SIRIUS 3SE5 mechanical position switches

Our SIRIUS 3SE5 position switches are modern, compact and modular in design and simple to connect. They save time and increase flexibility during installation of a whole range of switch versions. In principle it is possible to combine any enclosure with any operating mechanism, paying due consideration to the EN 50041 and EN 50047 standards where necessary.

Complete units

Popular versions of the position switches in standard enclosures are available as complete units.

3SE5 position switches with plastic and metal enclosures

Modular system

The 3SE5 series is the modular system comprising different sizes of the basic switch and an actuator which must be ordered separately. Thanks to the modular design of the switch the user can select the right solution for his application from numerous versions and install it himself in a very short time.

Simple plug-in mounting enables fast replacement of the actuator heads.

Examples of selection options in the modular system

Service box for 3SE5 position switches

Service box with basic switches, actuator heads and accessories

For the SIRIUS 3SE5 position switches, a 3SX5110‑0BK service box can be ordered in the modular system for the most common applications for quick replacement as part of maintenance or for many first applications.

This contains a selection of basic switches, actuator heads and accessories for various possible combinations.

213 tested combinations of 22 individual products are possible. The standard interface enables simple replacement of the actuator heads by plug-in mounting. The actuator heads can be rotated in 16 increments of 22.5°.

For more information see Flyer.

Design

All enclosure versions have an integrated chlorinated rubber diaphragm for high functional safety in cold and aggressive environments.

Enclosure sizes

The 3SE5 switches are available in five different enclosure sizes with 2 or 3 contacts and with the XL enclosure:

• Open-type position switch IP20 or IP10
• Plastic enclosures according to EN 50047, 31 mm wide, IP65, 1 cable entry
• Metal enclosures according to EN 50047, 31 mm wide, IP66/IP67, 1 cable entry
• Plastic and metal enclosures according to EN 50041, 40 mm wide, IP66/IP67, 1 cable entry
• Plastic enclosures, 50 mm wide, IP66/IP67, 2 cable entries
• Metal enclosures, 56 mm wide, IP66/IP67, 3 cable entries
• XL metal enclosures with 4 to 6 contacts, 56 mm wide, IP66/IP67, 3 cable entries

Enclosure versions

Various basic switches can be selected for the enclosures of the 3SE5 series:

• With contact blocks with two or three contact elements (screw terminals) designed as slow-action or snap-action contacts; the slow-action contacts also with make-before-break
• Optional LED status display
• With assembled M12 device plug, 4- or 5-pole (available as an accessory for self-assembly for the wide enclosure)
• With 6-pole device plug + PE on the metal enclosures
• Versions with increased corrosion protection
• Versions for operating temperatures down to -40 °C
• AS‑Interface version with integrated ASIsafe electronics for all enclosure designs, see SIRIUS 3SF1 mechanical safety switches for AS‑Interface

Actuator versions

All operating mechanisms can be rotated around the axis in 16 increments of 22.5°. The following actuator versions are available:

• Plain, rounded and roller plungers
• Roller levers and angular roller levers
• Spring rods
• Twist levers and rod levers with twist actuator
• Fork levers with twist actuator

The actuator rollers are available with various materials and diameters.

Twist actuator for twist levers and rod levers, with setting of switching direction to right, left or right/left (standard for all twist actuators except fork levers)

Cover design

The mechanical position switches have a turquoise cover and the mechanical safety switches have a yellow cover.

Cover colors: position switches turquoise, safety switch yellow

On request the switches can be delivered ex works with a yellow cover. The cover has no effect on the mode of operation. Both versions can be used in Safety applications (see 3SE5, plastic enclosures, enclosure width 31 mm according to EN 50047).

Diverse contact types

Exchangeable 2-pole and 3-pole contact blocks for all enclosure sizes.

Contact block for position switches, 3 contacts

The 3-pole contact block with snap-action or slow-action contacts is regularly available for all enclosure forms. The same installation space is required as for a 2-pole block. The version with 1 NO + 2 NC offers, for example, more safety through redundant shutdowns (2 NC contacts) with simultaneous signaling (NO contact). The 3-pole blocks are also available with make-before-break and with 2 NO + 1 NC.

Contact reliability

The contact blocks ensure an extremely high contact reliability. This applies even when the devices are switching low voltages and currents.

Positive opening (→)

The NC contacts of the switch are opened reliably by means of a positively-driven actuating plunger mechanism. This is referred to as "positive opening".

Optional LED displays

LED displays are available for all enclosure sizes except for XL. The enclosures are supplied with an LED signaling indicator (1 x green + 1 x yellow). This is the first time that optical signaling equipment is also available for small standard enclosures according to EN 50047. The LEDs are implemented in 24 V DC and 230 V AC.

Mounting

Easy plug-in method for fast replacement of the actuator heads

Replacement of the position switch actuator head in only four steps

G_IC01_XX_00896 G_IC01_XX_00896

Video: What makes the SIRIUS position switches so flexible?

Quick-connect technology

For plastic enclosure with a width of 31 mm

Quick-connect technology for plastic enclosures

These position switches can be wired quickly and easily as an added customer benefit. The connecting cable is first connected to the terminals of the contact block and then guided through a slit into the cable gland opening. The time saved through this new connection method is approx. 20 to 25%.

A cable gland with seal must be used with the quick-connect method.

Video: How easy is it to install the 3SE5232 position switch?

Article number scheme

Note:

The article number scheme shows an overview of product versions for better understanding of the logic behind the article numbers.

For your orders, please use the article numbers quoted in the selection and ordering data.

The 3SE5 position switches differ from the previous series through the following new characteristics:

• The modular design of the product range allows a number of versions with a smaller number of bearing types for enclosures and operating mechanisms.
• All operating mechanisms can be rotated around the axis in increments of 22.5° (see Overview → Mounting).
• Rounded and roller plungers according to EN 50041 with 3 mm overtravel (total travel 9 mm) for greater tolerance when switching.
• All enclosure sizes – now also including the small enclosure 31-mm wide – are optionally available with an LED signaling indicator (see Overview → Optional LED indicators).
• All enclosure variants have an integrated chlorinated rubber diaphragm for high functional safety in cold and aggressive environments.
• All contact blocks are replaceable (see Accessories and spare parts).
• The 3-pole contact blocks are available for all enclosure sizes (see Overview → Diverse contact types).
• Elements with 1 NO + 2 NC slow-action contacts with make-before-break and 2 NO + 1 NC
• The short-stroke contact block 1 NO + 1 NC improves the precision of the switching operation through a reduced actuation path.
• The contact block with 1 NO + 1 NC snap-action contacts with a contact distance of 2 x 2 mm is suitable for simultaneous shutdown and signaling, particularly in the elevator industry.
• XL metal enclosures for accommodating two 2- or 3-pole contact blocks
• Versions with plugs for safe and fast connection, e.g. to fail-safe field modules of SIMATIC ET 200eco PN or SIMATIC ET 200AL
• The plastic enclosures with a width of 31 mm have simple and fast wiring equipment, making it possible to achieve time savings of approx. 20 to 25% when connecting (see Overview → Quick-connect technology).
• The ASIsafe electronics are integrated in the enclosure for the versions with AS‑Interface connection (see SIRIUS 3SF1 mechanical safety switches for AS-Interface); an additional adapter is not required.

With the standard position switches, mechanical positions of moving machine parts are converted into electrical signals. Through their modular and uniform design and large number of versions, the devices can comply with practically all requirements in industry.

Devices are available with enclosure versions to suit the particular ambient conditions. Different control tasks can be performed with the contact blocks best suited for the particular purpose. And many different actuator versions are available to match the mechanical configuration of the moving machine parts. Dimensions, fixing points and characteristics are largely according to the EN 50041 or EN 50047 standards.

The devices are suitable for use in any climate.

Standards

The switches comply with IEC 60947‑5‑1 (Electromechanical Control Circuit Devices).

The protective measure of "total insulation" by the plastic enclosure is ensured by the use of plastic screw glands.

Safety position switches

For controls according to IEC 60204-1, the devices can be used as a safety position switch. They comply with ISO 14119. A TÜV certificate is available. To secure position switches against changes in their position, positively driven techniques must be employed on installation.

Application examples

Example 1

Protective door monitoring up to SIL 3/PL e using two 3SE5 position switches with a 3RM1 fail-safe motor starter and a 3SK1 safety relay

For a detailed description, see https://support.industry.siemens.com/cs/ww/en/view/88822953.

Example 2

Protective door monitoring up to SIL 3/PL e with two 3SE5 position switches using a SIMATIC S7‑1500 fail-safe controller

For a detailed description, see https://support.industry.siemens.com/cs/ww/en/view/21331363.

Safety circuits

Standard IEC 60947‑5‑1 requires positive opening of the NC contacts. In other words, for the purposes of personal safety, the assured opening of NC contacts is expressly stipulated for the electrical equipment of machines in all safety circuits and marked in accordance with the standard IEC 60947‑5‑1 with the symbol (→).

SIL 1 according to IEC 62061/IEC 61508 or PL c according to ISO 13849‑1 can be attained with the 3SE5 position switches with (→) if the corresponding fail-safe evaluation units are selected and correctly installed (e.g. the 3SK safety relays or matching devices from the ASIsafe, SIMATIC or SINUMERIK product ranges).

If a second position switch with (→) is used, SIL 3/PL e can be attained.

In addition to positive opening, the actuators must also have a positively driven connection to the enclosure. The corresponding operating mechanisms are marked in the catalog with (→).

Evaluation of safety functions

Safety Evaluation in the TIA Selection Tool

The safety evaluation for the standards IEC 62061 and ISO 13849‑1 is performed quickly and easily, directly in the TIA Selection Tool. In addition to the fast and safe calculation of machine safety functions – from the definition of the system structure to the selection of components – this enables shared data management during all project phases. Take the next step in the digital design of machinery and equipment with Safety Evaluation in the TIA Selection Tool.

In addition, the functionalities of the proven Safety Evaluation Tool are still available. It determines the achieved safety integrity (SIL/PL) step-by-step. You receive the results as a standard-compliant report that can be integrated in the documentation as proof of safety.

For more information, see www.siemens.com/safety-evaluation-tool.

Contacts for every application

• Snap-action contacts: NC and NO contacts switch simultaneously – regardless of the actuating speed (v_min = 0.01 m/s) and contact erosion.
• Slow-action contacts: Difference in travel between "NC contact opens" and "NO contact closes"; the switching speed is the same as or proportional to the actuating speed (v_min = 0.4 m/s).
• Slow-action contacts with make-before-break: e.g. suitable for adding a second function to a sequence control.

Operating mechanisms for every application

Plain, rounded and roller plungers

• Operation in direction of the plunger axis or in case of roller plunger with bar at right angles to the plunger axis.
• The roller plunger is recommended for lateral actuation and relatively long overtravel.

Roller levers and angular roller levers

• For actuators made of finely ground steel in the form of cams, bars (approach angle 30°) or cam disks

Spring rods

• Can be used for undefined actuations and changing approach conditions
• Approach from any direction is possible

Twist levers and rod levers

• For high approach velocities (v = 1.5 m/s)
• Variety of approach options
• Insensitive to oil, grinding dust, dirt and coarse-grained material
• Adjustment of the lever in increments of 10°
• Can be adjusted with left or right switching

Fork levers

• Switchable in two directions
• Latching actuator
• For reciprocating movements

Safety functions

Machine safety/interlockings

Movable guards must be equipped with an interlocking or an interlocking with tumbler (guard locking device). These are two different functions in machine safety:

• The interlocking is a safety switch that shuts down the machine as soon as the protective cover to which it is attached is opened, making it a safety function.
• The tumbler (guard locking device) does not have to be a safety function. It holds the protective hood closed until the dangerous movement has come to a standstill. It can be mounted in addition to the interlocking.

Tumbler (guard locking device) types

• Tumbler (guard locking device) for process protection
  Process guard locking device, often implemented with a high locking force of the switch, protects automatic operation of the machine.
  In the event of a power failure, the process guard locking device opens.
• Tumbler (guard locking device) for personal protection
  A safety guard locking device can only be opened when the machine has come to a complete stop. In the event of a power failure, the safety guard locking device remains closed.

Monitoring with safe evaluation units from the 3SK series

Note:

Taking account of certain fault exclusions (e.g. actuator breakage), use of just one hinge switch or a switch with separate actuator with or without tumbler up to SIL 2/PL d is possible as described in the table.

Since the machine manufacturer must provide proof of fault exclusion, the component manufacturer is unable to carry out a definitive assessment of the measures taken.

For more information, see https://support.industry.siemens.com/cs/ww/en/view/35443942.

The maximum achievable SIL or PL always depends on other assumptions as well. Factors to be taken into account include the DC (declaration), the CCF, and the number of actuations.

More information

• Safety technology or safe evaluation units of the 3SK series, see Safety technology.
• Selection aid with 3SE6 non-contact safety switches and 3SE5 mechanical safety switches without and with tumbler, see Safety technology → Monitoring with safe evaluation units of the 3SK series.

Safety cabling in the field with IP67

Excerpt from the Safety field system composed of SIRIUS sensors and SIMATIC ET 200 with the M12 connection method

The new system comprising SIRIUS sensors and fail-safe SIMATIC ET 200 provides a safe M12 connection method for industry.

The SIRIUS sensors can be connected in the field via the fail-safe field modules of the SIMATIC ET 200eco PN and SIMATIC ET 200AL.

The signals are forwarded to the higher-level controller via PROFINET/PROFIsafe either by means of a direct connection of the SIMATIC ET 200eco PN or, in the case of SIMATIC ET 200AL, via an interface module.

For more information and examples, see SIRIUS 3SE mechanical safety switches and 3SU1 EMERGENCY STOP enclosures for PROFIsafe connection.

General data

1) For special versions, see technical product data sheet.

2) For slow-action contacts 1 NO + 2 NC with make-before-break ("M") and 2 NO + 1 NC ("P") the following applies: over 250 V AC.

3) For slow-action contacts 1 NO + 2 NC with make-before-break ("M") and 2 NO + 1 NC ("P") the following applies: over 250 V AC only equal potential.

4) Without any welds according to IEC 60947-5-1.

Enclosures

¹⁾ With the conductor connected and the clamping screw tightened.

Circuit diagrams

Enclosure widths 31, 40, 50 and 56 mm

XL enclosures, width 56 mm

3SE5 pin assignment

Legend:

gn = green, ye = yellow

✓ Connected

-- Not available

¹⁾ Version for ambient temperatures down to -40 °C.

Position and safety switches can be ordered as complete units and also as components of the modular system.

Using the modular system you can assemble switch variants which are not available as complete units. Each complete unit can also be supplied as a module.

A basic switch for the modular system comprises an enclosure with a contact block and a cover. Among the basic switches the following versions, for example, can be selected:

• Basic enclosure with rounded plunger
• Version with increased corrosion protection
• Version with M12 device plug and/or with 2 LEDs
• Version with M12 device plug or 6-pole + PE

Support function

The 3SE5/3SF1 position and safety switches can also be ordered using an online configurator.

This also enables a complete documentation to be prepared:

• Product data sheets
• Dimensional drawings
• Operating travel diagrams
• CAD data in 2D and 3D model images
• Ordering data
• Product photos

Online configurator, see www.siemens.com/sirius/configurators.

Complete units

Ordering example

Required:

• Position switch according to EN 50047 in a plastic enclosure
• Contact block with slow-action contacts 1 NO + 1 NC
• Angular roller lever, metal lever and plastic roller

To be ordered:

Modular system

Ordering example 1

Required:

• Position switch according to EN 50047 in a plastic enclosure
• Contact block with slow-action contacts 1 NO + 1 NC
• Angular roller lever, metal lever and plastic roller

To be ordered separately:

Ordering example 2

Required:

• Position switch according to EN 50047 in a plastic enclosure
• Contact block with slow-action contacts 1 NO + 1 NC
• Twist levers, high-grade steel lever and plastic roller

To be ordered separately: