CSM_A7PS_A7PH_DS_E_3_2
1
Thumbwheel Switch
A7PS/A7PH
Dust-tight, Easy-to-Use,
Push-operated Switches with
Large Display Characters
• Simple push mechanism and large, easy-to-view
numeric display make setting easy.
• Dust penetration prevented with seal for the display
windows.
Ordering Information
Switches (Single Switch Units)
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 “203,” “206,” “207,” “219,” “254,” or “255” 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., A7PS-206-S06-1).
4. Models with +, - displays can also be produced. Add “-PM” after the “206” in the model number (e.g., A7PS-206-PM or A7PS-206-PM-1)
*1. Models with PCB terminals are available.
*2. Models with diodes are available. Add “-D” to the model number (e.g., A7PS-207-D or A7PS-207-D-1).
Accessories (Order Separately)
Use accessories, such as End Caps and Spacers, with the Switch
Units.
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.)
* The minimum order is for 10 End Caps.
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.
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.
Model A7PS A7PH
Classification
(See note 1.)
Character height Decimal: 6.8 mm Hexadecimal: 4.0 mm
Terminals Solder terminals *1
Color Light gray Black Light gray Black
Output code number Model
03 (decimal code) A7PS-203 A7PS-203-1 A7PH-203 A7PH-203-1
06 (binary coded decimal) A7PS-206 A7PS-206-1 A7PH-206 A7PH-206-1
07 (binary coded decimal, with component-
adding provision) *2 A7PS-207 A7PS-207-1 A7PH-207 A7PH-207-1
19 (decimal code, with component-adding
provision) A7PS-219 A7PS-219-1 A7PH-219 ---
54 (binary coded hexadecimal) A7PS-254 A7PS-254-1 A7PH-254 A7PH-254-1
55 (binary coded hexadecimal, with compo-
nent adding provision) *2 A7PS-255 A7PS-255-1 --- ---
S
nap-in
(front mounting)
S
nap-in
(front mounting)
Long-life type
Accessory Color Light gray Black
End Caps A7P-M * A7P-M-1 *
Spacer A7P-P@
(See note.)
A7P-P@-1
(See note.)
Connec-
tors
Solder terminals NRT-C
NRT-CN
PCB terminals NRT-CP
Symbol
A B C D E F G
Stamp
No des-
ignation
SEC MIN H g kg mm
Symbol
H J K L Q T U
Stamp cm m °CPCS
x 10
SEC
0 •
2
A7PS/A7PH
Specifications
Dimensions (Unit: mm)
Switches
Accessories (Order Separately)
Note: Unless otherwise indicated, dimensional tolerances for dimensions in the models above are ± 0.4 mm.
Item Model A7PS A7PH
Switching capacity (resistive load) 50 VAC or 5 to 28 VDC
1 mA to 0.1 A
125 VAC or 5 to 28 VDC
10 µA to 0.15 A
Continuous carry current 1 A max. 3 A max.
Contact resistance 300 mΩ max.
Insulation
resistance
Between non-connected terminals
10 MΩ min. (at 500 VDC) 100 MΩ min. (at 500 VDC)
Between terminal and non-current carrying part 1,000 MΩ min. (at 500 VDC)
Dielectric
strength
Between non-connected terminals
600 VAC, 50/60 Hz for 1 min
Between terminal and non-current carrying part 1,000 VAC, 50/60 Hz for 1 min
Vibration resistance 10 to 55 Hz, 1.5-mm double amplitude for 2 hours min.
Shock resistance 490 m/s2 min.
Durability
Mechanical 100,000 operations min. 2,000,000 operations min.
Electrical 50,000 operations min. 1,000,000 operations min.
Ambient temperature Operating: -10°C to 65°C
Ambient humidity Operating: 45% to 85%
Max. operating force 6.37 N max.
10
0.1
33
A
±
22.6
3
30
33.5
7.2
3
P= 10
±0.2
8.6 1
B
4.5
4.6 4.3
Solder terminal
Panel thickness: 1 to 3
*If the output code is 03,06 or 54, the dimension is 43;
if the output code is 07,19 or 55, the dimension is 55.
*
31
B
+1
0
0
- 0.4
A7PS-2@@(-1)
A7PH-2@@(-1)
Solder Terminal
Note: 1. The dimensions above include both End
Caps, and will increase 10 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.
Number of
Switches (n)
Size A
(n x 10 + 12)
Size B
(n x 10 + 9)
12219
23229
34239
45249
56259
67269
78279
89289
9 102 99
10 112 109
Panel Cutout
30
33.5
(39)
33
46
3
(4.3) 4.5 30
33.5
(39)
33
46 3
(4.3)
4.5
4.5
4
4.4
End Caps for Push-operated Switches
A7P-M(-1) Snap-in Panel Mounting
Left Side Right Side
4.5
10±
0.05
32.7
(36.5)
30±
0.1
Spacers for Push-operated Switches
A7P-P@(-1) Snap-in Panel Mounting
The @ in the Spacer model number stands for a letter in the range A to U. (Refer to the table under the explanation about Spacers on page 1.)
3
A7PS/A7PH
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.
•How to Read Output Codes
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.
6
9 31
10
11
2
UP
30.2
±0.1
20.5 13.5
9
P= 2.54
25.4
±0.2
32
3
±0.15
34
42
±0.15
48
7.8
0
- 0.1
Two, 3.3 dia.
C
onnectors
(These devices allow Switches to be quickly removed for maintenance and inspection of connectivity, and quickly re-installed.)
NRT-C Solder Terminals
5 31
6
7
8
9
10
11
42
UP
30
7.8
32
34
20.5 13.5
9
P= 2.54
25.4
±0.2
3
±0.15
+0
-0.3
+ 0.3
0
1×2
elliptic
hole
NRT-CN Solder Terminals
5 31
6
7
8
9
10
11
42
UP
30.2 ±0.1
25.4 ±0.2
7.8
32
34
17.5
0.6 0.6
13.5
9
P= 2.54
25.4 ±0.2 3±0.15
0
- 0.1
×
NRT-CP PCB Terminals
Note: Unless otherwise indicated, dimensional tolerances for dimensions in the models above are ± 0.4 mm.
Inserting Connectors
Insert Connectors with the “UP” arrow pointing up.
Connector
Output code
number
Terminals Output codes
03
19
06
07
30
P= 2.54
2.5
3
9
8
7
6
5
4
4
C
4
3
2
1
0
Twenty
-two,
1.1-dia.
holes
Note: The solid dot ● indicates that the internal switch is ON
(i.e., connected to the common terminal).
Model
Switch Unit
or Connector
Common ter-
minal number
Terminals connected to common
Switch
Unit C 0123456789
03,19
Connec-
tor
6 12345789
10 11
Dial
0●
1●
2●
3●
4●
5●
6●
7●
8●
9●
30
12.7
12.7
P= 2.54
2.5
8.5 3
4.5
9
8
7
6
5
C
C
4
4
C
4
3
2
1
0
Forty-four, 1-dia. holes
Component-adding provision
30
P= 5.08
2.5
3
8
4
2
2
2
1
1
1
C
Ten,
1.1-dia.
holes
Model
Switch Unit
or Connector
Common ter-
minal number
Terminals con-
nected to common
Switch
Unit C 1248
06
Connec-
tor
3
579
11
07
Connec-
tor
1
Dial
0
1●
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).
30
P= 5.08
2.5
8.5 3
4.5
8
4
2
2
2
4
4
1
C
Twenty
-three,
1.1-dia.
holes
Component-adding provision
4
A7PS/A7PH
Ordering Procedure
Place orders as shown in the example below, specifying the model and number.
Safety Precautions
Refer to Precautions for Correct Use on in the Technical Guide for Thumbwheel Switches.
Handling
•The molded components of the Switch use polyacetal resin and
ABS resin. It is recommended that alcohol is used to wipe off dirt
and smudges from the molded components. Take care to prevent
the alcohol from getting inside.
•A7P Thumbwheel Switches are dust-proof, but they are not drip-
proof. Do not use them in areas subject to water or oil exposure.
•Do not allow solder flux or alcohol to enter the Switch.
•Do not push the (+) and (-) operating push-buttons at the same
time.
Output code
number
Terminals Output codes
54
55
1. A7P-M (End Caps): 1 set
2. A7PS-203 (Switch Unit): 1 piece
3. A7PS-206 (Switch Unit): 1 piece
4. A7P-PA (Spacer): 1 piece
5. A7PS-207 (Switch Unit): 1 piece
6. A7PS-219 (Switch Unit): 1 piece
Note: Standard products are not factory-assembled for
shipment. Contact your OMRON representative
for details on ordering factory-assembled sets.
7. NRT-C (Connector): 4 pieces
Precautions for Correct Use
Ten, 1.1-dia.
holes
Note: 1. The solid dot l indicates that the
internal switch is ON
(i.e., connected to the common
terminal).
Model
Switch Unit
or Connector
Common ter-
minal number
Terminals
connected to
common
Switch
Unit C 1248
54
Connec-
tor
3
579
11
55
Connec-
tor
1
Dial
0
1●
2●
3●●
4●
5●●
6●●
7●●●
8●
9●●
A●●
B●● ●
C●●
D●●●
E●●●
F●●●●
Twenty
-three,
1.1-dia.
holes
Component-adding provision
7
61
5
4
3
2
1
Read and Understand This Catalog
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or
comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified)
from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR
FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR COMMERCIAL LOSS
IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS
OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT
SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's
application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply to the
products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product,
machine, system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible
uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:
Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog.
Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles,
safety equipment, and installations subject to separate industry or government regulations.
Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE
SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons.
It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made.
However, some specifications of the products may be changed without any notice. When in doubt, special model numbers may be assigned to fix or
establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual
specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
PERFORMANCE DATA
Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the
result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON
Warranty and Limitations of Liability.
ERRORS AND OMISSIONS
The information in this document has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical,
typographical, or proofreading errors, or omissions.
2012.8
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2012 All Right Reserved.
