Thumbwheel Switch
A7PS/A7PH
CSM_A7PS/A7PH_DS_E_6_1
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)
Model
Snap-in
(front mounting)
Classification
(See note 1.)
Long-life type
Character height
Terminals
Color
Output code number
03 (decimal code)
06 (binary coded decimal)
07 (binary coded decimal, with component-
adding provision) *1
19 (decimal code, with component-adding
provision)
54 (binary coded hexadecimal)
55 (binary coded hexadecimal, with compo-
nent adding provision) *1
Decimal: 6.8 mm Hexadecimal: 4.0 mm
Solder terminals
Black
Light gray
Model
A7PS-203-1
A7PH-203
A7PS-206-1
A7PH-206
A7PS-207-1
A7PS-219-1
A7PS-254-1
A7PS-255-1
A7PH-207
---
A7PH-254
---
A7PS
Snap-in
(front mounting)
A7PH
Light gray
A7PS-203
A7PS-206
A7PS-207
A7PS-219
A7PS-254
A7PS-255
Black
A7PH-203-1
A7PH-206-1
A7PH-207-1
---
A7PH-254-1
---
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 “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).
“-SOF” can not be available for type -254, -255.
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 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.
Accessory
End Caps
Spacer
Connec-
tors
Solder terminals
PCB terminals
Color
Light gray
Black
A7P-M
A7P-M-1
A7P-P@
A7P-P@-1
(See note.)
(See note.)
NRT-C
NRT-CN
NRT-CP
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.
Symbol
A
No des-
Stamp
ignation
H
cm
B
SEC
J
m
C
MIN
K
°C
D
H
L
PCS
E
g
Q
x 10
SEC
F
kg
T
0
G
mm
U
•
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.)
Symbol
Stamp
1
A7PS/A7PH
Specifications
A7PS
A7PH
50 VAC or 3.3 to 28 VDC
125 VAC or 3.3 to 28 VDC
Switching capacity (resistive load)
1 mA to 0.1 A
10
μA
to 0.15 A
Continuous carry current
1 A max.
3 A max.
Contact resistance
300 mΩ max.
10 MΩ min. (at 500 VDC)
100 MΩ min. (at 500 VDC)
Insulation Between non-connected terminals
resistance Between terminal and non-current carrying part
1,000 MΩ min. (at 500 VDC)
600 VAC, 50/60 Hz for 1 min
Dielectric Between non-connected terminals
strength
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/s
2
min.
Mechanical
100,000 operations min.
2,000,000 operations min.
Durability
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.
Item
Model
Dimensions
Switches
A7PS-2@@(-1)
A7PH-2@@(-1)
Solder Terminal
33
7.2
10
±
0.1
A
3
33.5
(Unit: mm)
*
Number of
Switches (n)
1
2
3
4
5
6
7
8
9
10
Size A
(n x 10 + 12)
22
32
42
52
62
72
82
92
102
112
Size B
(n x 10 + 9)
19
29
39
49
59
69
79
89
99
109
22.6
30
3
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.
Panel Cutout
31
- 0
0.4
4.5
8.6
1
P= 10
±
0.2
B
B
+1
0
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.
Accessories (Order Separately)
End Caps for Push-operated Switches
A7P-M(-1) Snap-in Panel Mounting
Left Side
(39)
33
4
3
6
6
3
Right Side
(39)
33
4
33.5
4.4
4
33.5
30
(4.3)
4.5
4.5
4.5
(4.3)
30
Spacers for Push-operated Switches
A7P-P@(-1) Snap-in Panel Mounting
32.7
30
±
0.1
4.5
10
±
0.05
(36.5)
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.)
Note: Unless otherwise indicated, dimensional tolerances for dimensions in the models above are
±
0.4 mm.
2
A7PS/A7PH
Connectors
(These devices allow Switches to be quickly removed for maintenance and inspection of connectivity, and quickly re-installed.)
NRT-C Solder Terminals
NRT-CN Solder Terminals
NRT-CP PCB Terminals
48
42
±
0.15
34
30.2
±
0.1
7.8
0
- 0.1
34
30
+ 0.3
0
34
30.2
±
0.1
25.4
±
0.2
7.8
- 0
0.1
Two, 3.3 dia.
0
7.8
+ 0.3
-
9
20.5
9
20.5
UP
9 11
10
6
UP
13.5
1×2
elliptic
hole
3
±
0.15
9
17.5
UP
13.5
13.5
P= 2.54
25.4
±
0.2
3
±
0.15
1
2
3
4
5
6
7
9 11
8 10
P= 2.54
25.4
±
0.2
1
2
3
4
5
6
7
8
9
11
10
0.6
×
0.6
3
±
0.15
P= 2.54
25.4
±
0.2
1
2
3
32
32
32
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 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.
Output code
number
Terminals
9
8
7
6
P= 2.54
5
C
30
4
3
2
1
0
Output codes
Model
Switch Unit
or Connector
Switch
Unit
Connec-
tor
0
1
2
3
Dial
30
12.7
Common ter-
minal number
C
6
0
1
Terminals connected to common
1
2
2
3
3
4
4
5
5
7
6
8
7
9
8
9
03
Twenty
-two,
1.1-dia.
holes
3
03,19
10 11
2.5
●
●
●
●
●
●
●
●
●
●
Forty-four, 1-dia. holes
9
8
7
P=
6
5
C
4
3
2
1
0
4
5
6
7
8
9
2.54 12.7
19
8.5
3
4.5
2.5
Component-adding provision
Note: The solid dot
●
indicates that the internal switch is ON
(i.e., connected to the common terminal).
Model
Switch Unit
or Connector
Switch
Unit
Connec-
tor
Connec-
tor
0
1
Common ter-
minal number
C
3
5
1
7
9
11
Terminals con-
nected to common
1
2
4
8
8
4
2
P= 5.08
30
06
Ten,
1.1-dia.
holes
1
C
06
2.5
3
07
●
●
● ●
●
●
●
● ●
● ● ●
●
●
●
Note: The solid dot
●
indicates that
the internal
switch is ON
(i.e., connected
to the common
terminal).
8
4
2
1
4
P= 5.08
30
2
3
Dial
4
5
6
7
8
9
07
Twenty
-three,
1.1-dia.
holes
C
8.5
3
4.5
2.5
Component-adding provision
3
A7PS/A7PH
Output code
number
Terminals
Model
Output codes
Switch Unit
or Connector
Switch
Unit
Common ter-
minal number
C
3
5
1
0
1
2
3
4
5
6
7
Dial
8
9
A
7
9
11
Terminals
connected to
common
1
2
4
8
54
Ten, 1.1-dia.
holes
54
55
Connec-
tor
Connec-
tor
●
●
● ●
●
●
●
● ●
● ● ●
●
●
●
● ●
●
●
●
●
● ●
● ●
● ● ●
● ● ● ●
55
Twenty
-three,
1.1-dia.
holes
Component-adding provision
B
C
D
E
F
Note: 1. The solid dot l indicates that the
internal switch is ON
(i.e., connected to the common
terminal).
Ordering Procedure
Place orders as shown in the example below, specifying the model and number.
7
1.
2.
3.
4.
5.
6.
A7P-M (End Caps): 1 set
A7PS-203 (Switch Unit): 1 piece
A7PS-206 (Switch Unit): 1 piece
A7P-PA (Spacer): 1 piece
A7PS-207 (Switch Unit): 1 piece
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
1
2
3
4
5
6
1
Safety Precautions
Refer to
Precautions for Correct Use
on
in the
Technical Guide for Thumbwheel Switches
.
Precautions for Correct Use
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.
•
To separate the Switches, use a flat-blade screwdriver as shown in the
following figure to release the hooks on the top and bottom and then
separate the Switches. Be careful not to bend the hooks.
4
Terms and Conditions Agreement
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.
Warranties.
(a) Exclusive Warranty.
Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy.
Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses 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. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See
http://www.omron.com/global/
or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials 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 user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s
Warranty and Limitations of Liability.
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 part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application.
Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2014.9
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 2014 All Right Reserved.
