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)
.925 ± .010
(23,50 ± 0,25)
.865 ± .015
(21,97 ± 0,38)
.343 ± .025
(8,71 ± 0,64)
.045 ± .005
(1,14 ± 0,13)
.025 ± .002
(0,64 ± 0,05)
SQUARE PIN
(3 PLACES)
.250 ± .015
(6,35 ± 0,38)
3/8-32 UNEF-2A
THREAD
.250 + .001 –.002
(6,35 + 0,03 –0,05)
DIA.
NON-TURN
C
L
TAB
.400 ± .015
(10,16 ± 0,38)
Ø .470 ± .010
(11,94 ± 0,25)
.320 ± .010
(8,13 ± 0,25)
1.020 ±
.010
(25,91 ±
0,25)
.865 ±
.015
(21,97 ±
0,38)
C
L
.500 ± .010
(12,7 ± 0,25)
.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
LOCK TAB (2) FOR
MOUNTING BRACKET 25J5155
.219 ± .004
(5,56 ± 0,10)
90˚
.100 ± .005
(2,54 ± 0,13)
TYP.
C
L
BUSHING
FLATS
Optical and Mechanical
Encoders
C
L
.590 ± .010
(14,97 ± 0,25)
.250 ± .010
(6,35 ± 0,25)
MOUNTING
BRACKET
C
SHAFT
L
FLAT
trutH tabLeS
Clockwise rotation
4-Bit Gray Code-16 Position
Switch
position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Code
position
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
output
4
8
Switch
position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Clockwise rotation
4-Bit Binary Code Hexadecimal-16 Position
Code
position
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
output
4
8
Clockwise rotation
Quadrature 2-Bit Code
1/4 Cycle per Detent
Switch
position
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
32
33
34
35
36
"a"
output
"b"
Indicates closed circuit; blank indicates
open circuit.
Quadrature 2-bit Code
Output Table for CW Rotation
HIGH
LOW
HIGH
LOW
1
2
3
4
5
6
Indicates closed circuit; blank indicates
open circuit.
OUTPUT
A
OUTPUT
B
POSITION NUMBER
Indicates closed circuit;
blank indicates open
circuit. Code repeats
every 4 positions.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
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
+85 C°
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,
flatted bushing, .375" diameter, .320 double
“D” across flats.
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
Optical and Mechanical
Encoders
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
orDerinG inFormation
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
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)
25Lb10-Q-Z
Custom materials, styles, color and markings are available. Custom knobs available.
available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized Distributor or Grayhill.
For Custom codes. termination, torque, angles of throw, call Grayhill for more information.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
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