Explanation of Common Terms
Output Codes
|
Term |
Meaning |
|
Binary Code |
Combined 2-value (“0” and
“1,” “OFF” and “ON,” etc.) sign. |
|
Decimal Code |
Uses the ten digits: 0, 1,
2, 3, 4, 5, 6, 7, 8, 9. |
|
Binary Coded Decimal Code |
Each decimal number is
represented by a binary code (see following table). |
|
Binary Coded Hexadecimal
Code |
Each hexadecimal numeral is represented by a binary code. 0, 1, 2, 3,
4, 5, 6, 7, 8, 9, A, B, C, D, E, and F represent the sixteen possible
values. |
+/− Dial Display (“-PM”
Models)
It is possible to produce 06-type models
(binary coded decimal code) that display “+, −, +...−” instead of “1, 2,
3...9”. The model numbers used for this type of Switch are A7[]-206-PM and
A7[]-206-PM-1. Below is an example of the A7BS-206-PM. The
Switch's output terminal 1 and common terminal are used for binary output.
A7BS-206-PM Thumbwheel Switch
Example of A7BS-206-PM
|
Model |
Switch Unit or
Connector |
Common
terminal number |
Terminals
connected to common |
|
A7BS |
Switch Unit |
C |
1 |
2 |
4 |
8 |
|
Connector |
2 |
4 |
5 |
6 |
7 |
|
Dial |
+(0) |
|
|
|
|
|
-(1) |
• |
|
|
|
|
+(2) |
|
• |
|
|
|
-(3) |
• |
• |
|
|
|
+(4) |
|
|
• |
|
|
-(5) |
• |
|
• |
|
|
+(6) |
|
• |
• |
|
|
-(7) |
• |
• |
• |
|
|
+(8) |
|
|
|
• |
|
-(9) |
• |
|
|
• |
Note:
1. The solid dot • indicates that the
internal switch is ON.
2. Numbers enclosed in parentheses are the dial displays for the A7BS-206.
Attaching Stoppers
Stoppers are mechanisms for preventing the
wheels rotating outside set ranges. There are internal stoppers that are
set at setup and external stoppers that can be set as required at any
time. For example, a wheel that normally displays any number in the range
0 to 9 can be restricted to the range 0 to 5 using a stopper.
• Add -S[][] to the suffix, specifying the range in the blanks.
Example: A7PS-203-S05
• Units to which stoppers can be attached
are the A7DP, A7D, A7BS, A7BL, A7PS, A7PH, and A7AS. Consult your OMRON
representative for details on individual model numbers.
• On the outside of the A7BS-[]-S is a
Stopper Pin with which the user can make any setting.
• The A7CN-2, A7CN-1, A7CN-L2, A7MD, and
A7MA cannot be equipped with stoppers.
Built-in Diodes
Note: The A7MD has special specifications
(anode common). Be sure to connect the terminals with the correct
polarity.
The configuration for the
A7MD-106-P-D is shown below.
Note: The diode (DAP202K, made by Rohm) is
installed inside the case.
Recommended Products
|
Thumbwheel Switch
A7BS/A7BL
Wide range of locking-type models
available. |
|
Thumbwheel Switch
A7D/A7DP
Ultra-small, low-cost, push-operated
Switches. |
|
Thumbwheel Switch
A7PS/A7PH
Dust-tight, easy-to-use, push-operated
Switches with large display characters. |
|
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