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
8421
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
8421
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
Optical and Mechanical
Encoders
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Mechanical Encoders
SPECIFICATIONS
Electrical Ratings
Switching Loads: 1.5mAat115Vac,resistive;
150mAat14Vdc,resistive
Current Carrying Capacity: 250mA
maximumat28Vdc,resistiveload
Contact Resistance: 75mΩ,typical
Insulation Resistance: 1000 mΩ minimum
betweenterminals
Voltage Breakdown: 1000 Vac minimum
betweenterminals
Life Expectancy:100,000cyclesofoperationat
ratedloads.Onecycleofoperationisarotation
throughalloftheactivepositionsandareturn
tothestartingposition.
Mechanical Ratings
Rotational Torque:2to6in-oz
Operating Temperature Range: -40 C° to
+85C°
Storage Temperature Range: -65 C° to +85
C°
Continuous Rotation: All standard switches
arecontinuousrotation.Desiredstoplocations
supplieduponrequest.
Anti-Rotation Device: Integral non-turn tab,
atted bushing, .375" diameter, .320 double
“D”acrossats.
Termination: StandardisPCstyle,parallelto
shaft,facingrear.OptionsincludePC,parallel
toshaft,facingfront.
Panel Mounting Torque: 10in-lbsmaximum
Materials and Finishes
Bushing/Housing and Shaft/Rotor: Reinforced
thermoplastic
Detent Ball: Stainlesssteel,nickel-plated
Detent Spring:Tinnedmusicwire
Contacts: Berylliumcopper,goldplateover
nickel
Terminals: Copperalloy,#725,100%tinplate
overnickelplate
Output Board:FR-4,copper/nickel-plated
Mounting Nut: Brass,tin/zinc-platedhexnut
Mounting Bracket: StainlessSteel,tin-plated
Series:25L=Economical,singledeckencoder
Housing Color:B=Blackhousing;R=Redhousing
Angle of Throw: 10=10°,36positions;11=11.25°,32positions;
15=15°,24positions;18=18°,20positions;
22=22.5°,16positions;30=30°,12positions;
45=45°,8positions
25LB10-Q-Z
Mounting Bracket:Z=withbracket,Blank=nobracket
Code Output: H=Hexadecimalavailableonlyin22.5°
G=Grayavailableonlyin22.5°
Q=Quadrature(2-bit)
ORDERING INFORMATION
Available from your local Grayhill Distributor.Forpricesanddiscounts,contactalocalSalesOfce,anauthorizedDistributororGrayhill.
For Custom codes. Termination, Torque, Angles of Throw, call Grayhill for more information.
Custommaterials,styles,colorandmarkingsareavailable.Customknobsavailable.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Grayhill:
25LB10-Q 25LB11-Q 25LB15-Q 25LB18-Q 25LB22-G 25LB22-H 25LB22-Q 25LB30-Q 25LB45-Q 25LR22-G-Z
25LB30-Q-Z 25LB15-Q-Z 25LR10-Q 25LR22-Q 25LR22-H 25LR22-Q-Z 25LR15-Q 25LR10-Q-Z 25LR11-Q
25LB11-Q-Z 25LB22-Q-Z 25LB22-H-Z 25LB10-Q-Z 25LR11-Q-Z 25LR22-G 25LR30-Q 25LB18-Q-Z 25LR15-Q-Z
25LR22-H-Z 25LB22-G-Z 25LB45-Q-Z 25LR30-Q-Z