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
Mechanical Encoders
SERIES 51
Binary or Binary
Complement Code
CIRCUIT DIAGRAMS
Switch is viewed from the shaft end and shown
in switch position number 1, which is decimal
number zero and BCD number zero.
BCD BCD Compleme
nt
10
9
8
7
6
C2
5
4
3
2
1
12
11
C3
C1
4 OUTPUT
1 OUTPUT
2 OUTPUT
8
OUTPUT
TIED TOGETHER
ON PC BOARD
COMMON
ROTATING
CONTACTS
TIED TOGETHER
ON PC BOARD
TIED TOGETHER
ON PC BOARD
10
9
8
7
6
C2
5
4
3
2
C1
1
12
11
C3
4 OUTPUT
1 OUTPUT
2 OUTPUT
8
OUTPUT
TIED TOGETHER
ON PC BOARD
COMMON
ROTATING
CONTACTS
TIED TOGETHER
ON PC BOARD
TIED TOGETHER
ON PC BOARD
TIED TOGETHER
ON PC BOARD
Indicates Terminal is present.
Indicates Terminal is omitted.
Note: Connections must be made on PC board to
generate code output.
Switch position numbers do not correspond to the
decimal input or binary output. See Truth Tables.
FEATURES
PC Mount, 30° Angle of Throw
2 to 12 Positions
.562" Diameter, 200 mA
Shaft and Panel Seal
Adjustable Stop Versions
DIMENSIONS In Inches (and millimeters)
.093 ± .005
(2,36 ± 0,13)
105?
SHAFT
FLAT
C
L
.203 ± .003
(5,16 ± 0,08)
? .562 + .025
–.015
(14,27 + 0,64
– 0,38)
87 65
GRAYHILL
? .125 ± .002
(3,18 ± 0,05)
.250 + .020 – .015
(6,35 + 0,51 –0,38)
.375 ± .015
(9,53 ± 0,38)
.250 ± .015
(6,35 ± 0,38)
.537 + .020 –.030
(13,64 + 0,51 –0,76)
1/4-28 UNF-2A
THREAD
.125 + .015
–.020
(3,18 + 0,38
–0,51)
.035 (0,89)
REF.
COMMON
POLE 1
COMMON
POLE 3
? .382 (9,70) TERMINAL
CIRCLE OF CENTERS
COMMON
POLE 2
? .232 (5,89)
COMMON CIRCLE
OF CENTERS
.020 ± .003
(0,51 ± 0,08)
.062 ± .004
(1,57 ± 0,10)
.125± .015
(3,18 ± 0,38)
? .025 ± .002
(0,64 ± 0,05)
.125± .015
(3,18 ± 0,38)
.020 ± .003
(0,51 ± 0,08)
See circuit
diagrams for
omitted terminals.
All switches are provided with PC mount terminals.
Grayhill part number and date code marked on label. Customer part number marked on request.
PC TERMINAL DETAIL PC COMMON DETAIL
Encoder
65
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