Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois

60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com

Mechanical Encoders

Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.

OPTIONS

Adjustable Stops

Set and reset stops to limit rotation. All

dimensions are the same as for fixed stop

switches. Switches are shipped with the stop

blades located to limit rotation to 11 switch

positions. For continuous rotation, remove both

blades. For limited rotation, remove the 2nd

(clockwise) blade and move it to the hole

located between the positions shown in the

Truth Tables. Removal of a plastic washer

provides access to the blades and slots.

Adjustable stop versions are available in

unsealed styles only.

Shaft and Panel Seal

Switches are available in sealed or unsealed

styles. For sealed style, the panel is sealed by

an o-ring at the base of the bushing. The shaft

is sealed by an o-ring inside of bushing. After

the switch is mounted, seals do not alter the

dimensions of the unsealed style.

Dec.

Switch

2nd

Output Terminal

No.

Pos'n.*

Pin**

1248

0

1

4-5

1

2

5-6

2

3

6-7

3

4

7-8

4

5

8-9

5

6

9-10

6

7

10-11

7

8

11-12

8

9

12-1

9

10

1-2

10

11

2-3

11

12

3-4

Indicates contact made to common

* The switch position number is the terminal location opposite the shaft flat; it is not the same as

the decimal number.

** To limit an adjustable stop switch to the decimal number shown, insert the second pin in the hole

lying between the 2 switch positions indicated.

TRUTH TABLES

Binary Code Decimal

Binary Code Decimal Complement

Electrical Rating

Rated: To make and break 125 mA 30 Vdc

resistive load for 25,000 cycles of operation.

Cycle: (1 cycle = 360° rotation and return)

Test conditions are standard atmospheric

pressure, 25°C and 68% relative humidity.

Contact Resistance: 20 milliohms initially,

300 milliohms maximum after life

Insulation Resistance: 50,000 megohms

initially, 10,000 megohms after life

Voltage Breakdown: 500 Vac between

mutually insulated parts

SPECIFICATIONS

Type Of

Maximum No.

BCD Output

BCD Complement

Switch

Of Positions

Unsealed

Sealed

Unsealed

Sealed

7

513360-7

513374-7

513361-7

513375-7

8

513360-8

513374-8

513361-8

513375-8

Fixed Stop

9

513360-9

513374-9

513361-9

513375-9

10

513360-10

513374-10

513361-10

513375-10

11

513360-11

513374-11

513361-11

513375-11

12

513360-12-F

513374-12-F

513361-12-F

513375-12-F

Continuous Rotation

12

513360-12-C

513374-12-C

513361-12-C

513375-12-C

Adjustable Stop

12

513385

———

513384

———

The -C suffix indicates continuous rotation. The -F suffix indicates a fixed stop between positions 1 and 12.

ORDERING INFORMATION

Materials and Finishes

Bases: Thermoset plastic

Detent Rotor: Nylon

Shaft, Stop Blades, Stop Arm, Thrust

Washer And Retaining Ring: Stainless steel

Detent Balls: Steel, nickel-plated

Bushing: Zinc, Tin-zinc-plated

Detent Spring: Stainless steel

Common Terminals and Rings: Brass, gold

plate .00003" minimum over silver plate .0003"

minimum

Terminals: Brass with silver contact surface,

gold-plated .00003"

Rotor Contact: Berillium copper with silver

contact surface

Shaft And Panel Seal: Silicone rubber

Mounting Hardware: One mounting nut, .089"

thick by .375" across flats, and one internal

tooth lockwasher are supplied with the switch.

Additional Characteristics

Contact Type: Wiping contacts

Shaft Flat Orientation: Switch position is

defined as that position that is opposite the

shaft flat. The location of the contacts in

relation to the shaft flat is shown on the circuit

diagram.

Terminals: Only the active position terminals,

as shown in the circuit diagram are supplied

with the switch. All common terminals are

supplied.

Stop Strength: 7.5 in-lbs minimum

Rotational Torque: 8 to16 in-oz

Bushing Mounting: Required for these

switches

Maximum Mounting Torque: 15 in-lbs.

Dec.

Switch

2nd

Output Terminal

No.

Pos'n.*

Pin**

1248

0

1

12-1

1

2

1-2

2

3

2-3

3

4

3-4

4

5

4-5

5

6

5-6

6

7

6-7

7

8

7-8

8

9

8-9

9

10

9-10

10

11

10-11

11

12

11-12

Encoder

8