKD
Function
Basic operation
Memory and timer operation
Timer operation
Basic operation
Timer operation
Power supply voltage
100 to 240 VAC
24 VDC
Contact your OMRON representative for the datasheet of the S3D2.
3
NL
Connections
Output Circuit Diagrams
NL1
Brown (Red)
+12 VDC
NL2
Brown (Red)
+24 VDC
NL3
Brown (Red)
Black Load
(White)
100 VAC, 200 VAC
Output
4.7 kΩ
Switch
main
circuit
Black (White)
Output
Switch
main
circuit
2.2
Ω
Black Load
(White)
Output
Switch
main
circuit
0V
Blue (Black)
0V
Blue (Black)
Blue (Black)
Note: The 0-V power supply side will be connected to the casing if the model is the NL1 or NL2.
External Connection
Sensor Power Supply (S3D2)
The use of the S3D2 is recommended for supplying 12 VDC to the
NL2 (or 24 VDC to the NL2) and converting the output of the NL into
relay or open collector output in versatile timing control. The NL3 does
not require a sensor power supply.
Applicable model
Sensor Controller
S3D2-AK
NL1
S3D2-BK
S3D2-CK
S3D2-AKD
S3D2-CKD
Power supply
voltage
Basic operation
Memory and timer
operation
Timer operation
Basic operation
Timer operation
NL2
S3D2 Controller Unit
Be sure to wire the cable correctly according to the color of each lead wire. Do not wire power lines or high-tension lines alongside the
cable.
The use of S3D2 is recommended as a power supply to the NL1. Contact your OMRON representative for the datasheet of the S3D2.
NL1
+12 VDC Brown (Red)
OUT Black
(White)
0 V Blue
(Black)
NL2
Blue (Black)
Black
(White)
(Output)
Brown
(Red)
Black
(White)
Blue
(Black)
Blue (Black) *
External circuit
* Ground the blue (black) wire.
A maximum DC load of 170 mA
(with no inductance or resistance).
Can be switched directly.
24 VDC
Load
0V
7
10
IN1
8
11
9
12
IN2
NL3
Brown (Red)
Black
(White)
(Output)
Blue (Black) *
External circuit
* Be sure to ground the blue (black)
line of the NL3.
A maximum AC load of 300 mA
(cos
φ
= 1).
Can be switched directly.
NORM INV
4
1
5
2
6
3
Load
100 VAC or
200 VAC
S3D2-AK
Note: 1. The lead wire colors of the NL have been changed in compliance with the latest applicable JIS standards. Colors in parentheses are previous ones.
2. The figures in the S3D2 illustration indicate the terminal numbers of the socket.
3. Use a three-conductor cable with a minimum thickness of 0.75 mm to connect the NL and the Sensor Power Supply or other devices with no built-in contacts.
The cable can be extended up to 100 m on condition that the cable is wired in an independent conduit.
4
NL
Dimensions
Built-in Antenna Models
Coil Spring
NL1-C
NL2-C
NL3-C
Plunger
NL1-P
NL2-P
NL3-P
31 12.5
(Unit: mm)
1.2 dia. *1
5.3 dia.
110
±
2
(15)
55
12.5
1
Two,
5.3
±
0.12
dia.
holes
LED operation
indicator
8
25 max.
Two, 5.3-dia.
long holes
(7.3)
15
30
±
0.2
40
±
0.8
*2
Caution label
15
30
43.7
±
0.8
6.5
±
0.8
25.8
16
6 dia. *1
5 *2
Two,
5.3
+
0.12
dia.
holes
16
1
(99)
75 60
±
0.2
±
0.2
75 60
8
25 max.
Two, 5.3-dia.
long holes
(7.3)
*3
Caution label
7-dia. Connection
cable (1 m)
5
15
30
+0.2
40
+0.8
15
30
43.7
+0.8
7-dia. Connection
cable (1 m)
5
*1. The coil spring antenna is movable in any direction. Make sure
that the angle of the antenna is within 30° to the FP (free position)
after the antenna comes into contact with the object.
*2. Use after removing the caution label.
*1. The stainless-steel plunger antenna allows a maximum
OT (overtravel) of 5 mm.
*2. This position is the FP (free position) of the plunger.
*3. Use after removing the caution label.
Note: 1. The force that pushes the actuator must not exceed 1.96 N.
2. The antenna is replaceable. Contact your OMRON representative for
details.
Note: Do not apply a force greater than 9.8 N to the plunger.
Separated Antenna Models
The dimensions provided for the NL1-SP, NL2-SP, NL1-SC, and NL2-SC are the external dimensions for the antennas. The casing
dimensions of these models are all the same as those for the coil spring or plunger models.
No Antenna
NL1-S
NL2-S
16
Plunger Antenna
NL1-SP
NL2-SP
35
(10.5)
8
*3
7 dia. *1
31
22.5
6
5 *2
*1
6 dia.
R16
51
Two, M22 x 1
mounting nuts
Distance to
opposite side: 26
thickness: 4
t 2.3
(2.3R)
12
20
4.5
16
±
0.2
32
16
35
±
0.5
1
(27)
Two,
5.3
±
0.12
dia.
holes
LED operation
indicator
Two, 5.3-dia.
long holes
(7.3)
(
)
*1. The stainless-steel plunger antenna
allows a maximum OT (overtravel)
of 5 mm.
*2. This position is the FP
(free position) of the plunger.
*3. A standard 3-m high-frequency
coaxial cable is provided.
(95)
75 60
±
0.2
Note: 1. Do not apply a force greater than 9.8 N to the plunger.
2. Do not cut or extend the connecting cable.
8
25 max.
7-dia. Connection
cable (1 m)
5
15
30
±
0.2
40
±
0.8
*2
Caution label
Coil Spring Antenna
NL1-SC
NL2-SC
15
30
43.7
±
0.8
90.5
±
2
31
22.5
40.5
±
2
6
3.5
*1. The coil spring antenna is movable in any
direction. Make sure that the angle of the
antenna is within 30° to the FP (free position)
after the antenna comes into contact with the
object.
*2. A standard 3-m high-frequency coaxial
cable is provided.
(10.5)
8
*1. A standard 3-m high-frequency coaxial cable is provided.
*2. Use after removing the caution label.
*2
1.2 dia. *1
Note: 1. Make sure that the shape of the antenna is suitable to the application.
Use the plunger antenna or coil spring antenna as shown right for the
NL1-S or NL2-S.
2. Do not cut or extend the connecting cable.
Note: Unless otherwise specified, a tolerance of
±0.4
mm applies to all dimensions.
Note: 1. Do not cut or extend the connecting cable.
2. The antenna is replaceable. Contact your OMRON representative for
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