Product Details Portlet

W7ED Touch Sensor

Reliable operation that requires only a light touch.
Models equipped with anti-static FG terminals are also available.

  • Suitable for embedding in equipment
  • Enables touch sensor configurations to be created that suit your application. Touch electrodes and touch sensor electrodes can be fastened just using screws.
  • Body-to-electrode static electricity transfers can easily be prevented using FG terminal models.
  • Supports 5 to 15 VDC, with open-collector output.

 

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Application Examples

Electrode shape Appearance FG terminal Model
I-shaped Without W7ED-11F
With W7ED-12F
L-shaped Without W7ED-11L
With W7ED-12L
■ Ratings and Specifications
Detected capacitance * 25±5pF
Power supply voltage 5 VDC (-10%) to 15 VDC (+10%)
Output Open collector (max. output current: 10 mA)
Residual output voltage 0.4 V max.
Operation mode When detecting capacitance (human touch detected): Output transistor ON
When not detecting capacitance (no human touch detected): Output transistor OFF
Current consumption 10 mA max.
Voltage influence With rated supply voltage within a range of ±10% and a rate of change for detected capacitance within ±10%
when powered using the rated supply voltage
Temperature influence Within an ambient temperature range when operating and a rate of change for detected capacitance within ±10% at +23°C
Ambient temperature When in use: -10 to 60°C (no icing or condensation)
When in storage: -20 to 70°C (no icing or condensation)
Ambient humidity 25 to 85%RH
※ ”Detected capacitance” refers to the detected capacitance value when capacitance is applied between the electrode and the ground terminal of the touch sensor circuit.

■ Output Circuit Diagram

FG terminal not provided
(W7ED-11F, W7ED-11L)

 

FG terminal provided
(W7ED-12F, W7ED-12L)

*We recommend connecting the FG terminal to a stable potential on the device’s frame ground.

■ Operation Chart

Capacitance detection

 

Output transistor



   

W7ED-11F

Note: 1. Details of connector terminal symbols are shown below.
Connector terminal No. Terminal symbol Name
1 O Output (OUT)
2 G Ground (GND)
3 V Power supply (VCC)
  • 2. Compatible housings for connector include 51021-03□□ series models from Molex.
  • 3. The Lot No. is 4-digit number located at the position indicated in the figure.
  • * Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified.
 

W7ED-12F

Note: 1. Details of connector terminal symbols are shown below.
Connector terminal No. Terminal symbol Name
1 O Output (OUT)
2 G Ground (GND)
3 FG Frame ground (FG)
4 V Power supply (VCC)
  • 2. Compatible housings for connector include 51021-04□□ series models from Molex.
  • 3. The Lot No. is 4-digit number located at the position indicated in the figure.
  • *Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified.
 

W7ED-11L

Note: 1. Details of connector terminal symbols are shown below.
Connector terminal No. Terminal symbol Name
1 O Output (OUT)
2 G Ground (GND)
3 V Power supply (VCC)
  • 2. Compatible housings for connector include 51021-03□□ series models from Molex.
  • 3. The Lot No. is 4-digit number located at the position indicated in the figure.
  • * Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified.
 

W7ED-12L

Note: 1. Details of connector terminal symbols are shown below.
Connector terminal No. Terminal symbol Name
1 O Output (OUT)
2 G Ground (GND)
3 FG Frame ground (FG)
4 V Power supply (VCC)
  • 2. Compatible housings for connector include 51021-04□□ series models from Molex.
  • 3. The Lot No. is 4-digit number located at the position indicated in the figure.
  • *Tolerance class IT16 applies to dimensions in this datasheet unless otherwise specified.

 

Please read the matters of agreement when ordering

  • How to use
    By connecting and fastening this electrode to a touch electrode (conductive material made from metal or with a metallic plating), a touch sensor configuration can be created with specifications that suit your application. The electrode features a hole that enables it to be fastened with a screw, etc.
  • FG terminals
    Static electricity from the human body, etc., is capable of entering the touch sensor via its electrode. When anti-static measures are required, select a model (W7ED-12F or W7ED-12L) with an FG terminal, which acts as a discharge circuit for static electricity. To enhance the anti-static effects of the FG terminal, we recommend connecting the FG terminal to a stable potential on the device’s frame ground using a thick, short wire.

Precautions for Correct Use

  • Use a touch electrode made of conductive metal or metal-plated material.
  • Make sure to insulate touch electrode and electrode of this product from external grounds.
  • The level of capacitance normally applied will depend on conditions such as the size of the touch electrode or the existence of metal around the touch electrode. Make sure to confirm that the touch sensor operates by applying human touch to the touch electrode with the touch electrode secured in place while in contact with the electrode of this product.
  • Avoid use in locations subject to direct contact with liquids such as water. Failure to do so will result in malfunction.