SERIES 26
Binary and Gray Code
DIMENSIONS in inches (and millimeters)
Maximum Switch Angle
Positions A
8 67.5°
16 33.75°
Unless specied otherwise, all tolerances are ± .015 ( 0,38)
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
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–one per switch): 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
Additional Characteristics
Rotational Torque: 4 to 8 oz-in on a new
switch.
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-S-3785 (MIL-STD-202,
Method 213)
Grayhill part number and date
code marked on label. Customer
part number marked on request.
C
L
C
L
ANGLE A
.094 (2,39)
.203 ± .003
(5,16 ± 0,10)
A
CROSS FLATS
.500 ± .015
(12,7 ± 0,38) DIA.
POS. 0
OF BUSHING FLATS 1/4-28 UNF-2A THREAD
.025 ± .005
(0,64 ± 0,13)
3 PLACES
.180 (4,57)
.332 (8,43)
.957
(24,31)
REF.
.250 (6,35)
.375 (9,53)
.250 (6,35)
.125 ± .003 DIA.
(Ø 3,18 ± 0,10)
C
12
84
C
L
C
L
COMMON TERMINAL
.300
(7,62) .150 (3,81)
2 PLACES
.100 (2,54)
2 PLACES
.200 (5,08)
Stop Strength: 5 in-lbs minimum
Terminals: All switches are provided with
all 5 terminals, regardless of the number of
active positions.
Relative Humidity: 90-95% at 40oC for
240 hours (MIL-STD-202 Method 103, Test
Condition A)
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.
Shaft and Panel Seal
All switches are provided with a shaft and
panel seal.
Number of Part
Positions Number
16 Positions 26GSD22-01-1-AJS
8 Positions 26GSD45-01-1-AJS
Custom encoders with options such as: custom
code output, 1/4" shaft diameter, xed stops and
longer shaft and terminal lengths are avalable
by contacting the Grayhill sales ofce.
Gray Code Output–Adjustable Stop
ORDERING INFORMATION
Code
Position
CODE AND TRUTH TABLE
BCD Output* Gray Output*
1 2 4 8 1 2 4 8
1 0
2 1
3 2
4 3
5 4
6 5
7 6
8 7
9 8
10 9
11 10
12 11
13 12
14 13
15 14
16 15
*Dot indicates terminal tied to common.
Switch
Position
Available from your local Grayhill Distributor.
For prices and discounts, contact a local Sales
Ofce, an authorized local Distributor or Grayhill.
AVAILABLE CODES
• Hexadecimal
• Octal
• BCD (Adjusted)
• Quadrative
• Custom (4-Bit, 16 position maximum)
• RoHS Compliant
Number of Part
Positions Number
8 Positions 26ASD45-01-1-AJS
16 Positions 26ASD22-01-1-AJS
BCD Output–Adjustable Stop
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Optical and Mechanical
Encoders
Mechanical Encoders
