Mechanical Encoders
SERIES 26
Binary and Gray Code
DIMENSIONS
AVAILABLE CODES
• Hexadecimal
• Octal
• BCD (Adjusted)
• Quadrative
• Custom (4-Bit, 16 position maximum)
• RoHS Compliant
1/4-28 UNF-2A THREAD
.125 ± .003 DIA.
(Ø 3,18 ± 0,10)
in inches (and millimeters)
C OF BUSHING FLATS
L
C POS. 0
L
COMMON TERMINAL
.300
(7,62)
.150 (3,81)
2 PLACES
ANGLE A
.094 (2,39)
.250 (6,35)
.025 ± .005
(0,64 ± 0,13)
3 PLACES
.180 (4,57)
.332 (8,43)
.250 (6,35)
Angle
A
67.5°
33.75°
1
C
L
2
8 C 4
C
L
.203 ± .003
(5,16 ± 0,10)
ACROSS FLATS
.500 ± .015
(12,7 ± 0,38) DIA.
Maximum Switch
Positions
.375 (9,53)
.100 (2,54)
2 PLACES
.200 (5,08)
8
16
.957
(24,31)
REF.
Unless specified otherwise, all tolerances are ± .015 ( 0,38)
Grayhill part number and date
code marked on label. Customer
part number marked on request.
Switch
Position
Code
Position
Optical and Mechanical
Encoders
SPECIFICATIONS
Electrical Ratings
Rated:
25,000 cycles with logic compatible
loads. Make and break 200 mA.
Contact Resistance:
500 milliohms maximum
(less than 100 milliohms initially)
Insulation Resistance:
1000 megohms
minimum (10,000 megohms initially)
Dielectric Strength:
250 Vac minimum
Relative Humidity:
90-95% at 40
o
C for
240 hours (MIL-STD-202 Method 103, Test
Condition A)
Thermal Cycling:
per MIL-STD-202, Method
107, Test Condition A, with an exception of
-65°C as the low temperature
CODE AND TRUTH TABLE
BCD Output*
1
2
4
8
Gray Output*
1
2
4
8
Shaft and Panel Seal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
All switches are provided with a shaft and
panel seal.
Materials and Finishes
Panel Seal:
Silicone Rubber
Shaft Seal:
Fluorosilicone
Mounting Nut (mounting hardware–one
per switch):
Brass, tin/zinc-plated
Internal Tooth Lockwasher (mounting
hardware):
Steel,tin/zinc-plated
Detent Balls:
Carbon steel, nickel-plated
Detent Spring:
Pretinned music wire
Detent Rotor:
Thermoplastic
Shaft, Stop Arm and Stop Pins:
Stainless steel
Bushing:
Zamak II tin/zinc alloy, zinc-plated
Switch Base:
Diallyl phthalate
Printed Circuit Board:
NEMA Grade FR-4.
Terminals:
Brass, gold-plated over nickel plate
Contacts:
Copper alloy, gold-plated over
nickel plate
OPTIONS
Adjustable Stop Switches
The switch may have continuous rotation, or
be adjusted to limit the rotation. The panel
seal ring can be removed to expose the stop
pin holes on the front of the switch. Two stop
pins and panel seal o-ring are supplied with
the switch. One or both may be used to limit
the rotation as desired.
Custom encoders with options such as custom
code output, 1/4” shaft diameter, factory set
stops and longer shaft terminal lengths are
*Dot indicates terminal tied to common.
Additional Characteristics
Rotational Torque:
4 to 8 oz-in initial
Vibration Resistance:
10 to 55 Hz at
0.060" double amplitude; no damage and
no contact openings per MIL-STD-202,
Method 201A
Shock Resistance:
Passes medium
requirement MIL-DTL-3786 (MIL-STD-202,
Method 213)
Stop Strength:
5 in-lbs minimum
Series Code
Output Code:
G = Gray, A = BCD
26GSD22-01-1-16S-C
C = Continuous,
F = Fixed,
Blank = Adjustable
Sealed
D = Adujustable,
Blank = Continuous or Fixed
Stops:
Positions:
Poles: 1
Decks: 1
Angle of Throw:
22 = 22.5º, 45 = 45º
08S, 16S, or AJS for adjustable
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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