Namco Controls EA170 Catalog Page

Double Pole

Limit

Butt

Standard Environment

Switches

Standard (EA170)

Double pole, double break, double
throw, heavy duty limit switch having
mechanical travel of 10° to trip and with
two normally open and two normally
closed circuits. Can be furnished with
standard, wide or long mounting.

Short Travel (EA170)

Limit Switches

With mechanical travel of 6-1/2°
required to trip, this heavy duty limit
switch operates with two normally open

and two normally closed circuits. Can be
furnished with standard, wide or long
mounting.

Reverse Shaft (EA170)

Designed for applications where a
reverse shaft is essential in operation.
This series provides the same snap
locking action of the other series of
EA170 Snap-Lock Switches. Can be
furnished with standard, wide or long
mounting.

Contacts

EA700 (Standard)

The versatility of the Snap-Lock
mechanism is gained through the use of
a series of uniquely designed cams. The
cam and cam mechanism allow features
such as bi-directional operation and
generous overtravel. These features make
the EA700 Series one of the most
popular. Can be furnished with Standard,
Wide or Long mounting.

EA170 Double Pole 2 N.O. - 2 N.C. / Butt Contacts / Rocker Type

Standard Wide Long A B C D E F
Mounting Mounting Mounting Dir. Of Trip Reset Recom. Total Min. Travel Overall Torque Contact Data

Model No. Model No. Model No. Operation Travel Travel Travel Travel to Maintain Travel (inch lbs) Config. Drawing

STANDARD TRAVEL

EA170-11100 EA170-21100 EA170-31100 CW 10° 8 ° 13° 37° --23A1
EA170-12100 EA170-22100 EA170-32100 CCW 10° 8° 13° 37° --23B1
EA170-13100 EA170-23100 EA170-33100 Maintain 10° 8° 13° 37° --10-1

SHORT TRAVEL

EA170-14100 EA170-24100 EA170-34100 CW 6° 30’ 4° 7° 36° --32A1
EA170-15100 EA170-25100 EA170-35100 CCW 6° 30’ 4° 7° 36° --32B1
EA170-16100 EA170-26100 EA170-36100 Maintain 6° 30’ 4° 7° 36° - - 10.5 - 1

STANDARD TRAVEL - REVERSE SHAFT

EA170-41100 EA170-51100 EA170-61100 CW 10° 8 ° 13° 37° --30A1
EA170-42100 EA170-52100 EA170-62100 CCW 10° 8° 13° 37° --30B1
EA170-43100 EA170-53100 EA170-63100 Maintain 10° 8° 13° 37° --23-1

Angle Angle Angle Angle Angle Angle

254

EA700 Double Pole Standard 2 N.O. - 2 N.C. / Neutral Position 4 N.O. or 4 N.C. / Butt Contacts

Standard Wide Long A B C D E F
Mounting Mounting Mounting Dir. Of Trip Reset Recom. Total Min. Travel Overall Torque Contact Data

Model No. Model No. Model No. Operation Travel Travel Travel Travel to Maintain Travel (inch lbs) Config. Drawing

STANDARD TRAVEL / CAM ACTION

EA700-20000 EA700-50000 EA700-80000 CW 18° 14° 30° 90° --27C1
EA700-20001 EA700-50001 EA700-80001 CCW 18° 14° 30° 90° --27D1
EA700-20100 EA700-50100 EA700-80100 CW/CCW 18° 14° 30° 90° --27E1

NEUTRAL POSITION / CAM ACTION - ALL CONTACTS OPEN

EA700-25000 EA700-55000 EA700-85000

See Operating Levers Section

CW 11° 9° 45 ° 90° - - 19.5

CCW 35° 13° 45° 90° --15

Angle Angle Angle Angle Angle Angle

F1

Namco Controls Corporation • Mayfield Village, OH 44143 • [phone] • Fax: [phone]

EA700 Double Pole Standard

EA170/EA700

2 N.O. - 2 N.C. / Neutral Position 4 N.O. or 4 N.C. / Butt Contacts / Cam Action

Standard Wide Long A B C D E F

Mounting Mounting Mounting Dir. Of Trip Reset Recom. Total Min. Travel Overall Torque Contact Data

Model No. Model No. Model No. Operation Travel Travel Travel Travel to Maintain Travel (inch lbs) Config. Drawing

NEUTRAL POSITION - ALL CONTACTS OPEN

EA700-25102 EA700-55102 EA700-85102

NEUTRAL POSITION - ALL CONTACTS CLOSED

EA700-25108 EA700-55108 EA700-85108

MAINTAINED CONTACT - MAINTAINED CONTACTS & LEVER POSITION

EA700-26000 EA700-56000 EA700-86000

MAINTAINED CONTACT - MAINTAINED CONTACTS - LEVER RETURNED

EA700-26700 EA700-56700 EA700-86700

CCW 31° 12° 45° 90° - - 20.5

CCW 31° 12° 45° 90° - - 20.5

CCW 25° 25° 60° 124° 54° 56° 12

CCW 16° 30° 45° 90° 26 ° - 16.5

Contact Configurations

CIRCUIT A

CW

H
F

D
B

Initial

CCW

G
E

C
A

CIRCUIT B

CW

Angle Angle Angle Angle Angle Angle

CW 31° 22° 45 ° 90° - - 16.5

CW 31° 22° 45 ° 90° - - 16.5

CW 55° 22° 60 ° 116° 55° 64° 6

CW 30° 26° 45 ° 90° 30° -15

Operational Data Drawings

H
F

D
B

Initial

DRAWING #1

CCW

G

D

E
C

A

C

C

A

A

B

D

B

G1

H1

I2

I3

DRAWING #2

CIRCUIT C

CW

H
F

D
B

Initial

CCW

G
E

C
A

CIRCUIT D

CW

H
F

D
B

Initial

CW OperatingCCW Operating

CCW

G
E

C
A

Initial
Position

C

A

E

D

F

B

Initial
Position

F

A

Limit Switches

E

C

B

D

CIRCUIT E CIRCUIT F

CW

Initial

H
F

D
B

CCW

CW

G
E

C
A

CIRCUIT G CIRCUIT H

CW

Initial

H
F

D
B

CCW

CW

G
E

C
A

CIRCUIT I

CCW Operating

CW

Initial

H
F

D
B

CCW

CW

G
E

C
A

Initial

H
F

D
B

G
E

C
A

Initial

H
F

D
B

G
E

C
A

CW Operating

Initial

H
F

D
B

G
E

C
A

CCW

CCW

CCW

To change switch operation from CW operating to CCW
operating, operate switch through angle E. Remove lever
and reset at initial position.

DRAWING #3

CW OperatingCCW Operating

D

Initial
Position

C

B

A

D

D

Initial
Position

EE

B

C

A

To change switch operation from CW operating to CCW
operating, operate switch through angle E.

Namco Controls Corporation

[phone] • FAX [phone] • namcocontrols.com

Mayfield Village, OH 44143

For technical assistance, call 1-800-NAMTECH

D

255

Double Pole

Limit

Butt

Standard Environment

Switches

Common Switch Characteristics

DOUBLE POLE, STANDARD ENVIRONMENT, BUTT CONTACTS

EA170 EA700

NEMA Enclosure Type 1, 4, 13
Housing Material Zinc/Al. Zinc
Ambient Temperature Range* -20°C to +90°C

Limit Switches

Shipping Weight 3.5 lbs. approx. 4 lbs. approx.
Lever Adjustment EA170 Std. Shaft:

Contacts Butt, Silver Alloy, Form Z

*Some high temperature (+20°C to 180°C) and low temperature

(-40°C to +90°C) versions available. Contact factory.

7°30’ Increments
thru 167° 7°30’ Increments

EA170 Rev. Shaft:

7°30’ Increments
thru 360°

Contacts

Continuous Current Rating - Amperes

VOLTAGE AC DC

125 20.0 5.0
250 15.0 1.5
480 10.0 ­600 5.0 -

75-100% Power Factor

thru 360°

EA170 (Standard) Series Drawings

STANDARD MOUNTING PLATE

2.25"
5/16 - 18NC

(57.2)

0.56 Deep
Four Holes

0.375"
(9.5)

4.13"

(104.9)

0.56"

(14.2)

0.093"
(2.4)

0.093"
(2.4)

3.04"

(77.2)

0.95"

1.03"

(24.1)

(26.2)

6.58"

(167.1)

0.81"

(20.6)

1 – 11-1/2 NPT
7-1/2 Threads

(167.1)

0.125"
(3.2)

6.58"

0.125"
(3.2)

0.99"

(25.1)

1.56"

(39.6)

2.56"

(65.0)

1.55"

(39.4)

WIDE MOUNTING PLATE

48 Serrations - Equally Spaced

1.56"

0.495/0.490 O.D.

(39.6)

0.255/0.260 Dia.
Four Holes

3.69"

0.32 R.

(93.7)

Dimensions: inches/(mm)

4.31"

(109.5)

0.94"

(23.9)

3.81"

(96.8)

0.69"
(17.5)

1.63"

(41.4)

LONG MOUNTING PLATE

6.58"

(167.1)

1.56"
(39.6)

0.125"
(3.2)

0.255/0.260 Dia.
Four Holes

2.25"

(57.2)

2.87"

(72.9)

0.50"

(12.7)

5.63"

(143.0)

0.44"
(11.2)

(167.1)

6.58"

256

Namco Controls Corporation • Mayfield Village, OH 44143 • [phone] • Fax: [phone]

EA170 (Reverse Shaft) Series Drawings

WIDE MOUNTING PLATESTANDARD MOUNTING PLATE

EA170/EA700

LONG MOUNTING PLATE

0.093"
(2.4)

3.40"

5/16 - 18NC

(86.4)

0.75"

(19.1)

0.75"

(19.1)

0.125"
(3.2)

0.99"

(25.1)

1.56"

(39.6)

2.56"

(65.0)

1.55"

(39.4)

0.56 Deep
Four Holes

0.375"
(9.5)

4.13"

(104.9)

0.56"

(14.2)

0.093"
(2.4)

0.093"
(2.4)

3.04"

(77.2)

EA700 Series Drawings

STANDARD MOUNTING PLATE

0.44"

(11.2)

0.92"

(23.4)

3.19"

(81.0)

0.50"

(12.7)

0.68"

(17.3)

48 Serrations
Equally Spaced

0.495/0.490 O.D.

0.95"

1.03"

(24.1)

(26.2)

6.58"

(167.1)

0.81"

(20.6)

1 – 11-1/2 NPT
7-1/2 Threads

48 Serrations - Equally Spaced

0.495/0.490 O.D.

1.56"

(39.6)

6.58"

(167.1)

0.125"
(3.2)

1.31"

1.06"

(33.3)

(26.9)

0.255/0.260 Dia.
Four Holes

3.69"

0.32 R.

(93.7)

(109.5)

Dimensions: inches/(mm)

0.53"

(13.5)

0.94"

(23.9)

0.69"

(17.5)

3.81"
(96.8)

4.31"

0.260/0.255 Dia.
Four Holes

0.28"
(7.1)

1.63"
(41.4)

6.58"

(167.1)

1.56"

(39.6)

0.125"
(3.2)

LONG MOUNTING PLATEWIDE MOUNTING PLATE

0.66"

(16.8)

0.255/0.260 Dia.
Four Holes

0.260/0.255 Dia.
Four Holes

2.25"

(57.2)

2.87"
(72.9)

0.41"
(10.4)

0.50"

(12.7)

5.63"

(143.0)

0.44"
(11.2)

(167.1)

6.58"

Limit Switches

(66.8)

7.06"

(179.3)

0.125"

2.63"

(3.2)

1/4–20 Thd.

0.38 Deep

Four Holes

1.59"

(40.4)

2.60" Max.
(66.0)

1-11 1/2 NPT

Pipe T ap

1.12"

(28.4)

2.25"

(57.2)

2.28"

(57.9)

4.94"

(125.5)

0.02"

(0.51)

0.81"

(20.6)

2.81"

(71.4)

3.25"

(82.6)

Dimensions: inches/(mm)

4.38"

(111.3)

0.22"
(5.6)

4.94"

(125.5)

2.25"

(57.2)

1.81"

(46.0)

6.41"

(162.8)

0.22"
(5.6)

7.06"

(179.3)

Namco Controls Corporation

Mayfield Village, OH 44143

[phone] • FAX [phone] • namcocontrols.com

For technical assistance, call 1-800-NAMTECH

257