Thumbwheel Switch
A7BS/A7BL
Refer to
Warranty and Application Considerations
(page 1) and
Safety
Precautions
(page 3).
Wide Range of Locking-type Models
Available
• Character height of 4.8 mm makes for easy-to-view display.
• Installation is easy with snap-in mounting.
• The series includes a complete range of locking-type models
that prevent accidental operation.
Model Number Structure
■
Model Number Legend
A7B@-2@@-@@@-@
1 2
3
4
5
1. Operation Method
S:
Push type
L:
Set-locking type
2. Mounting Method
2:
Front mounting
3. Output Code Number
06:
Binary coded decimal output
07:
06 with component-adding provision
19:
Double-sided PCB version of 06 with component-adding provision
54:
Binary coded hexadecimal code (See note 1.)
55:
54 with component-adding provision (See note 1.)
4. External Stoppers
None: Without external stoppers
S@@: Internal stoppers (-S(1)(5) indicates the switch display limited to 1 to 5).
S:
With external stoppers (See note 2.)
5. Unit Color
None: Light gray
1:
Black
Note: 1.
Output code number 54 and 55 can be used for A7BS without external stoppers only.
2.
External stoppers are not available for Locking type.
30
Thumbwheel Switch
A7BS/A7BL
Ordering Information
■
List of Models
Push-operated Switches
Model
Classification
(See note 1.)
A7BS
Screw mounting (front mounting)
A7BS-20@-S
Snap-in (front mounting)
With external stoppers
Terminals
Color
Output code number
06 (binary coded decimal)
07 (binary coded decimal, with component adding
provision) (See note 6.)
19 (decimal code, with component-adding provision)
54 (binary coded hexadecimal)
Light gray
Model
A7BS-206
(See note 5.)
A7BS-207
(See note 5.)
A7BS-219
A7BS-254
A7BS-206-1
(See note 5.)
A7BS-207-1
(See note 5.)
A7BS-219-1
A7BS-254-1
A7BS-255-1
Solder terminals (See note 4.)
Black
Light gray
Model
A7BS-206-S
A7BS-207-S
---
---
---
A7BS-206-S-1
A7BS-207-S-1
---
---
---
Black
55 (binary coded hexadecimal, with component-adding
A7BS-255
provision) (See note 6.)
Model
Classification
(See note 1.)
A7BL
Snap-in (front mounting)
Locking type
Terminals
Color
Output code number
06 (binary coded decimal)
07 (binary coded decimal, with component-adding
provision) (See note 6.)
Model
A7BL-206 (See note 5.)
A7BL-207 (See note 5.)
A7BL-206-1 (See note 5.)
A7BL-207-1 (See note 5.)
Solder terminals (See note 4.)
Light gray
Black
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 Switch Units.
3.
Models with +,
−
displays can also be produced. Add “-PM” (+/– alternating display) or “-MP” (–/+ alternating display) after the “206” or
“207” in the model number (e.g., A7BS-206-PM, A7BS-207-PM-1, or A7BS-206-MP). There is no “-MP” type available, however, for
A7BS-20@-S models.
4.
For models with PCB terminals, add “-P2” to the model number (e.g., A7BS-207-P2-1).
5.
Models with internal stoppers are also available. Add “-S@@” after the “206” or “207” 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., A7BS-206-S06-1).
6.
Models with diodes are available. Add “-D” to the model number (e.g., A7BS-207-D or A7BS-207-D-1).
Thumbwheel Switch
A7BS/A7BL
31
Accessories (Order Separately)
Use accessories, such as End Caps, Spacers, and Connectors with the Switch Units.
Accessory
Color
End Caps (1 pair)
Spacer
Connectors
Solder terminals
PCB terminals
A7B-M (See note 2.)
A7B-P@ (See note 1.)
A7B-C
A7B-CP
A7B-M-1 (See note 2.)
A7B-P@-1 (See note 1.)
Light gray
Black
Note: 1.
The
@
in the Spacer model number stands for a letter in the range A to U. (Refer to the table in the following explanation about Spacers.)
2.
The minimum ordering unit is 10.
End Caps
End Caps are used on the Switch Units at each end and allow all the
Switch Units to be securely mounted to a panel. They come in pairs,
one for the left and one for the right.
■
Ordering Procedure
Place orders as shown in the example below, specifying the model
and number. Standard products are not factory-assembled for
shipment. Contact your OMRON representative for details on
ordering factory-assembled sets.
Spacers
Spacers are used for creating extra space or gaps between the
Switch Units and have the same dimensions as the Switch Units
themselves.
There are also Spacers with engraved characters or symbols that
can be used for indicating units, such as time and length. (Refer to
the following table.) Consult your OMRON representative for details.
Symbol
Stamp
Symbol
Stamp
A
B
C
MIN
K
D
H
L
PCS
E
g
Q
x 10
SEC
F
kg
T
0
G
mm
U
•
No
SEC
designation
H
cm
J
m
°
C
4
1.
2.
3.
4.
1
3
2
4
A7BS-206 (Switch Unit): 2 pieces
A7BS-207 (Switch Unit): 2 pieces
A7B-PA (Spacer): 1 piece
A7B-M (End Caps): 1 pair
Specifications
■
Characteristics
Item
Switching capacity (resistive load)
Continuous carry current
Contact resistance
Insulation resistance
Dielectric strength
Vibration resistance
Shock resistance
Durability
Ambient temperature
Ambient humidity
Max. operating force
Mechanical
Electrical
Between non-connected terminals
Between terminal and non-current carrying part
Between non-connected terminals
Between terminal and non-current carrying part
A7BS/A7BL
5 to 28 VDC or 50 VAC
1 mA to 0.1 A
1 A max.
300 m
Ω
max.
10 M
Ω
min. (at 500 VDC)
1,000 M
Ω
min. (at 500 VDC)
600 VAC, 50/60 Hz for 1 min
1,000 VAC, 50/60 Hz for 1 min
10 to 55 Hz, 1.5-mm double amplitude
490 m/s
2
min.
100,000 operations min.
50,000 operations min.
Operating: –10
°
C to 65
°
C (with no icing)
Storage: –20
°
C to 80
°
C
Operating: 45% to 85%
5.39 N max.
32
Thumbwheel Switch
A7BS/A7BL
■
Output Codes/Terminals
Switches with output codes 06 or 07 both use binary coded decimal
but Switches with output code 07 have a component-adding
provision. Similarly, Switches with output codes 54 or 55 both use
binary coded hexadecimal but Switches with output code 55 have a
component-adding provision.
Output Codes 06 and 07
Model
Switch Unit
or Connector
Switch Unit
06
07
Dial
Connector
Connector
0
1
2
3
4
5
6
7
8
9
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Common
terminal number
C
2
1
Terminals connected to
common
1
4
4
2
5
5
4
6
6
8
7
7
How to Read Output Codes
Example for 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 2, and terminals 1 and 2 become connector
terminals 4 and 5 respectively.
Output code
number
06
Terminals
Note:
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
Output Code 19
Dial
Fourteen,
1-dia. holes
Terminal connected to common
0
1
●
●
●
●
●
●
●
●
●
2
3
4
5
6
7
8
9
0
●
07
1
2
3
4
5
Twenty-eight,
1-dia. holes
6
7
8
9
1.3
9
8
6
4
2
0
Component-adding provision
19
8
6
4
2
7
5
3
1
P=3.6
Note:
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
20.6
Output Codes 54 and 55
Model Switch Unit or
Connector
Switch Unit
54
55
Dial
Connector
Connector
0
1
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
Nineteen,
1-dia. holes
15
2.5
15
2.5
2.5
Common
terminal number
C
2
1, 2 (See note 2.)
Terminals connected to
common
1
4
4
2
5
5
4
6
6
8
7
7
54
Fourteen,
1-dia. holes
2
3
4
5
6
7
8
9
55
Twenty-eight,
1-dia. holes
A
B
C
D
E
F
Component-adding provision
Note: 1.
The solid dot • indicates that the internal switch is ON
(i.e., connected to the common terminal).
2.
Terminal 2 is the common terminal for the component-
adding provision.
Thumbwheel Switch
A7BS/A7BL
33
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
■
Push-operated Switches
A7BS-2@@(-1)
Solder Terminals
(See note)
Number of
Switches
(n)
1
2
3
4
5
A
(n x 8 + 8)
16 mm
24 mm
32 mm
40 mm
48 mm
56 mm
64 mm
72 mm
80 mm
88 mm
B
(n x 8 + 6)
14 mm
22 mm
30 mm
38 mm
46 mm
54 mm
62 mm
70 mm
78 mm
86 mm
C
14.4 mm
22.4 mm
30.4 mm
38.4 mm
46.8 mm
54.8 mm
62.8 mm
70.8 mm
78.8 mm
86.8 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
Spacer 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 06 or 54, the dimension is 32.5; if the output
code is 07 or 55, the dimension is 43.5.
Thumbwheel Switches with External
Stoppers: A7BS-20@-S(-1)
•
Use A7BS-S Stopper Pins to make dial display restrictions for
these Switches.
•
Insert the Stopper Pins in the positions required to give the desired
display range. For example, for a display range of 0 to 5, insert a
Stopper Pin at position 1 (see following diagram) to stop the display
from going above 5 when the (+) button is pressed, and insert a
Stopper Pin at position 2 to stop the display from going below 0
when the (
−
) button is pressed.
Refer to page 37 for details.
Stopper Pins
2.4 dia.
1.2 dia.
Note:
1. Two pins constitute one set.
2. The first shipment is free and is
attached to the Switch.
Pin insertion position (2)
Ten, 1.2 dia.
Pin insertion position (1)
34
Thumbwheel Switch
A7BS/A7BL
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