Cutler Hammer, Div of Eaton Corp Key Interlock Switches Data Sheet

1

Safety Products
Key Interlock Switches — NEMA Solenoid Models

Key Interlock Switches
NEMA Solenoid Models

Contents

Overview . . . . . . . . . . . . . . . . . . . . . 1

Model Selection, Switches . . . . . . . 2

Model Selection,

Actuating Keys. . . . . . . . . . . . . . . . 3

Model Selection,

Accessories . . . . . . . . . . . . . . . . . . 3

Specifications. . . . . . . . . . . . . . . . . . 3

Dimensions . . . . . . . . . . . . . . . . . . . 4

The E48 Safety Key Interlock Limit
Switch with solenoid latching is
designed to be used with movable
guards or covers which must be
closed for operational safety. The
key portion of the switch is affixed
to the movable door, cover or other
such guard. The switch itself is
mounted to a rigid portion of the
machine. The key is locked in place
when inserted in the switch until the
solenoid is energized. Once the sole­noid is energized, the guard can be
opened and the key is removed from
the switch, thereby

ing

the normally closed contacts.
This interrupts the control circuit,
stopping machine operation.

positively break-

June 2000

Heavy-Duty Safety Interlock Switches Provide High Level
Protection by Locking Guard Until Machine Stops and
It Is Safe to Enter

Ratings and Approvals

■

UL Listed
CSA Certified

■

■

TUV
IEC 947-5-1

■

■

EN60947-5-1
NEMA A300 (UL/CSA Pilot Duty)

■

■

LED Indicating Units A150
Direct Opening N.C. contacts per

■

EN60947-5-1

For the most current information
on this product, visit our web site at:
www.sensingsolutions.com

Product Features

Three simultaneous mechanical actions occur when the key is inserted into

■

the operating head to make it difficult to defeat with common tools

■

Latching solenoid locks the actuating key in place and holds the guard
closed until the solenoid is energized — use with a timer or stop-motion
detector to allow time for machine rundown before the guard can be
opened

Manual override key provided to disengage solenoid for machine mainte-

■

nance or emergency access
Rugged cast aluminum body stands up to harsh industrial environments

■

Three actuating key styles for mounting flexibility, including a self-aligning

■

version

■

Choose from 1N.O.-1N.C. or 2N.C. DPDB contacts
Operating head and switch body interlock for strength and a sure fit

■

Four unique head mounting positions

■

1/2 – 14 NPT conduit entrance or pin connector versions

■

All models meet UL, CSA, European and International requirements

■

For Customer Service in the U.S. call 1-800-356-1243,

in Canada call 1-800-268-3578.

For Application Assistance in the U.S. and Canada

call 1-800-426-9184.

PG.05F.03.T.E

Safety Products

June 2000

Model Selection — Solenoid Latching Key Interlock Switches (Power to Release)

a

Circuit

1N.O.-1N.C.
DPDB
slow action

1N.O.-1N.C.
DPDB
slow action
with LED
indicating lights

Orange:
Guard
Unlocked

Green:
Guard
Closed

2N.C.
DPDB
slow action

Contacts Contact Operation Solenoid

32

31

E1E2 31 12 23 24

Solenoid

Voltage

E1
(+)

31

E1 E2 31 12 23 24

Solenoid

Voltage

E1
(+)

31

Load1Load

E2
(–)

32

Load1Load

E2
(–)

32

11 12

23 24

31

23

SwitchSolenoid

11 12

23 24

GreenOrange

31

23

SwitchSolenoid

11 12
21 22

GND

2

GND

2

Key Interlock Switches — NEMA Solenoid Models

Closed Open

Key

in

Switch

Key

in

Switch

Solenoid Off

Solenoid On

Key

Fully

out of

Switch

Key

Fully

out of

Switch

31-12
23-24

12

24

31-12
23-24

12

24

Voltage

110V AC

230V AC

110V AC

24V DC

24V DC

24V DC

Catalog Number

1/2 – 14 NPT
Conduit Entrance

5-Pin Mini-Connector with
3-Pin Mini-Connector for

b

Solenoid

E48M3K3F24 E48M3K3F24P7

E48M3K3F110 E48M3K3F110P7

E48M3K3F230 E48M3K3F230P7

E48M3KL3F24 E48M3KL3F24P7

E48M3KL3F110 E48M3KL3F110P7

E48M3K4F24 E48M3K4F24P7

2

Key

in

Switch

Key

in

Switch

Solenoid Off

Solenoid On

Key

Fully

out of

Switch

Key

Fully

out of

Switch

31-12

E1 E2 31 12 21 22

2N.C.
DPDB
slow action
with LED

E1
(+)

Solenoid

31

Voltage

Load1Load

E2
(–)

32

11 12
21 22

indicating lights

Orange:
Guard
Unlocked

E1 E2 3112 21 22

Solenoid

Load1Load

Voltage

Green:
Guard
Closed

a

N.O. and N.C. contacts are defined with the key fully engaged in the switch.

b

Face view male shown. For connector cables suitable for use with these switches, see PG.05.05.T.E .

E1
(+)

E2
(–)

GND

2

31

21

GreenOrange

31

21

12

22

SwitchSolenoid

GND

2

12

22

SwitchSolenoid

21-22

31-12
21-22

110V AC

230V AC

24V DC

110V AC

E48M3K4F110 E48M3K4F110P7

E48M3K4F230 E48M3K4F230P7

E48M3KL4F24 E48M3KL4F24P7

E48M3KL4F110 E48M3KL4F110P7

PG.05F.03.T.E