I88-U1Z HW BERNSTEIN WERKZEUGFABRIK, I88-U1Z HW Datasheet

I88-U1Z HW

Manufacturer Part Number

I88-U1Z HW

Description

LIMIT SWITCH, LEVER

Manufacturer

BERNSTEIN WERKZEUGFABRIK

Datasheet

1.I88-A2Z_W.pdf (11 pages)

Specifications of I88-U1Z HW

Actuator Style

Roller Plunger

Switch Operation

Slow Action

Contact Voltage Ac Max

240V

Contact Current Ac Max

Switch Terminals

Screw Clamp

Actuator Type

HW RO11

Approval Bodies

CSA, CCC

Rohs Compliant

Yes

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Common Features of Electromechanical Switches

Switching systems

Switching elements lie at the heart of all

electromechanical switching devices and

must correspond to the respective applica-

tion. Essentially there are two basic types

of switching system that differ in terms of

their mechanical design and consequently

their scope of application:

l Slow-action contacts

l Snap-action contacts

Slow-action contacts

l On actuation, the normally-closed and

l The approach speed controls the contact

l Large distance/actuating travel between

l The switching points are identical in

Fig. 1 shows the contact force during the

switching cycle of a slow-action contact.

Overlap

l The switching principle of slap-action

normally-open contact functions corres-

pond to the movement of the impact pin

opening (closing) time

normally-closed and normally-open con-

tact function

forward and reverse travel

contacts makes overlapping of the NC/

NO contact function possible. The term

overlap refers to the area, in which both

the normally-closed contact as well as

the normally-open contact are closed in

connection with a changeover switch

with delay.

Lag between NC and NO

contact function

Fig. 2 shows the contact force during the

switching cycle of a slow-action contact

with overlap.

Snap-action contact

l On actuation, the normally-closed con-

l In this configuration there is no overlap

l The changeover accuracy is not depen-

l Consistently effective suppression

l Reliable contact-making also for

l The snap mechanism triggers the

l Due to the force reversal in the mecha-

tact function is immediately followed by

the normally-open contact function

of the NC/NO contacts. The switch pro-

vides a distinct OR-function.

dent on the approach speed

of DC arc

extremely slow approach speeds

full opening width of the contact on

reaching the changeover point

nical system, a different switching point

occurs in forward and reverse travel.

The lag is referred to as hysteresis.

Lag between NC and NO

contact function

Fig. 3 shows the contact force during the

switching cycle of a snap-action contact.

Switching diagram

The switching diagram describes the

function of the switching device in detail.

It combines the mechanical input variables

that act on the contact system via the actu-

ator with the electrical output variables. The

user can deduct the following information

from the switching diagram:

l Mechanical input variables

l Electrical contact-making in forward

l Terminal designation

l Point at which positive opening

l Type of contact system

Slow-action contact

■ Contact closed

■

Changeover point in forward travel

Changeover point in reverse travel

(force, travel, torque, angle)

and reverse travel

is achieved

Contact open

1.8

12,5N

Lag

(hysteresis)

Snap-action contact

6.5Ncm

6Ncm

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I88-U1Z HW Summary of contents

Page 1

Common Features of Electromechanical Switches Switching systems Switching elements lie at the heart of all electromechanical switching devices and must correspond to the respective applica- tion. Essentially there are two basic types of switching system that differ in terms of ...

Page 2

Contact designation In accordance with DIN 50013 and DIN 50005 the terminal designations of the contact ele- ments are always make up of two digits. The contact rows are numbered consecuti- vely with the allocating digit (1st digit) in actuation ...

Page 3

... The type of actuator Type code of position and safety switches I88 A2Z 1) Switch group Switching system Ti2 l SU1 I88 l SA2 l Bi2 ENK l SE2 SN2 l ENM2 The letter Z suffix to the designation of the switching function denotes the mechanical positive opening action of the normally-closed contacts. In technical data sheets, the positive opening point is identified by the international symbol p ...

Page 4

Switching function example NC = Normally-closed contact NO = Normally-open contact U1Z Slow-action contact SA2Z Snap-action contact UV1Z Slow-action contact, with overlapping contacts, 1 NC, 1 ...

Page 5

Common Features of Electromechanical Switches p = Mechanical positive opening action The term positive opening action refers to contact separation as the direct result of defined movement of the switch actuator by means of non-sprung parts. All parts involved in ...

Page 6

... Insulation-Enclosed Limit Switches I88 Recommended use Thanks to its standard dimensions as well as its wide range of contacts and actuators, this switch can be used on safety facilities and for position monitoring in virtually any industrial application. Product advantages l Standard switch conforming to DIN EN 50047 l Standard actuator conforming to DIN EN 50047, Type ...

Page 7

... Both with and without overlap RIWK (Form C) 10 (0.39") Ø10 3 (0.39") (0.13") Slow-action Snap-action 6086167018 6086117017 I88-SU1Z I88-U1Z RIWK RIWK 6086817087 I88-A2Z RIWK 6086817071 I88-E2 RIWK U Replacement actuator: 3918161672 Special features/variants (on request) l Available with black enclosure l With latching function l With steel roller and following ...

Page 8

... Available with black enclosure l With latching function l Available with different actuating directions l With steel roller KNW RO22 Slow-action Snap-action 0 mm 2,5 6186127112 6086177053 I88-U1Z KNW I88-SU1Z KNW 5,5 RO22 RO22 7,8 6186827246 I88-A2Z KNW RO22 U Replacement actuator: - Special features/variants (on request) ...

Page 9

... HW RO11 (Form E) 10 (0.39") Ø11 5.5 (0.43") (0.22") Slow-action Snap-action 6086121021 6086171022 I88-U1Z HW I88-SU1Z HW RO11 RO11 6086821099 I88-A2Z HW RO11 6086821068 I88-E2 HW RO11 6086321100 I88-UV1Z HW RO11 U Replacement actuator: 3918191547 Special features/variants (on request) l Available with black enclosure l With steel roller l Various roller diameters ...

Page 10

... Various roller diameters DGKW RO22 18-24 (0.71"-0.94") 10 (0.39" (0.83") (0.20") Slow-action Snap-action 6086127025 6086177026 I88-U1Z DGKW I88-SU1Z RO22 DGKW RO22 U Replacement actuator: 3918271528 Special features/variants (on request) l With latching function l Various roller diameters and with following contacts contact contact Both with overlap ...

Page 11

... Available with black enclosure l Various spring lengths l Different spring versions or spring rod KS Withdraw actuatorn Insert actuator Slow-action Snap-action Withdraw ac tuator 6116819140 I88-U1Z tuator U Replacement actuator: - Special features/variants (on request) W RAST Slow-action 6186103005 I88-U1Z W Latch RAST 6186803155 I88-A2Z W RAST Latch U Replacement actuator: - Special features/variants (on request) 37 ...

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