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
Optical Encoders
SPECIFICATIONS
Electrical Ratings
Operating Voltage: 5.0 ±.25 Vdc
Supply Current: 50 mA maximum at 5 Vdc
Logic Output Characteristics:
Output Type: 2-bit gray code with channel A
leading channel B by 90° ± 45° when the shaft is
turned clockwise
Power Consumption: 250 mW maximum
Rise/Fall Times: (25" standard cable ASM/
13.3 PF measurement probe)
Rise Time: 1.0 microseconds typical
Fall Time: .440 microseconds typical
Mechanical Ratings
Mechanical Life: 10 million revolutions
Mounting Torque: 20 in-lbs maximum
Operating Torque: 1.5 in-oz maximum Shaft
Push Out Force: 50 lbs minimum
Rotational Torque: 1.5 in. oz. max.
Terminal Strength: 5 lbs terminal pull-out
force minimum (pinned version)
Environmental Ratings
Operating Temperature Range: -40°C to 85°C
Storage Temperature Range: -55°C to 100°C
Relative Humidity: 90-95% at 40°C for 96 hours
Vibration Resistance: Harmonic motion with
amplitude of 15g, within a varied 10 to 2000 Hz
frequency for 12 hours per MIL-STD-202, Method
204
Mechanical Shock: Test 1: 100g for 6 mS, half-
sine wave with velocity change of 12.3 ft/s. Test
2: 100g for 6 mS, sawtooth wave with velocity
change of 9.7 ft/s.
Materials and Finishes
Bushing: Zinc plated brass
Housing: Nylon (Hiloy 610B)
Shaft: Stainless steel
Code Rotor: Chemically etched stainless steel/
electroformed nickel
Printed Circuit Board: NEMA Grade FR-4.
Five microinches minimum gold over 100
microinches minimum nickel over copper
Backplate: Nylon (Hiloy 610B)
Header: Phosphor bronze, 200 microinches tin
over 50 microinches nickel (pinned version)
Retaining Ring and Thrust Washers:
Stainless steel
Photo Sensor: Planar silicon
Infrared Emitter: Gallium aluminum arsenide
Cable: 26 AWG, stranded/tinned wire, PVC
coated on .100 (2,54) centers (cabled version)
Connector:
Housing: glass-filled polyester 94V-0 , black
Terminals: 15 microinches gold in select area
over 50 microinches minimum
ACCESSORIES
Non-turn Washers
The Series 61S bushing has a non-turn keyway
to prevent rotation of the switch body when the
panel is cut to fit. Another way to keep the
switch from turning is to use a nonturn washer.
Part Number 50J1066: 302-2B stainless steel
Part number 12C1087-1: cadium-plated
DIMENSIONS In inches (and millimeters)
Part Number: SHH694-11 (.250" shaft) Part Number: 12C1087-1 (.250" shaft)
Part Number SHH694-11: 302-2B stainless
steel, no plating
Shaft and Panel Seal
For shaft and panel seal version, the shaft is
sealed by an o-ring inside the bushing. The
panel is sealed by a flat gasket .045" thick at
the base of the bushing. The panel seals will
increase the behind panel dimension by .020"
Series
Style: S = unsealed, SS = sealed
Cycles: per channel per revolution = 50, 64, 75, 100, 128
61S128-2-025
Termination: Blank (no dash or numbers): pins as described in drawing.
Cable Termination: 020 = 2.0" minimum to 250 = 25" maximum. Provided in increments of 1/2".
Example: 035 = 3.5", 060 = 6". Cable is terminated with standard Molex part no. 14-56-3056.
Use any standard .100 center 5-pin header to interface with cable.
Shaft/Bushing: 1 = 0.125" shaft and 0.250" bushing; 2 = 0.250" shaft and 0.375" bushing
ORDERING INFORMATION
Available from your local Grayhill Component Distributor. For prices and discounts, contact a local Sales Office, an authorized local
Distributor, or Grayhill.
to .040", when the switch is mounted. The
panel seal is silicon rubber. The shaft seal is an
o-ring per MIL–P–5516B.
OPTIONS
Contact Grayhill for custom terminations, shaft
and bushing configurations, and resolutions.
Control knobs are also available.
Part Number: 50J1066 (.125" shaft)
CIRCUITRY AND WAVEFORM Standard Quadrature 2-Bit Code
