NL1-C Omron, NL1-C Datasheet - Page 6

• Manufacturer Part Number: NL1-C
• Description: TOUCH SWITCH
• Manufacturer: Omron
• Series: NLr
• Type: Capacitiver

Specifications of NL1-C

• Sensitivity: -
• Response Time: 5ms
• Interface: -
• Channel Inputs: 1
• Voltage - Supply: 12V
• Actuator Type: Coil Spring w/Built in Antenna
• Package / Case: -
• Lead Free Status / Rohs Status: Details

Safety Precautions
Refer to Safety Precautions for All Limit Switches.
Make sure that the antenna does not come into contact
with the human body, otherwise an electric shock may
be received.
Antenna Grounded through Sensing Object
<Size of Sensing Object>
<Conditions of Sensing Object>
• Grounded Object
• Non-grounded Object
• The detection of conductors (e.g., iron, stainless steel, aluminum,
• Non-conductive objects (e.g., plastic, ceramic, glass, and cloth
and brass objects) poses no particular problem. A conductor
coated with paint cannot be detected, however, because there is no
electrical continuity between the antenna and the conductor.
objects) can be detected by grounding them indirectly.
Contact with Grounded Conductor
The sensing object is equivalently grounded through ground resistor R.
R: 3 kΩ max.
The sensing object must not come into contact with the human body.
Contact with Non-grounded Conductor
The sensing object is equivalently grounded through capacitor C.
C: 100 pF min.
If the sensing object is the following grounded conductor, its size
will not affect the operation of the NL. Check for the presence of
insulators sticking to the sensing object or the corrosion of the
sensing object, however, so that the ground resistance will not
exceed 3 kΩ.
If the sensing object is the following non-grounded conductor, the
NL will operate if the capacitance between the sensing object and
the ground is 100 pF or more. The larger the surface area of the
sensing object is, the higher its capacitance will be. The shorter the
distance between the sensing object and the ground is, the higher
the capacitance will be. Furthermore, the capacitance greatly
varies with the ground condition (e.g., dry sand, concrete, or wet
soil).
100 pF min.
C
Non-grounded
Precautions for Correct Use
conductor
3 k max.
Generally, the conductor will
be detectable if the ambient
humidity is 60% to 70%RH and
the surface area of the conductor
is approximately 300
CAUTION
R
Grounded
conductor
500 mm.
Antenna
<Shape and Extension>
If a metal plate is used as an antenna by connecting it to the built-in
or separated antenna of the NL, the surface area of the metal plate
must be 200 cm
that the total length of the antenna is 1 m maximum and that the
bottom of the antenna is at least 10 cm away from the ground. Refer
to the illustrations below.
Antenna Connection
To connect a suitable antenna to the high-frequency coaxial cable of
the NL@-S, perform the following steps.
Braided Shield
Fig. 1
Antenna
• The shield is connected to the casing of the NL. Pay the utmost
• If the antenna cable needs to be extended, use the separated
attention so that the conductor connected to the antenna will not
come into contact with the shield. Secure the shield with insulation
tape.
antenna model. Do not use a standard cable in place of the high-
frequency coaxial cable.
NL
200cm
Metal plate
Soldering
Correct
Incorrect
2
max.
Antenna
High-frequency
coaxial cable
2
maximum. The antenna can be extended, provided
Fig. 2
1
NL
Installation
Installation
Conductor
2
Antenna
Screwing (I)
6
3
4
1
+ ---
5
High-frequency coaxial cable
6
NL (separated
antenna model)
Standard cable
1 m
High-frequency
coaxial cable
Braided shield
NL
Insulation tape
Fig. 3
Antenna
1 m max.
10 cm min.
Screwing (II)
Ground
High-frequency
coaxial cable
NL
NL
6