Thumbwheel Switch
A7BS/A7BL
CSM_A7BS/A7BL_DS_E_6_1
Wide Range of Locking-type
Models Available
Character height of 4.8 or 3.2 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.
Ordering Information
Switches (Single Switch Units)
Model A7BS A7BS-20@-S
Snap-in (front mounting) Snap-in (front mounting)
Classification
(See note 1.)
With external stoppers
Character height Decimal: 4.8 mm Hexadecimal: 3.2 mm 4.8 mm
Terminals Solder terminals *1
Color Light gray Black Light gray Black
Output code number Model
06 (binary coded decimal) A7BS-206 *2 A7BS-206-1 *2 A7BS-206-S A7BS-206-S-1
07 (binary coded decimal, with component
A7BS-207 *2 A7BS-207-1 *2 A7BS-207-S A7BS-207-S-1
adding provision) *3
19 (decimal code, with component-adding provision) A7BS-219 A7BS-219-1 --- ---
54 (binary coded hexadecimal) A7BS-254 A7BS-254-1 --- ---
55 (binary coded hexadecimal, with
A7BS-255 A7BS-255-1 --- ---
component-adding provision) *3
Model A7BL
Snap-in (front mounting)
Classification
(See note 1.)
Locking type
Character height 4.8 mm
Terminals Solder terminals *1
Color Light gray Black
Output code number Model
06 (binary coded decimal) A7BL-206 *2 A7BL-206-1 *2
07 (binary coded decimal, with component-
A7BL-207 *2 A7BL-207-1 *2
adding provision) *3
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.
*1. For models with PCB terminals, add -P2 to the model number (e.g., A7BS-
207-P2-1).
*2. 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).
For structural reasons, models with stoppers cannot be manufactured for
the A7BS-254 and A7BS-255.
*3. Models with diodes are available. Add -D to the model number (e.g., A7BS-
207-D or A7BS-207-D-1).
1A7BS/A7BL
Accessories (Order Separately)
Use accessories, such as End Caps, Spacers, and Connectors with the Switch Units.
End Caps, Spare Units, and Connectors
Accessory Color Light gray Black
End Caps (1 pair) A7B-M A7B-M-1
Spacer A7B-P@ (See note.) A7B-P@-1 (See note.)
Solder terminals A7B-C
Connectors
PCB terminals A7B-CP
Note: 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.)
End Caps Spacers
End Caps are used on the Switch Units at each end and allow all the Spacers are used for creating extra space or gaps between the
Switch Units to be securely mounted to a panel. They come in pairs, Switch Units and have the same dimensions as the Switch Units
one for the left and one for the right. 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 A B C D E F G
No des-
Stamp SEC MIN H g kg mm
ignation
Symbol H J K L Q T U
x 10
Stamp cm m CPCS 0
SEC
Specifications
3.3 to 28 VDC or 50 VAC
Switching capacity (resistive load)
1 mA to 0.1 A
Continuous carry current 1 A max.
Contact resistance 300 m max.
Between non-connected
10 M min. (at 500 VDC)
terminals
Insulation
resistance
Between terminal and
1,000 M min. (at 500 VDC)
non-current carrying part
Between non-connected
600 VAC, 50/60 Hz for 1 min
terminals
Dielectric
strength
Between terminal and
1,000 VAC, 50/60 Hz for 1 min
non-current carrying part
Vibration resistance 10 to 55 Hz, 1.5-mm double amplitude
2
Shock resistance 490 m/s min.
Mechanical 100,000 operations min.
Durability
Electrical 50,000 operations min.
Operating: -10C to 65C (with no icing)
Ambient temperature
Storage: -20C to 80C
Ambient humidity Operating: 45% to 85%
Max. operating force 5.39 N max.
2