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EC45A Datasheet(PDF) 2 Page - ALPS ELECTRIC CO.,LTD.

Part # EC45A
Description  45mm Size Encoder/Potentiometer
PDF  3 Pages
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Manufacturer  ALPS [ALPS ELECTRIC CO.,LTD.]
Direct Link  http://www.alps.com
Logo ALPS - ALPS ELECTRIC CO.,LTD.

EC45A Datasheet(HTML) 2 Page - ALPS ELECTRIC CO.,LTD.

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461
Encoder
Type
Potentiometer
Type
Hollow Shaft
Type Devices
Dimensions
Unit:mm
No.
Style
PC board mounting hole dimensions
（Viewed from switch mounting face）
3
ø2
hole
2.6
36
18
1
2
3
3
42.8
44.4
RK45A
Potentiometer Type
ø44.5
ø35.6
34.8
9
9
7
3.5
3.5
20
Photo
Standard Codes（Absolute Type）
Number of
positions
Code
Gray
4
2
3
5
6
1
●
2
●
●
3
●
4
●
●
5
●
●
●
6
●
●
7
●
8
●
●
9
●
●
●
10
●
●
●
●
11
●
●
●
12
●
●
13
●
●
●
14
●
●
15
●
16
●
●
17
●
●
●
18
●
●
●
●
19
●
●
●
20
●
●
●
●
21
●
●
●
●
●
22
●
●
●
●
23
●
●
●
24
●
●
25
●
●
●
26
●
●
●
●
27
●
●
●
28
●
●
29
●
●
●
30
●
●
31
●
31
Posit
ion
1. The
● marks shows the ON position.
2. The
● marks : Connections between terminals and the common terminal（terminal No. =1）are ON.
Terminal
V1
＝V2＝2.5V max.
5V DC
RR
tt
V1
V2
ON
ON
OFF
Terminal 2
Terminal 1
Terminal 3
Encoder
Test circuit
Output waveform
t : Masking time to avoid chattering
Measurement condition：Rotation speed 360˚/s
At R = 10k
Ω
Chattering : 3ms max.
Bounce
: 2ms max.
Circuit Diagram（Potentiometer Type）
CW
1
2
3
Clockwise
direction
ON
A（Terminal 1Ð3）
A（Terminal 1Ð3）
B（Terminal 2Ð3）
B（Terminal 2Ð3）
Signal
Output
Counter-clockwise
direction
OFF
ON
OFF
ON
OFF
ON
OFF
Shaft rotational
Direction
The dotted lines indicate detent positions
Output Wave（Incremental Type）
Sliding Noise（Incremental Type）
45mm Size Encoder/Potentiometer
EC45A/RK45A Series
Hollow Shaft Type Devices



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