NT20S-KBA01 Omron, NT20S-KBA01 Datasheet - Page 152

• Manufacturer Part Number: NT20S-KBA01
• Description: CHEM RESISTANT CVR FOR NT21
• Manufacturer: Omron

Specifications of NT20S-KBA01

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Touch Switches
Touch Switches
Caution:
Reference: Caution on pressing touch switches at 3 points
The NT20S has a function whereby input operations can be performed by using
touch panels displayed on the screen. NT20S screens can be switched, or bit in-
formation sent to the Host, by pressing (lightly touching) the “touch switches” in a
panel.
The touch switches can also be made to light up (or flash) and go off like lamps.
Touch switches are set when creating the screen data with the support tool.
This section describes the touch switches that can be displayed, and explains the
screen switching function and the system key function.
For details on how the status of the currently displayed touch switch is notified to
the Host, refer to “Lit (Flashing) and Unlit Touch Switch Statuses (Changing the
Status of Allocated Bits)” on page 183, “Lamp and Touch Switch Display (Bit Spec-
ification)” on page 210, and “Lamp and Touch Switch display (Number Specifica-
tion)” on page 210.
For details on how the statuses of touch switches are ascertained by the Host, re-
fer to “Notifying the Host that a Switch has been Pressed (Determining Touch
Switch Status)” on page 183, and “Lamp and Touch Switch Display Status Enqui-
ry” on page 211.
S Do not use input functions such as PT touch switches for applications where
S Press touch switches with a force of no greater than 30 N.
S Do not press touch switches carelessly while the backlight is off or while nothing
S If touch switches are pressed in rapid succession, their inputs may not be suc-
When multiple touch switches are created at the relative positions indicated in the
example below, malfunctions may occur due to the characteristics of this switch
configuration.
Example 1: When switches are created at positions A and B and at the points
where the vertical and horizontal lines extending from these two points intersect,
i.e. points C and D:
danger to human life or serious property damage is possible or for emergency
switch applications.
is displayed on the screen. Otherwise the system may operate unpredictably.
Only press touch switches after confirming system safety.
cessfully received.
Confirm that the input of a touch switch has been successfully received before
moving on to the next operation.
Smallest touch switch frame
D
A
C
B
S
S
When switches A, B, and C are switched on at
the same time, switch D is also assumed to have
been switched on due to the configuration of the
touch switches.
When switches A, B, and D are switched on at the
same time, switch C is also assumed to have
been switched on due to the configuration of the
touch switches.
Section 4-7