Grayhill Mechanical Rotary Encoders 25L Series User Manual
Mechanical encoders series 25l, Truth tables, Clockwise rotation
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical and Mechanical
Encoders
Mechanical Encoders
SerieS 25L
Hex, Gray and Quadrature Code
FeatureS
• Price Competitive to Similar Designs
• Quality Construction and Contact Materials
• Multiple Code and Indexing Choices
• 100,000 Life Cycles
• Less than 1.0" Square
• Manufactured to ISO 9001 Standards
DimenSionS
in inches (and millimeters)
1.020 ±
.010
(25,91 ±
0,25)
.590 ± .010
(14,97 ± 0,25)
.865 ±
.015
(21,97 ±
0,38)
.865 ± .015
(21,97 ± 0,38)
.925 ± .010
(23,50 ± 0,25)
C
L
C
L
.100 ± .005
(2,54 ± 0,13)
TYP.
90˚
BUSHING
FLATS
SHAFT
FLAT
.219 ± .004
(5,56 ± 0,10)
Ø .470 ± .010
(11,94 ± 0,25)
.320 ± .010
(8,13 ± 0,25)
.400 ± .015
(10,16 ± 0,38)
C
L
NON-TURN
TAB
3/8-32 UNEF-2A
THREAD
.250 + .001 –.002
(6,35 + 0,03 –0,05)
DIA.
.250 ± .015
(6,35 ± 0,38)
.500 ± .015
(12,7 ± 0,38)
NON-TURN TAB
Ø .120 ± .005 (3,05 ± 0,13) WIDE
BY .068 ± .005 (1,73 ± 0,13) THICK
.250 ± .015
(6,35 ± 0,38)
.343 ± .025
(8,71 ± 0,64)
.045 ± .005
(1,14 ± 0,13)
.250 ± .010
(6,35 ± 0,25)
C
L
C
L
.500 ± .010
(12,7 ± 0,25)
.025 ± .002
(0,64 ± 0,05)
SQUARE PIN
(3 PLACES)
LOCK TAB (2) FOR
MOUNTING BRACKET 25J5155
MOUNTING
BRACKET
Indicates closed circuit; blank indicates
open circuit.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
8
4
2
1
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Clockwise rotation
Code
position
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
8
4
2
1
output
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Switch
position
Clockwise rotation
4-Bit Binary Code Hexadecimal-16 Position
4-Bit Gray Code-16 Position
Indicates closed circuit;
blank indicates open
circuit. Code repeats
every 4 positions.
Quadrature 2-Bit Code
1/4 Cycle per Detent
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
"b"
"a"
output
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Switch
position
Clockwise rotation
Switch
position
Code
position
output
Indicates closed circuit; blank indicates
open circuit.
trutH tabLeS
OUTPUT
A
OUTPUT
B
HIGH
LOW
HIGH
LOW
POSITION NUMBER
1 2 3 4 5 6
Quadrature 2-bit Code
Output Table for CW Rotation