Optical Encoders
SERIES 61A
Custom, Absolute
FEATURES
• Absolute Position Sensing
• 3, 4, or 5-Bit Custom Output Coding
• Available in 8, 16 and 32 detent positions
• Fixed Stops Only
• Angles of Throw to 45° (Design Specifications
Will Dictate the Angle of Throw)
DIMENSIONS
in inches (and millimeters)
.320±.005
(BUSHING FLATS)
Optical and Mechanical
Encoders
.875±.005
SQUARE
.218±.005
.562
3 PLACES
.331
.250
3/8-32 UNEF 2A
THREAD
.248/.250
MOUNTING
SURFACE
.688
3 PLACES
.093
.780±.025
CONNECTOR IS
MOLEX P/N
14-56-2074
6.000±.300
UNLESS OTHERWISE SPECIFIED, DIMENSION TOLERANCES ARE AS FOLLOWS: LINEAR ±.010 (0,25), DIAMETERS ±.010 (0,25), ANGULAR ±5
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical Encoders
CIRCUITRY
+5 VOLTS
R*
7
TRUTH TABLE
3 BIT, 8 POSITION
Position
1
6
5 BIT, 32 POSITION
B4
Position
1
2
3
4
5
6
7
8
9
10
11
12
B0
B1
B2
B3
B4
B2
B3
BI 0
T
R*
2
3
4
5
BI 1
T
R*
5
6
7
8
BI 2
T
R*
4
INDICATES LOGIC HIGH
BLANK INDICATES LOGIC LOW
BI 3
T
R*
3
4 BIT, 16 POSITION
Position
1
2
3
B1
B2
B3
B4
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
BI 4
T
2
GR O UND
1
4
5
6
7
8
9
10
11
12
13
14
15
16
* EX TERN AL PU LL- P R ESI
U
STO R S R EQ U I ED FO R OPE R ATI N ( 7k)
R
O
4.
Optical and Mechanical
Encoders
INDICATES LOGIC HIGH
BLANK INDICATES LOGIC LOW
INDICATES LOGIC HIGH
BLANK INDICATES LOGIC LOW
SPECIFICATIONS
Ratings
Operating Voltage:
5 ±.25V DC
Supply Current:
85 mA maximum at 5V DC
Life:
1 million cycles of operation; 1 cycle is
rotation through all positions and a full return
Rotational Torque:
12 ±4 in-oz (initial)
Output High:
3.8V minimum for CMOS &
HCMOS; 2.7V minimum for TTL
Output Low:
0.8V maximum
Shaft Push Out Force:
25 lbs.
Mounting Torque:
10 in-lb maximum
Load Current:
5 mA maximum per channel
Logic Rise and Fall Times:
30 mSec typical
Environmental
Operating Temp. Range:
-40°C to +85°C
Storage Temp. Range:
-55°C to +100°C
Vibration:
MIL-STD 202, method 204, cond. B
Mechanical Shock:
100 g’s, 6 ms, half Sine
12.3 ft/s and 100 g’s, 6 ms, sawtooth, 9.7 ft/s
Humidity:
90-95% relative humidity at
40°C for 96 hrs.
Materials and Finishes
Detent Housing:
Stainless Steel
Bushing:
Brass, tin/zinc plated
Shaft:
Stainless steel
Detent Balls:
Steel, nickel-plated
Code Housings:
Nylon 6/10
Backplate:
Nylon 6/10
Aperture:
Chemically etched stainless steel with
black oxide finish
Rotor:
Electroformed nickel and chemically
etched stainless steel with black oxide finish
Detent Springs:
Tinned music wire
PC Boards:
NEMA grade FR-4
Through Bolts:
Stainless steel, unplated
Through Bolt Nuts:
Stainless steel
Mounting Hardware:
One brass, tin/zinc-
plated nut and one stainless steel, zinc-plated
lockwasher supplied with each switch. Nut is
0.094 inch thick by 0.562 inch across flats.
ORDERING INFORMATION
Series
Style:
A = Absolute position sensing
Number of positions:
32 = 32 positions with 10° of throw
16 = 16 positions with 18° of throw
8 = 8 positions with 36° of throw
61A32-060
Termination:
060 = 6.0 inches cable terminated with Molex connector P/N 14-56-2074.
Available from your local Grayhill Component Distributor.
For prices and discounts, contact a local sales office, an authorized local distributor, or Grayhill direct.
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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