2EX1 datasheet(2/7 Pages) HONEYWELL

2 / 7 page

Limit and Enclosed Switches

EX Series

Explosion-Proof Switches

Honeywell Sensing and Control 1-800-537-6945 USA

1-815-235-6847 International 1-800-737-3360 Canada

A121

Single-Conduit

Connect Switch*

* See page A124 for double conduit connect switches.

EX switches feature the smallest UL-listed

housings available for use in hazardous lo-

cations. Flame paths within the housing

cool exploding gases below the kindling

temperature before they reach the explosive

gases surrounding the housing.

The enclosed switching unit, which is held in

place by screws, is accessible when the

cover plate is removed. A tapped conduit

opening is located in one end of one group

of EX listings (pages A122-A123); while a

second group (page A124) has a conduit

opening in each end of the switch.

These switches are not sealed against liq-

uids and are not intended to be subjected to

liquid splash or for outdoor applications. If a

sealed explosion-proof switch is required,

refer to the type CX and LSX.

ELECTRICAL RATINGS

Circuitry

Electrical Ratings

UL/CSA Rating:

15 amps, 125, 250 or 480 VAC;

⁄8 Hp, 125 VAC; 1⁄4 Hp, 250 VAC;

⁄2 amp, 125 VDC; 1⁄4 amp, 250 VDC.

Single-Pole

Double-Throw

UL/CSA Rating:

20 amps, 125, 250 or 480 VAC;

10 amps, 125 VAC ‘‘L’’;

1 Hp, 125 VAC; 2 Hp, 250 VAC;

Single-Pole

⁄2 amp, 125 VDC; 1⁄4 amp, 250 VDC.

Double-Throw

UL/CSA Rating:

10 amps, 125 or 250 VAC;

0.3 amp, 125 VDC; 0.15 amp, 250 VDC.

Double-Pole

Double-Throw

UL/CSA Rating:

10 amps, 125, 250 or 480 VAC;

⁄2 amp, 125 VDC; 1⁄4 amp, 250 VDC.

Single-Pole

Double-Throw

UL Rating:

1 amp, 125 VAC.

Single-Pole

Double-Throw

FEATURES

NEMA 1, 7 and 9

Compact, rugged housing

Up to 20 amp capacity

Ample wiring space

Mounts from 4 sides

Roller arms adjustable through 360°

Non-sparking actuators

Captive cover screws

UL Listed, file #E14274

CSA Certified, file #LR57324

Grounding screw

NEMA

NEMA standards: 1, 7 and 9.

UL listed and CSA certified: Class I, Div. 1,

Groups B, C and D (Group B - only as noted

in order guides); and Class II, Div. 1, Groups

E, F and G.

Also refer to NEMA application note in the

Reference Standards section at the rear of

this catalog.

TEMPERATURE RANGE

EX switches are for use in a temperature

range of –40 to 160°F (–40 to 71°C). For

applications outside these limits, please call

the 800 number.

ACTUATORS

Roller arm versions are designed for cam or

slide operation. Listings include clockwise

and counterclockwise actuation. Levers are

adjustable through 360°. The roller is non-

sparking material.

The cross-roller arm switch is for use where

the operating mechanism approaches from

a direction perpendicular to the longitudinal

axis of the switch.

The overtravel plunger has a case harden-

ed, radius tipped, push-rod plunger guided

by a sturdy bushing.

The manually operated switch has a large

paddle-shaped actuator.

REPLACEMENT PARTS

Available replacement parts are listed on

page A125. An installation sheet packed

with each switch describes these parts in

detail and explains how they are installed.

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