Optical Encoders
SERIES 61S
High Resolution, 5/8" Package
FEATURES
• Compact, 5/8" Package
• .125" or .250" Shaft Diameter
• 10 Million Rotational Cycles
• Compatible with CMOS, TTL and
HCMOS Logic
• Available in 50
and
64
Quadrature Cycles per Revolution
• Choices of Cable Length and
Terminations
• Drop-In Industry Replacement
DIMENSIONS
In inches (and millimeters)
Pin Version: .125" Shaft
APPLICATIONS
• Audio Mixing Consoles
• Medical Equipment
• Test and Measurement Equipment
Optical and Mechanical
Encoders
Cable Version: .125" Shaft
Pin Version: .250" Shaft
Cable Version: .250" Shaft
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Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical Encoders
CIRCUITRY AND WAVEFORM
Standard Quadrature 2-Bit Code
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
Rotational Torque:
1.5 in. oz. max.
Terminal Strength:
5 lbs terminal pull-out
force minimum (pinned version)
Environmental Ratings
Operating Temperature Range:
-40°Cto85°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.
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
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
Optical and Mechanical
Encoders
ORDERING INFORMATION
Series
Style:
S = unsealed, SS = sealed
Cycles:
per channel per revolution = 50
or 64
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
Available from your local Grayhill Component Distributor.
For prices and discounts, contact a local Sales Office, an authorized local
Distributor, or Grayhill.
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
Part Number SHH694-11:
302-2B stainless
steel, no plating
to .040", when the switch is mounted. The
panel seal is silicon rubber. The shaft seal is an
o-ring per MIL–P–5516B.
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"
OPTIONS
Contact Grayhill for custom terminations, shaft
and bushing configurations, and resolutions.
Control knobs are also available.
DIMENSIONS
In inches (and millimeters)
Part Number: 50J1066 (.125" shaft)
Part Number: SHH694-11 (.250" shaft)
Part Number: 12C1087-1 (.250" shaft)
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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