Safety Switching Devices - RS Components …docs-europe.electrocomponents.com/webdocs/0665/0900766b...Safe Savings Wieland safety switching devices economize on everything: procurement

Progress in Safety

Safety Switching Devices

152.1 C 11/04

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Seri

es

Safety for Man and Machine

Today, the abundant functions offered by our range cover all the routine industrial applications

As well as their diversity of applications, Wieland safety switching devices possess other convincing advantages too:

The current 4000 series safety switching devices meet all the modern safety requirements and provide top technology at an economical price. Of course they meet all the safety requirements up to safety category 4 acc. to EN 954-1, as well as satisfying the EN 60204-1 directive and possessing approvals from BG (Berufsgenossenschaft), UL (Underwriters Listing Laboratories) and CSA (Canadian Standards Association).

• Safety door applications• Emergency stop functions• Switching edges, bumpers and

switching mats• Two-hand applications

• Valve position monitoring• Delayed interlock deactivation• Safe stoppage of movements• Light barrier applications

• Multifunctionality in the smallest of spaces

• Connection of all sorts of sensors, such as limit switches, electro-magnetic switches, emergency stop buttons, inductive sensors, light grilles with semiconductor outputs, etc.

• OSSD-compatible, so unaffected by test signals from connected sensors

• Supply voltage up to AC 230 V for worldwide compatibility

Safety and efficiency have always been of exceptional importance for Wieland, the connection pioneer for industrial automation and building installation. Schleicher Electronic – the Wieland electronics competence centre in Berlin – develops high-quality switching devices in 22.5 mm housings, uniting superb performance with low space requirement.

Safe SavingsWieland safety switching devices economize on everything: procurement costs, running costs, future disposal costs, time for install-ing and removing, space in the enclosure, resources during manufacturing. But not on safety.

Thanks to their sturdy design and robust electronics, Wieland safety switching devi-ces cope with industrial environments from

–25 °C to +55 °C. High EMC compatibility ensures safety function availability even under difficult electromagnetic conditions, for instance close to converters or radio transmitters. The uniform module width of 22.5 mm saves space and simplifies ex-change. Also, no tools are needed to attach modules to the DIN rail or remove them again. Versions with plug-in terminals save even more time during installation.

Safety Switching Devices 2 | 3

Developing the narrow housing has allowed us to increase environmental compatibility – in the manufacturing process and there-after. The ecological perspective takes in the whole life cycle of the safety switching devices, from resource-effective production using environmentally friendly materials right through to recycling-oriented design and unproblematic disposal.

• Cadmium-free relay contacts• Recyclable, halogen-free polycarbonate

housings and terminal carriers• Lettering by laser rather than

solvent-based printing• Electronics and plastic parts can be

sorted during disposal process without attached identifying labels

High-tech Ecological

SNO 4062K• Stop category 0, application

up to safety category 4• One- or two-channel activation• Cross monitoring• Reset button monitoring (RBM)• Start function with RBM:

manual start (reset button) Start function without RBM: automatic start (bridge) or manual start (reset button)

• Optional synchro-check of limit switches ≤ 0.5 s

• 2 enabling current paths (NO)• 1 signalling current path (NC)• OSSD-compatible

(see page 10)

Emergency Stop Relays

The SNO relays are basic devices for one- or two-channel activation of emergency stop and safety door applications. They are used to protect persons and machines by directly disconnecting the power supply.


up to safety category 2• Single-channel activation• Start functions:

automatic start (bridge) or manual start (reset button)

• Reset button monitoring• 3 enabling current paths (NO)• 1 signalling current path (NC)

SNO 4062KMAs SNO 4062K, but additionally:• Four-wire monitoring of

switching mats, strips and edges

• Input debouncing – very suitable for fast tactile applications, e.g. with light grilles and switching mats


up to safety category 4• One- or two-channel activation• Cross monitoring• Reset button monitoring (RBM)• Start function with RBM:

manual start (reset button) Start function without RBM: automatic start (bridge) or manual start (reset button)


• 3 enabling current paths (NO)• Also 12 V DC for applications

in the construction machinery sector

• OSSD-compatible (see page 10)

SNO 4063KMAs SNO 4063K, but additionally:• Four-wire monitoring of

switching mats, strips and edges

• Input debouncing – very suitable for fast tactile applications, e.g. with light grilles and switching mats

SNO 4063KR As SNO 4063K, with supply voltage reset (see above)

Supply voltage reset

Some systems with emergency stop monitor-ing, such as water treatment plant or compres-sor controls, can restart without danger after power failure. Nonetheless, DIN EN 60204-1 requires that restarting after emergency stop must be confirmed by actuating the reset button. This means that the safety switching device must not be configured for automatic start, because in that case both the starting lockout (start after supply voltage is switched on) and the restarting lockout (start after emergency stop button released or safety door closed) are disabled.

For this application we provide the SNO 4063K emergency stop relay and the SNT 4M63K safety door monitor in KR versions with a fixed supply voltage reset function. Even when configured for manual start, these devices start automatically when power is switched on, as long as the sensors signal „status good“. After power failure and when power is switched off and on again, the machine starts up without the reset button being actuated. But after the emergency stop button has been released the reset button must be actuated before the machine will start.

4 | 5

...starting lockout is...restarting lockout is

SNx xxxxKRwithout supply voltage reset

When configured to

SNx xxxxK without supply voltage reset

When configured to

manual automatic start... start... off off on off

manual automatic start... start... on off on off


Delayed and Undelayed Enabler Combinations

SNV 4063KL• Stop category 0/1, application

up to safety category 4/3 (undelayed/delay-release enabling current paths)

• One- or two-channel activation through contacts or semicon-ductors

• Cross monitoring• Reset button monitoring (RBM)• Start functions with RBM:

manual start (reset button) Start functions without RBM: Automatic start (bridge)


• 3 enabling current paths (NO, 2 undelayed, 1 delay-release)

• Release delay can be set steplessly from 0.15 to 3 s or 1.5 to 30 s (depending on device type)


When emergency stop occurs the SNV 4063 KL allows controlled stopping of a drive through the delay-release enabling current path. After stopping the machine part is released safely.

The operate-delay enabling current path of the SNV 4063 KP allows con-trolled delayed interlock deactivation on a safety device. This means you can do without halt detection with additional sensors and evaluation units.

SNV 4063KP• Stop category 0, applica-

tion up to safety category 4/3 (undelayed/operate-delay enabling current paths)

• One- or two-channel activa-tion through contacts or semiconductors

• Cross monitoring

• Reset button monitoring (RBM)

• Start functions with RBM: manual start (reset button) Start functions without RBM: Automatic start (bridge)


• 3 enabling current paths (NO, 2 undelayed, 1 operate-delay)

• Operate delay can be set steplessly from 0.15 to 3 s or 1.5 to 30 s (depending on device type).



The safety switching devices in the 4000 series are available with fixed screw connections or four detachable plug-in terminals with screws for fast installation and removal. Coding pre-vents the slots being confused. The terminals accept conductor sizes from 0.14 to 2.5 mm2.

The SNT 4M63K is a basic device for monitoring separating safety devices and danger zones. This multifunctional relay can also be used for emergency stop applications up to category 4 and for valve monitoring.

SNT 4M63K• Stop category 0, application up

to safety category 4• Two-channel activation through

2 NOs or 1 NO / 1 NC as contacts or semiconductors

• Cross monitoring• Optional synchro-check of limit

switches ≤ 0.5 s• Reset button monitoring (RBM)

• Start functions with RBM: manual start (reset button) Start functions without RBM: Automatic start (bridge) or manual start (reset button)

• 3 enabling current paths (NO)• OSSD-compatible (see page 10)

SNT 4M63KRAs SNT 4M63K, with supply voltage reset (see page 5)

Safety Door Monitors


The SNZ 4052K basic device protects the operator by monitoring synchro-nous operation of two-hand buttons or safety door circuits, e.g. on presses, cutting and bending machines, machining centres, etc.

SNZ 4052K• Stop category 0, application up

to safety category 4, require-ments Type III C to EN 574

• Two-channel activation through 1 NC and 1 NO

• Cross monitoring• Synchro-check of limit

switches ≤ 0.5 s• 2 enabling current paths (NO)• 1 signalling current path (NC)

Two-Hand Relays

The SNL 4062K light barrier evaluator and tester monitors one-way and reflection light barriers for securing hazardous areas. It can monitor two dependent or independent single-channel input circuits, e.g. light barriers and emergency stop. Malfunctions in the safety system are detected by a startup test and cyclical dynamic tests. Several light barriers can easily be cascaded.

Light Barrier Evaluator

Non-contact safety devices and OSSDA non-contact safety device is a setup of de-vices and/or components that work together for safety shutdown and detection of presence. The non-contact safety device has at least a sensor function (e.g. safety light barrier or other secure sensors), a monitoring function (e.g. cyclical self-tests) and an output switch-ing element (OSSD).

As an output switching element, the OSSD (Output Signal Switching Device) is part of a non-contact safety device as per EN 61496-1. It switches to off state if the light barrier or monitoring sensors are activated during normal operation.

The OSSD-compatible safety switching devices from Wieland allow you to connect sensors with potential-carrying semiconductor outputs (24 V potential switching). Function is also ensured with modulated self-test signals or overcurrent limitation on the semiconductor (i.e. OSSD compatability e.g. with control via light grille outputs).

SNL 4062K• Stop category 0, application up to safety

category 3, BWS Type 2 to EN 61496-1• 2 input channels for activation through one-

or two-channel contacts or semiconductors• Cross monitoring• Reset button monitoring (RBM)• Start functions with RBM:

manual start (reset button) with restarting lockout Start functions without RBM: Automatic start (bridge) without starting lockout

• Operating modes: – Test pulse direction (positive/negative) – Restarting lockout (on/off) – Override (static/dynamic)

• 2 enabling current paths (NO)• 1 signalling current path (NC)• OSSD-compatible (see below)

10 | 11Safety Switching Devices

Expansion DevicesAll the basic devices in the 4000 series can be augmented with switching devices from the SNE series. The achieved stop and safety category is affected by the basic device used. The basic device and the SNE are coupled via the check-back path of the SNE.

SNE 4003K• One- or two-channel activation• Activation through semicon-

ductor outputs in voltage range 15 to 30 V DC

• Ideal as output expansion / augmentation, e.g. for light grilles with OSSD

• 3 enabling current paths (NO)• 2 signalling paths (NC)• OSSD-compatible

(see page 10)

SNE 4004K• One- or two-channel activation• 4 enabling current paths (NO)• 3 signalling paths (NC)

SNE 4004KVAs SNE 4004K, with release delay and time buffering• 3 signalling paths

(NC, delay-release)• Non-volatile release delay

depending on device type 0.5 s / 1 s / 2 s / 3 s

SNE 4008S• Single-channel activation• 8 enabling current paths (NO)• 3 signalling current paths (NC)• 1 check-back current path (NC)

Applications and Functions

4000 Series

12 | 13Safety Switching Devices

Applications include

Activation

Start

Reset button monitoring


Supply voltages

Requirement to EN 574

BWS Type to EN 61496-1

Safety category to EN 954-1 Application to Device

Enabling

Signalling

Technical DataSNO 4003K

Emergency stop, safety door

Single-channel, contacts

Manual / automatic

Yes

–

AC/DC 24 V AC 115-120 V AC 230 V

–

–

2 4

3 NO undelayed

1 NC undelayed

SNO 4063K

Emergency stop, safety door, light grille

Single-channel, two-channel, contacts or semiconductors

Manual / automatic

Yes

–

DC12V AC/DC 24 V AC 115-120 V AC 230 V

–

–

4 4

3 NO undelayed

–

SNO 4062KM

Emergency stop, safety door, switch-ing strips, light grille


Manual / automatic

Yes

–

AC/DC 24 V

–

–

4 4

2 NO undelayed

1 NC undelayed

SNO 4062K



Manual / automatic

Yes

–

AC/DC 24 V

–

–

4 4

2 NO undelayed

1 NC undelayed

Applications include

Activation

Start

Reset button monitoring


Supply voltages

Requirement to EN 574

BWS Type to EN 61496-1

Safety category to EN 954-1 Application to Device

Enabling

Signalling

SNE 4003K

Contact expansion


–

–

–

DC 24 V

–

–

–

3 NO undelayed

2 NC undelayed

SNE 4004K

Contact expansion

Single-channel, two-channel, contacts

–

–

–

AC/DC 24 V

–

–

–

4 NO undelayed

3 NC undelayed

SNE 4004KV

Contact expansion

Single-channel, two-channel, contacts

–

–

–

DC 24 V

–

–

–

4 NO delay-release

3 NC release delayed

SNE 4008S

Contact expansion

Single-channel, contacts

–

–

–

AC/DC 24 V

–

–

–

8 NO undelayed

4 NC undelayed

SNL 4062K

Light barriers


Manual / automatic

Yes

–

DC 24 V

–

2

3 3

2 NO undelayed

1 NC undelayed

SNO 4063KM

Emergency stop, safety door, switch-ing strips, light grille


Manual / automatic

Yes

–

DC12V AC/DC 24 V AC 115-120 V AC 230 V

–

–

4 4

3 NO undelayed

–

Rated switching voltage

Max. continuous current per current path

Max. total current

Conductor size with wire-end ferrule

Protection type housing / terminals

Ambient temperature

Dimensions (W x H x D in mm)

Approvals

General Technical DataAC/DC 230 V

6 A

12 A

up to 1 x 2.5 mm2, up to 2 x 0.5 mm2

IP 40 / IP 20

–25 to +55 °C

22,5 x 99 x 114 | SNE 4008S: 45 x 99 x 114

BG, CSA, UL

14 | 15

SNO 4063KR



Manual / automatic

Yes

Yes

DC12V AC/DC 24 V AC 115-120 V AC 230 V

–

–

4 4

3 NO undelayed

–

SNV 4063KL

Emergency stop, safety door, brakes, light grille


Manual / automatic

Yes

–

DC 24 V

–

–

4/31)

4/31)

2 NO undelayed, 1 NO delay-release

–

SNV 4063KP

Emergency stop, safety door, unlock-ing, light grille


Manual / automatic

Yes

–

DC 24 V

–

–

4/32) 4/32)

2 NO undelayed, 1 NO operate-delay

–

SNT 4M63K

Safety door, emergency stop

two-channel, contacts or semiconductors

Manual / automatic

Yes

–

AC/DC 24 V AC 115-120 V AC 230 V

–

–

4 4

3 NO undelayed

–

SNZ 4052K

Two-hand circuit, safety door

Two-channel, contacts

Automatic in operation

–

–

AC/DC 24 V AC 115-120 V AC 230 V

Typ III C

–

4 4

3 NO undelayed

1 NC undelayed

SNT 4M63KR

Safety door, emergency stop

two-channel, contacts or semiconductors

Manual / automatic

Yes

Yes

AC/DC 24 V AC 115-120 V AC 230 V

–

–

4 4

3 NO undelayed

–

1) undelayed/delay-release enabling current paths2) undelayed/operate-delay enabling current paths


Product Range

DIN rail terminals• with screw connection• with spring connection• with IDC connection

Terminal blocks for electrical installations• with screw connection• with spring connection

Lighting and appliance terminalsTerminal strips

PC board connectors• modular/pluggable• insulated headers• rising cage clamp/plug connectors• TOP connection• spring connection• electronics housings

Electronics components• relay modules• safety switching devices• solid-state modules• interface modules• function modules• power supplies• innovative housing• lightning and surge arresters• distributed peripheral devices

Distributed installation systems• energy bus• decentralised I/O’s• distributed motor control unit• decentralised switching• energy bus project design tool

Systems for electrical installation• mains connectors IP20/IP66/IP68• bus connectors• compact connectors• low voltage connectors• flexible flat cable systems• distribution systems• switching devices for EIB-KNX, LON, Ethernet, radio control

Industrial connectors• mini connectors• connectors for hazardous areas• modular connector system• high-current connectors• connectors with mixed component set• bushing for switchgear cabinets• EMC connectors

Head office:Wieland Electric GmbHBrennerstraße 10 – 14D-96052 Bamberg

Sales and Marketing Center:Wieland Electric GmbHBenzstraße 9D-96052 Bamberg

Phone +49 (951) 9324-0Fax +49 (951) 9324-198www.wieland-electric.comwww.gesis.cominfo@wieland-electric.com

Documents

Safety Switching Devices - RS Components …docs-europe.electrocomponents.com/webdocs/0665/0900766b...Safe Savings Wieland safety switching devices economize on everything: procurement