Mechanical Encoders
SerieS 20
Concentric Shafts
FeatureS
• Compact mechanical encoder with concentric shafts
• Output Code Choices
• Panel and Shaft Seal Option
• Manufactured to ISO 9001 and Military Standards
• Available with a fixed stop or continuous rotation
• Custom Configurations Available
DimenSionS
in inches
Optical and Mechanical
Encoders
SpeCiFiCationS
electrical ratings
Switching Loads:
150 mA, 115 Vac
200 mA, 28 Vdc
Life expectancy:
25,000 cycles at rated loads
Contact resistance: 300 mohms max.
(less than 100 mohms initially)
insulation resistance: 1000 Mohms min.
(10,000 Mohms initially)
Dielectric Strength: 500 Vac min.
mechanical ratings
Stop Strength: 5 in-lbs.
rotational torque:
5 in-oz outer shaft
3.5 in-oz inner shaft
mounting torque: 12 in-lbs. recommended
operating temperature range:
-40°C to +85°C
Storage temperature range:
-55°C to +100°C
immersion:
15 psi (33ft) for 30 minutes
pin Dimensions: .018 inch square
Hardware Dimensions:
Lockwasher: .437inch diameter, .022inch thick
Hex Nut: 5/16-32 UNEF-2B Thread,
.437 inch across flats, .094 inch thick
materials and Finishes
terminal pins: Phosphor bronze with tin over
nickel plating
panel Seal:
Buna-N rubber, adhesive coated
Lockwasher: Spring steel with zinc plating
Hex nut: Brass with tin/zinc plating
orDering inFormation
(potential combinations)
Series 20: Mechanical Encoder, concentric shafts
Seal:
S = Sealed; A = Not Sealed
output code
angle of throw
(outer shaft)
Stop arrangement:
AC = all positions continuous rotation;
AF = all positions with fixed stop between first and last;
02 to 15: number of positions, if less than maximum
termination:
P = Pins; 02 to 25 = Cable Length
Stop arrangement (see above)
angle of throw
(inner shaft)
output code
2 0 S g 2 aC – g 2aC - p
output Code:
G = Gray
B = Binary
Q = Quadrature
angle of throw / max positions:
2 = 22.5° / 16 positions
0 = 30° / 12 positions
6 = 36° / 10 positions
5 = 45° / 8 positions
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
