Thumbwheel Switch
A7AS
Refer to
Warranty and Application Considerations
(page 1) and
Safety
Precautions
(page 3).
General-purpose Thumbwheel Switches
• A wide range of output codes are available.
• Use the back-mounting (screw-mounting) models to achieve a
compact panel design.
Model Number Structure
■
Model Number Legend
A7AS-@@@-@
1 2
3
1. Mounting Method
2:
Snap-in (front mounting)
2. Output Code Number
03:
Decimal code output
06:
Binary coded decimal output
07:
06 with component-adding provision
19:
03 with component-adding provision
3. Unit Color
None: Light gray
1:
Black (See note 2.)
Thumbwheel Switch
A7AS
51
Ordering Information
■
List of Models
Push-operated Switches
Model
Classification
(See note 1.)
A7AS
Snap-in
Terminals
Output code number
03 (decimal code)
06 (binary coded decimal)
07 (binary coded decimal, with component-adding provision)
(See note 5.)
19 (decimal code, with component-adding provision)
Color
A7AS-203
A7AS-206
A7AS-207
A7AS-219
Solder terminals
Light gray
Black
A7AS-203-1
A7AS-206-1
A7AS-207-1
A7AS-219-1
Note: 1.
The classification diagrams show 4 Switch Units combined with End Caps to create 4-digit displays.
2.
The model numbers given above are for 1 Switch Unit.
3.
Models with stoppers are also available. Add “-S@@” after the “103,” “106,” “107,” “119,” “203,” “206,” “207,” or “219” in the model number
and specify the display range in the
@@.
For example, to specify the range 0 to 6, add “-S06” to the model number (e.g., A7AS-203-S06-1).
4.
Models with +,
−
displays can also be produced. Add “-PM” after the “106” or “206” in the model number.
5.
Models with diodes are available. Add “-D” to the model number.
Accessories (Order Separately)
Use accessories, such as End Caps, Spacers, and Connectors with the Switch Units.
End Caps
Classification
Accessory
End Caps
Spacer
Color
A7AS-M
NRT-P@ (See note.)
Light gray
A7AS-M-1
NRT-P@-1 (See note.)
A7AS
Black
Note:
The
@
in the Spacer model number stands for the engraved symbol.
Connectors
Model
Type
Solder terminals
PCB terminals
NRT-C
NRT-CP
A7AS
■
Ordering Procedure
Place orders as shown in the example below, specifying the model
and number.
Spacers
Symbol
Stamp
A
B
C
MIN
D
H
E
g
F
kg
G
mm
H
SEC
No
desig-
nation
H
cm
J
m
Symbol
Stamp
K
L
PCS
Q
x 10
SEC
T
0
U
•
1.
2.
3.
4.
°
C
1
2
3
4
1
A7AS-M (End Caps): 1 pair
A7AS-203 (Switch Unit): 3
NRT-PD (Spacer): 1
A7AS-206 (Switch Unit): 3
52
Thumbwheel Switch
A7AS
Specifications
■
Characteristics
Item
Switching capacity (resistive load)
Continuous carry current
Contact resistance
Insulation
resistance
Between non-connected
terminals
50 VAC or 28 VDC
1 mA to 0.1 A
1 A max.
300 m
Ω
max.
10 M
Ω
min. (at 500 VDC)
A7AS
Between terminal and
100 M
Ω
min. (at 500 VDC)
non-current carrying part
Dielectric
strength
Between
600 VAC, 50/60 Hz for 1 min
non-connected terminals
Between terminal and
1,000 VAC, 50/60 Hz for 1 min
non-current carrying part
Vibration
resistance
Shock
resistance
Durability
Malfunction
Malfunction
Mechanical
Electrical
Ambient temperature
(with no icing)
Ambient humidity
Max. operating force
10 to 55 Hz, 1.5-mm double amplitude
490 m/s
2
min.
1,000,000 operations min.
50,000 operations min.
Operating: –40
°
C to 85
°
C
Storage: –40
°
C to 85
°
C
Operating: 45% to 85%
3.92 N max.
Thumbwheel Switch
A7AS
53
■
Output Codes/Terminals
How to Read Output Codes
Example for A7AS with Output Code 06
For example, when the dial position is “3,” the common terminal C on the Switch is connected to terminals 1 and 2. When the Switch is inserted
into the Connector, the common terminal C becomes connector terminal 3, and terminals 1 and 2 become connector terminals 5 and 7 respectively.
Output Code 03 (Decimal Code)
Model
Switch Unit Common
or
Connector
terminal
number
Terminals connected to common
Output Codes 07 (Binary Coded
Decimal with Component-adding
Provision) and 36 (See note 1.)
9
Model
Switch
Unit or
Connector
Switch Unit
Connector
Common
terminal
number
C
1, 3
(See note 2.)
0
1
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
A7AS
Switch
Unit
Connector
0
1
2
3
4
5
6
7
8
9
C
6
0
1
●
1
2
●
2
3
3
4
4
5
5
7
6
8
7
8
Terminals connected to common
9 10 11
A7AS
Dial
1
5
2
7
4
9
8
11
●
●
●
●
●
●
●
●
Dial
2
3
4
5
6
7
8
9
Note:
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
Output Codes 06 (Binary Coded Decimal)
and 13 (See note.)
Model
Switch Unit or
Connector
Switch Unit
Connector
Dial
0
1
2
3
4
5
6
7
8
9
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Common
terminal
number
C
3
Terminals connected to
common
Note: 1.
Switches with output code 36 are double-sided PCB
models.
2.
Terminal 3 is the common terminal for the component-
adding provision.
3.
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
A7AS
1
5
2
7
4
9
8
11
Output Code 19 (Decimal Code with
Component-adding Provision)
Model
Switch Unit Common
or
Connector
terminal
number
Terminals connected to common
A7AS
Switch
Unit
Connector
0
1
2
3
4
5
6
7
8
9
C
6
0
1
●
1
2
●
2
3
3
4
4
5
5
7
6
8
7
8
9
9 10 11
Dial
●
●
●
●
●
●
●
●
Note: 1.
Switches with output code 13 are double-sided PCB
models.
2.
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
Note:
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
54
Thumbwheel Switch
A7AS
Terminals
Output code
A7AS
(solder terminals)
03
06 (13)
07 (36)
19
Forty-four, 1-dia. holes
Twenty-two, 1-dia. holes
Twenty-two, 1-dia. holes
Forty-four, 1 dia.
Component-adding provision
Component-adding provision
Note: 1.
Switches with output code 13 are double-sided PCB models equivalent to models with output code 06.
2.
Switches with output code 36 are double-sided PCB models equivalent to models with output code 07.
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
■
Push-operated Switches
A7AS-2@@(-1)
Solder terminals
(See note)
Number
of
Switches
(n)
1
2
3
4
5
A
(8n + 11)
B
(8n + 8)
C
(B + 1)
19 mm
27 mm
35 mm
43 mm
51 mm
59 mm
67 mm
75 mm
83 mm
91 mm
16 mm
24 mm
32 mm
40 mm
48 mm
56 mm
64 mm
72 mm
80 mm
88 mm
17 mm
25 mm
33 mm
41 mm
49 mm
57 mm
65 mm
73 mm
81 mm
89 mm
Solder terminal
Panel thickness: 1 to 3
6
7
8
9
Panel Cutout
10
Note: 1.
The dimensions above include both
End Caps, and will increase 8 mm for
each additional Switch inserted.
2.
Unless otherwise specified, a tolerance
of
±
0.4 mm applies to all dimensions.
The tolerance for multiple connection is
±
(number of units x 0.4) mm.
Note:
If the output code is 03 or 06, the dimension is 41.5; if the
output code is 07 or 19, the dimension is 53.5.
Thumbwheel Switch
A7AS
55
嵌入式系统
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