Cutler Hammer, Div of Eaton Corp E48M1K, E48KL0 Data Sheet

1-2

Product Selection

1

SAFETY

PRODUCTS

Key Interlock Switches
DIN Models

Page Page 1-4 Page 1-7

Safety Products

Overview

Applications

Safety device that is designed to be used with
movable guards or covers which must be
closed for operational safety. This switch
automatically stops the machine when the
guard is removed.

Any machine with movable guards installed to
protect machine operators from injury.

August 2007

Key Interlock Switches
NEMA Standard Models

Safety device that is designed to be used with
movable guards or covers which must be
closed for operational safety. This switch
automatically stops the machine when the
guard is removed.

Any machine with movable guards installed to
protect machine operators from injury.

Product
Features

Contact Ratings NEMA A600 (UL/CSA Pilot Duty) NEMA A600 (UL/CSA Pilot Duty)

Enclosure
Ratings

Construction

Approvals

Meet UL, European and International

■

requirements.

Actuating keys are designed to be

■

difficult to defeat, reducing the
possibility of tampering.

Removal of key positively breaks the N.C.

■

contacts — unit is designed to fail to safe
condition.

■

Cost-effective and durable plastic
construction.

■

Head can be rotated in any of four
positions.

■

Dual entry points for operation key — top
or side.

■

Conduit entry.

NEMA 4, IP65 NEMA 3, 4, 4X, 6P, 13, IP67

Synthetic Resin Aluminum Die Cast

UL Listed
TUV

Meet UL, CSA, European and

■

International requirements.

Actuating keys are designed to be

■

difficult to defeat, reducing the
possibility of tampering.

Removal of key positively breaks the N.C.

■

contacts — unit is designed to fail to safe
condition.

■

Rugged cast aluminum body for use in
harsh industrial environments.

■

Head can be rotated in any of four
positions.

■

Conduit entry.

UL Listed
CSA Certified
TUV

For more information visit: www.eaton.com

PG08301004E

S

Safety Products

August 2007

Technical Reference

Safety Interlock Switches

Often the need arises for a device
to provide a signal indicating that
a door has been closed or that a
machine guard is in place before
a machine can be turned on or a
sequence of operations can begin.

While a standard limit switch would
probably be able to do this function,
the possibility exists that the unit
could be false tripped or false actu­ated either accidently or deliberately,
thereby posing a danger to the per­son operating the machine.

In response to this problem, many
switch manufacturers offer what is
known as a key interlock switch.
These switches look and operate
similar to standard limit switches
except for the operating heads.
Instead of a rotary or plunger
operating head, there is a key slot.

In addition to being difficult to
override, the safety interlock is also
designed to fail to a safe mode. If, by
chance, the contacts were to become
welded together, removal of the key
will physically tear the contacts
apart, resulting in a safe condition.

Cutler-Hammer Key Interlock
Switches by Eaton’s electrical
business are available in both NEMA
and DIN style housings. NEMA Style
Key Interlock Switches feature
durable metal housings, which
removes power to the machine
when the guard is opened.

DIN Style Key Interlock Switches fea­ture a reduced size and economical
plastic housings. They remove
power to the machine when the
guard is opened.

Product information for these prod­ucts begins on

Page 1-4.

1-3

1

AFETY

PRODUCTS

Key Slot

Key

Actuation of the interlock switch
occurs only when the corresponding
key is inserted into the key slot. The
key is usually mounted on a door
or machine guard in such a way
that when the door or guard is
closed, the key fits into the slot
actuating the switch. The special
design of the key makes the safety
interlock switch extremely difficult to
defeat. When inserted into the slot,
the key performs three separate
mechanical functions.

PG08301004E For more information visit: www.eaton.com

1-4

1

SAFETY

PRODUCTS

Key Interlock Switches — DIN Models

PG.05F.02.T.E

Key Interlock Switches
DIN Models

Contents

Overview . . . . . . . . . . . . . . . . . . . . 1-4

Model Selection, Switches . . . . . . 1-5

Model Selection,

Actuating Keys. . . . . . . . . . . . . . . 1-5

Specifications. . . . . . . . . . . . . . . . . 1-5

Dimensions . . . . . . . . . . . . . . . . . . 1-6

The Cutler-Hammer
Safety Key Interlock Limit Switch
by Eaton’s electrical business 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. When the guard is opened,
the key is removed from the switch,
thereby
mally closed contacts. This inter­rupts the control circuit, stopping
machine operation.

positively breaking

Ratings and Approvals

■

UL Listed
TUV

■

IEC 947-5-1

■

■

EN60947-5-1
NEMA A600 (UL/CSA Pilot Duty)

■

■

Direct Opening N.C. contacts per
EN60947-5-1

Double insulation

■

®

E48 DIN-Style

Safety Products

the nor-

Cost-Effective Protection for Operators of
Moving Machinery

Self-Aligning Key
Accommodates
Small Guard
Swing Radius

Vertical and
Horizontal
Keys Provide
a Perfect Fit

1/2 – 14 NPT Conduit
Entrance (Bottom)

Compact
Switch Size

Actuating Key

May Be Inserted

into Top or

Side of Unit

Head Can Be

Rotated in 90˚

Increments

Hinged Cover

Provides Easy

Wiring Access

Product Features

■

Head mechanism is designed to be difficult to defeat with common tools
Three actuating key styles for mounting flexibility

■

■

Choose from 1N.O.-1N.C. or 2N.C. DPDB contacts
1/2 – 14 NPT conduit entrance

■

■

Four unique head mounting positions
Dual entry points for actuating key — top or side

■

Tough plastic construction

■

August 2007

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

For Customer Service in the U.S. call 1-877-ETN CARE (386-2273) ,

For more information visit: www.eaton.com

in Canada call 1-800-268-3578 .

For Application Assistance in the U.S. and Canada

call 1-800-426-9184 .

PG08301004E

S

Safety Products

August 2007

Key Interlock Switches — DIN Models

Model Selection — Key Interlock Switches

Circuit Contacts Contact Operation Catalog Number

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

2N.C.
DPDB
slow action

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

Stocked product, typical order quantities guaranteed in stock.

11

23

11

21

12

24

12

22

11-12
23-24

11-12
21-22

Key in

Switch

Key in

Switch

Model Selection — Actuating Keys (must be ordered separately)

Minimum Key Insertion Radius Catalog Number

Adjustable
(Self-Aligning)

7.8 inches (200 mm)

Closed Open

Key Fully out

of Switch

Key Fully out

of Switch

E48KL07

E48P4K1

E48P4K0

1-5

1

AFETY

PRODUCTS

Vertical

Horizontal

Stocked product, typical order quantities guaranteed in stock.

7.8 inches (200 mm)

7.8 inches (200 mm)

E48KL08

E48KL09

Specifications

Description Specification

Ambient Temperature Operation and Storage: -22° to 158°F (-30° to 70°C) minimum temperature is based

Enclosure Ratings NEMA 4, IP65 conforming to IEC 529. Care must be taken that contaminants do not

Ambient Humidity 95% maximum, non-condensing
Weight 76 grams (0.17 lb)
Housing Material Synthetic resin
Vibration Resistance 10G in both vertical and horizontal axis (from 10 to 500 Hz) conforming to IEC 68-2-27
Shock Resistance 30G in both vertical and horizontal axis conforming to IEC 68-2-27
Mechanical Life 1 million operations minimum
Electrical Life 150,000 operations minimum
Short Circuit Protection
Rated Insulation Voltage 400V (EN 60947-5-1)
Electric Shock Protection Insulation Class II (IEC 536)
Operating Force (extraction) 14.7 N (3.30 lbƒ)
Release Force (insertion) 29.4 N (6.60 lbƒ)
Total Travel 1.10 inch minimum (28 mm)
Pretravel 0.24 ± 0.10 inches minimum (6 ± 3 mm)
Direct Opening Force 58.8 N (13.2 lbƒ) minimum
Operating Speed 0.04 to 20 inches/second (1 to 500 mm/second)
Operating Frequency 30 operations/minute maximum

Rated
Voltage

120V AC
240V AC
480V AC
600V AC

upon absence of freezing water or moisture

enter the actuating key area as this may prevent the switch from performing to
specifications

Recommended: 10A fuse (type gl or gG) (IEC 269)

Current Maximum VA

Thermal Continuous Make Break Make Break

10A
10A
10A
10A

60A
30A
15A
12A

6.0A

3.0A

1.5A

1.2A

7200 VA
7200 VA
7200 VA
7200 VA

720 VA
720 VA
720 VA
720 VA

PG08301004E For more information visit: www.eaton.com

Operating Head Can
Be Rotated in Any of
Four Positions

Choose Mini

Connector

or 1/2 - 14

NPT Conduit

Entrance

Head and

Body Notch

Interlock

for Strength

Vertical and
Horizontal
Keys Provide
a Perfect Fit

Self-Aligning Key
Accommodates
Small Guard
Swing Radius

Rugged

Cast Aluminum

Construction

August 2007

Key Interlock Switches
NEMA Standard Models

Contents

Overview . . . . . . . . . . . . . . . . . . . 1-7

Model Selection, Switches. . . . . . 1-8

Model Selection,

Actuating Keys . . . . . . . . . . . . . . . . 1-8

Specifications. . . . . . . . . . . . . . . . 1-9

Dimensions . . . . . . . . . . . . . . . . 1-10

The Cutler-Hammer
Interlock Limit Switch by Eaton’s
electrical business 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. When the
guard is opened, the key is removed
from the switch, thereby

breaking

tacts. This interrupts the control
circuit, stopping machine operation.

the normally closed con-

®

E48 Safety Key

positively

Ratings and Approvals

UL Listed

■

CSA Certified

■

TUV

■

IEC 947-5-1

■

EN60947-5-1

■

NEMA A600 (UL/CSA Pilot Duty)

■

Direct Opening N.C. contacts per

■

EN60947-5-1

Safety Products
Key Interlock Switches — NEMA Standard Models

PG.05F.04.T.E

Heavy-Duty Safety Interlock Switch
for Reliable Machine Operator Protection

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

■

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
All models meet UL, CSA, European and International requirements

■

1-7

1

SAFETY

PRODUCTS

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

PG08301004E For more information visit: www.eaton.com

For Customer Service in the U.S. call 1-877-ETN CARE (386-2273) ,

in Canada call 1-800-268-3578 .

For Application Assistance in the U.S. and Canada

call 1-800-426-9184 .

1-8

1

SAFETY

PRODUCTS

Key Interlock Switches — NEMA Standard Models

Model Selection — Key Interlock Switches



Circuit

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

2N.C.
DPDB
slow action



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

Stocked product, typical order quantities guaranteed in stock.

Model Selection — Actuating Keys (must be ordered separately)

Horizontal 47 inches (1200 mm)

Contacts Contact Operation Wiring Type

11

23

11

21

12

24

12

22

Minimum Key Insertion Radius Catalog Number

Safety Products

11-12
23-24

11-12
21-22

Key in

Switch

Key in

Switch

Closed Open

Key Fully out

of Switch

Key Fully out

of Switch

E48KL01

(Connectors
Only)

Normal

Normal

August 2007

Catalog Number

1/2 – 14 NPT Conduit
Entrance

E48M1K1

E48M1K0

Vertical 47 inches (1200 mm)

Adjustable 5.9 inches (150 mm)

Stocked product, typical order quantities guaranteed in stock.

E48KL02

E48KL03

For more information visit: www.eaton.com

PG08301004E

Safety Products
Key Interlock Switches — NEMA Standard Models

August 2007

Specifications

Description Specification

Ambient Temperature Operation: -40˚ to 176˚F (-40˚ to 80˚C) minimum temperature is based upon

Enclosure Ratings NEMA Type 3, 4, 4X, 6P, 13. IP67 conforming to IEC 529

Ambient Humidity 95% maximum, non-condensing
Housing Material Die-cast aluminum
Vibration Resistance 10G in both vertical and horizontal axis (from 10 to 500 Hz) conforming to

Shock Resistance 30G in both vertical and horizontal axis conforming to IEC 68-2-27
Mechanical Life 1 million operations minimum
Electrical Life 500,000 operations minimum (10A, 250V AC resistive load)
Short Circuit Protection Recommended: 10A fuse (type gl) (IEC 269)
Rated Insulation Voltage 600V AC (IEC 946-5-1)
Electric Shock Protection Insulation Class I (IEC 536)
Operating Force (extraction) 4.4 ft-lb minimum (19.6 N)
Release Force (insertion) 4.41 ft-lb minimum (19.6 N)
Total Travel 0.91 inch minimum (23 mm)
Pretravel 0.39 ± 0.20 inches minimum (10 ± 5 mm)
Direct Opening Force 4.41 ft-lb minimum for safe operation (19.6 N)
Operating Speed 0.1 mm/s to 0.5 m/s
Operating Frequency 30 operations/minute maximum

Rated
Voltage

120V AC 10A 60A 6.0A 7200 VA 720 VA
240V AC 10A 30A 3.0A 7200 VA 720 VA
480V AC 10A 15A 1.5A 7200 VA 720 VA
600V AC 10A 12A 1.2A 7200 VA 720 VA

Current Maximum VA

Thermal Continuous Make Break Make Break

absence of freezing water or moisture

NOTE: Care must be taken that contaminants do not enter the actuating key area
as this may prevent the switch from performing to specifications.

IEC 68-2-27

1-9

1

SAFETY

PRODUCTS

PG08301004E For more information visit: www.eaton.com