Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois

60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com

Mechanical Encoders

Series 25: Multi-deck

Sealed or non-sealed: S = Shaft and panel seal; No letter = no seal

Terminal structure: P = PC, perpendicular to shaft; R = PC, rear facing (one deck

only); F = PC, front facing (one deck only).

Angle of throw (determines the maximum number of positions):

10 = 10°, 36 positions; 11 = 11.25°, 32 positions; 12 = 12°, 30 positions;

15 = 15°, 24 positions; 18 = 18°, 20 positions; 22 = 22.5°, 16 positions;

30 = 30°, 12 positions; 45 = 45°, 8 positions; 60 = 60°, 6 positions;

90 = 90°, 4 positions.

25BSP22–Q–1–16 C

Stop arrangement: For switches with maximum positions, add C for continuous rotation;

add F for stop between first and last. No notation required for less than maximum

positions.

Number of positions: Maximum is dependent on the angle of throw. Minimum is two.

Number of decks: One through four possible.

Code output:

B = Binary available in 22.5°

Q = Quadrature

G = Gray available in 22.5°

complement and gray code outputs. Contact Grayhill Sales for availability.

SPECIFICATIONS

Electrical Ratings

Switching Loads: 150 mA at 120 Vac,

resistive; 150 mA at 28 Vdc, resistive

Current Carrying Capacity: 250 mA at 28 Vdc,

resistive

Contact Resistance: 75 m

maximum after

life

Insulation Resistance: 1000 m

minimum

between terminals and shaft

Voltage Breakdown: 1000 Vac minimum

between terminals and shaft

Life Expectancy: 50,000 cycles at rated loads

Contacts: Shorting

Materials and Finishes

Bushing: Die cast zinc alloy, tin-zinc plated

Mounting Hardware: plated brass

Decks, Deck Separators, End Plate:

Thermoplastic

Contacts and Terminals: Gold, silver, nickel-

plated beryllium copper

Shaft, Stop Blades: Stainless Steel

Detent Balls: Steel, nickel-plated

Rivets: Brass, zinc-plated

Mechanical Ratings

Stop Strength: 10 in-lbs minimum

Rotational Torque: 4-20 in-oz, dependent on

the number of decks

Operating Temperature Range: -65°C to

+85°C

Non-Turn Device: Flatted mounting bushing,

.375" dia. x .320"

Package Size: .865" square

Termination: PC terminals, .100" on center.

Decks are .200" apart.

ORDERING INFORMATION

Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.

Control knobs available, see page I-57.

Encoder

3