Special Function Rotary Switches
SERIES 09, 42, 44, 50, 51
Isolated Position
FEATURES
• Protected Switch Positions For
Safety, Calibration, or Stand-by
• Choice of Push- or Pull-To-Turn
•
1
/
2
" Diameter, 200 mA and
1" Diameter, 1 Amp Switch
• 10,000 Cycles of Operation
DESCRIPTION
An isolated position is one which cannot be reached by the normal rotation. An additional action is
required by the operator. It could be either Push-To-Turn, or Pull-To-Turn. After the switch is rotated
to the isolated position, releasing the shaft locks the switch in that position. Push or pull again to
rotate the switch again.
Use isolated positions to protect a switch position from indiscriminate rotation. Such safety positions
might include “calibrate”, “off” and/or “stand-by”.
DIMENSIONS
Series 09
DIM. A + .046 (1,17)
–.020 (0,51)
.062 (1,57)
Series 50 & 51
SOLDER
LUGS
Series 42 & 44
DIM. A + .046 –.020
(+ 0,05 –0,51)
DIM. A
Rotary Switches
1 Deck
2 Decks
3 Decks
4 Decks
DIM. A
PC
TERMINALS
Dimension A
1.228
1.496
1.764
2.032
(31,19)
(38,0)
(44,81)
(51,61)
Dimension A
Solder Lug
PC Style
.893 ± .025 (22,68 ± 0,64)
.897 ± .025 (22,78 ± 0,64)
1 Deck
2 Decks
3 Decks
4 Decks
Dimension A
1.371
1.717
2.063
2.409
(34,82)
(43,61)
(52,40)
(61,19)
Grayhill part number and date code marked on label.
Customer number marked on request.
EXTERNAL DIFFERENCES
The isolated position mechanism increases the
depth of the Series 50 and 51 by 0.217" (5,51
mm). All other dimensions remain unchanged.
In Series 9, 42 and 44, it has the appearance of
an additional deck section without terminals,
located directly behind the detent system.
SPECIFICATIONS
Electrical Ratings
The switching elements, and therefore ratings,
are the same in an isolated position switch as in
a conventional rotary switch. Mechanical life is
also the same.
Materials and Finishes
Materials and finishes for the isolation
mechanism are listed here.
Series 50 and 51
Housing:
Zinc casting, tin/zinc-plated
Shaft:
303 stainless steel
Stop Pin and Stop Post:
303 stainless steel
Spring:
Tinned music wire
Series 09
Housing:
Phenolic for style A; Diallyl, for M
Shaft:
303 stainless steel, electro-polished
Stop Pin and Stop Post:
303 stainless steel
Spring:
Tinned music wire
Series 42 and 44
Housing:
Diallyl per MIL-M-14
Shaft:
303 stainless steel
Lock Plate:
302 stainless steel
Lock Arm:
316 stainless steel
Lock Post:
Brass, tin/zinc-plated
Compression Spring:
Tinned music wire
Additional Characteristics
Shaft Movement or Vertical Travel:
Series 09
.062 ± .020 (1,57 ± 0,51)
Series 42 & 44
.070 ± .020 (1,78 ± 0,51)
Series 50 & 51
.080 ± .020 (2,03 ± 0,51)
Push or Pull Force Required:
Series 09
1.75 ± .5 lbs
Series 42 & 44
2 ± .5 lbs
Series 50 & 51
2 ± .5 lbs
Stops:
Single pole per deck switches with the
maximum number of positions are supplied with
stops only on request: 12 positions in 30° throw,
10 in 36°, and 8 in 45°.
Stop Strength:
Approximately 7.5 pound-inches
for the isolated position stop.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Special Function Rotary Switches
CHOICES AND LIMITATIONS
Standard
Style
Military
Style**
Style
Description
Angle Of
Throw
No. Of
Decks
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 03
Poles Per
Deck
1
2
3
4
5
6
Positions
Per Pole
02 to 12
02 to 06
02 to 04
02 or 03
02
02
Shorting Or
Non-Shorting
N or S
N or S
N or S
N or S
N or S
N or S
09A
09M
Solder Lug
30°
42A
42S
—
—
42M
—
42H
42HS
Solder Lug
Sealed
125° Temperature Rating
125° Temp Rating, Sealed
36°
01 to 04
01 to 04
1
2
02 to 10
02 to 05
N or S
N or S
30°
44A
44S
—
—
44M
—
44H
44HS
Solder Lug
Sealed
125° Temperature Rating
125° Temp Rating, Sealed
45°
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 03
01 or 02
01 or 02
1
2
3
4
5
6
1
2
3
4
02 to 12
02 to 06
02 to 04
02 or 03
02
02
02 to 08
02 to 04
02
02
N or S
N or S
N or S
N or S
N or S
N or S
N or S
N or S
N or S
N
--
--
--
--
--
--
--
--
50C
50CP
50M*
50MP*
51C
51CP
51M*
51MP*
Solder Lug
PC Mount
Solder Lug, Sealed
Sealed, PC
Solder Lug
PC Mount
Solder Lug, Sealed
PC Mount, Sealed
36°
01
1
2
02 to 10
02 to 05
N or S
N or S
30°
01
1
2
3
4
02 to 12
02 to 06
02 or 03
02 or 03
N or S
N or S
N or S
N or S
Rotary Switches
*(Pull-to-Turn only) **For specifics on military qualified products, see Standard Switch Pages.
CONVENTIONAL NUMBERS
Start by creating a conventional switch number
in the manner which follows:
Series & Style
Angle of Throw
Number of Decks
09A30-01-1-12N
Type of Contacts
Shorting = S
Non-Shorting = N
Positions Per Pole
Poles Per Deck
Note: No stop arrangement suffix is needed.
See Describing Stops.
Let's isolate position 1 and position 2 from all
other positions and from each other. We indicate
isolation posts as shown here:
12P1P2P3 4 5 6 7 8 9 10 11 12
To isolate just position 1, describe like this:
12P1P2 3 4 5 6 7 8 9 10 11 12
To isolate positions 1 and 2 from all other
positions, but not from each other, do this:
12P1 2P3 4 5 6 7 8 9 10 11 12
ORDERING INFORMATION
Indicate this as a SPECIAL switch to ensure
that no error is made when the order is entered.
Sample part number:
SPECIAL
09A30-04-1-12N
PULL 12P1P2P3 4 5 6 7 8 9 10 11 12
DESCRIBING STOPS
When a 1-pole switch has less than the maximum
number of positions, consider also the stop
system. Following is the arrangement for a 6
position switch with the position 1 isolated.
STOP 1P2 3 4 5 6 STOP
The word “STOP” indicates the conventional
switch stops, which limit rotation to positions 1
through 6. To isolate position 1 we insert only
one isolation post–between terminals 1 and 2.
The stop system already prevents rotation
beyond terminal 1.
In multi-pole switches, the stop system and
isolation system described for the first pole,
automatically affects the other poles. In the
example above, isolating position #1 on the first
pole isolates the first position (terminal #7) of
the second pole. See Standard Switch Pages
for a 2 pole circuit diagram for a 30° throw
switch.
This sample part number orders a Series 9
standard style, four deck, one pole per deck,
twelve positions per pole rotary switch with non-
shorting contacts and isolation posts between
positions 12 and 1, between 1 and 2, and
between 2 and 3.
This lengthy order number is required to prevent
any possible confusion in ordering the switch.
When we receive your order, we will assign a
special “short form” part number to facilitate
future identification of this special switch. This
number is sequentially assigned as the need
arises, and is non-descriptive. A typical “short
form” special part number might be 09YY12345.
Contact Grayhill for price.
Not available through Distributors.
DESCRIBING POSITIONS
The Grayhill system for isolating positions lets
you choose the positions to be isolated. Grayhill
inserts isolation posts next to the positions to be
isolated. Consider a continuous rotation switch
of the Series 09A with a 30° angle of throw. The
terminals are listed here from 1 through 12 with
a space between each to indicate where isolation
posts might be inserted.
12 1 2 3 4 5 6 7 8 9 10 11 12
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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