Siemens SIRIUS 3SE7141-1EG10 Manuale di istruzioni per l'uso - Pagina 2

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SIRIUS

Emergency cable-operated switch with integrated EMERGENCY STOP

Operating Instructions

Read and understand these instructions before installing, operating, or main-

taining the equipment.

DANGER

Hazardous voltage.

Will cause death or serious injury.

Disconnect power before working on equipment.

Reliable functioning of the equipment is only ensured with certified components.

Important notice

The products described herein are designed to be components of a customized

machinery safety-oriented control system. A complete safety-oriented system

may include safety sensors, evaluators, actuators and signaling components. It

is the responsibility of each company to conduct its own evaluation of the effec-

tiveness of the safety system by trained individuals. Siemens AG, its subsidia-

ries and affiliates (collectively "Siemens") are not in a position to evaluate all of

the characteristics of a given machine or product not designed by Siemens.

Siemens accepts no liability for any recommendation that may be implied or sta-

ted herein. The warranty contained in the contract of sale by Siemens is the sole

warranty of Siemens. Any statements contained herein do not create new war-

ranties or modify existing ones.

Application

Safety cable-operated switches are used in those positions where an EMER-

GENCY STOP command must be accessible from all points of a machine, sys-

tem or plant. An EMERGENCY STOP command is applied by pulling the pre-

stressed pull-cable or by pressing the EMERGENCY STOP button (push but-

ton).

Design/Operating principle

The 3SE7 141-1 EG 10 wire switches have 3 NC contacts and 1 NO contact.

With the pre-stressed wire rope the NC contacts (11-12 / 21-22 / 31-32) are

closed and the NO contact (43-44) is open. When the cable is pulled or the

EMERGENCY STOP button is pressed the NC contacts (e.g. 11-12 etc.) open,

the NC contact (e.g. 43-44) closes and all contacts are locked in their respective

states. The blue swivel lever is used to unlock the contacts.

Unlocking is only possible in the middle - pre-stressed - position.

Installation

During the installation (see figure II/III) the switch needs to be pre-stressed to

such an extent that the needle in the display window moves to the middle posi-

tion. The cable-operated switch must be installed in such a way that it can be

safely unlocked manually.

The red PVC sheathing must be removed from the wire rope in the terminal area

before the pull cable is attached. The wire rope must be installed in accordance

with the installation notes.

Since the thimbles deform when the cable is pulled the cable should be pulled

forcefully several times after installation. The cable then needs to be re-stressed

using a DUPLEX terminal, eyebolt or tightener.

Attention: Cable supports are necessary (after every 5 m) for cable lengths

greater than 10 m. With increasing cable lengths the ambient temperature range

is more and more restricted due to the thermal expansion of the cable (see

figure III/A).

Wiring and sealing

Adequate cable glands with the appropriate degree of protection must be used

for the cable entry. There are three M20X1.5 cable entries. The cover screws

must be loosened to open the cover.

After wiring it is essential to tidy up the inner part of the switch (e.g. all conduc-

tor cut-offs must be removed), since foreign objects can influence the switching

performance of the switch. After the wiring process has been completed, the

cover must be reattached by uniformly tightening the cover screws.

Order No.: 3ZX1012-0SE71-2AA1

Notice

The switch must only be operated by pulling the pull cable and not by levering

out the mechanical system or by pulling out the pulling device using tools.

The operator must convince himself/herself regularly of the safe functioning of

the EMRGENCY STOP device.

Technical data

Standards applied

IEC 60947-5-5 / EN 60947-5-5

Enclosure

GD-AL alloy, painted

Cover

Impact-resistant thermoplast

Degree of protection

IP67 acc. to IEC 60529 / EN 60529

Switching system

...-1 EG 10 = 3 NC contacts and 1 NO contact

Type of connection

Connection terminal for 2.5 mm

0.05 mm

Cable entry

3SE7 141-...= 3 x M20x1.5

Cable length

3SE7 141-... max. 75 m

(observe ambient temperature range)

Mech. service life

> 10

Permiss. operating temperature–25 °C .up to +70°C (observe cable length)

Permiss. electr. load

250 V AC AC15: 2 A / 250 V

Short-circuit strength

6 A gL/gG D fuse

Characteristics / Specifications

– Complies with EN 418 / IEC 60947-5-5

– 4 contacts

– Integrated EMERGENCY-STOP button (see figure I/A)

– Cable tension and cable-break monitoring

– Twisting of the cable eye not possible

– Cable length 75 m

– Position displayed via display window (see figure I/B)

– Unlocking lever and display of the switching state (see figure I/C)

– Outside sealing sleeve (see figure I/D)

Wiring diagram

Off

3 NC / 1 NO

Cable break

Inspection

window

3SE7141-1EG10

English

acc. to IEC 60947-5-5

max. und

min.

switching cycles

DC13: 0.25 A / 230 V

Pull cable

Locking

Middle position

Locking

Cable break

Middle position

Pull cable

Needle