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Command devices are of great importance for the man-machine interface in the area of industrial applications. For example, they are mounted in switch-boards, control panels, two-hand control panels, in lift manufacture and on materials-handling plants, including conveyors. Manual actuation of the devices starts operating sequences and functional processes or serves to bring these to an end.
Emergency Stop command devices are generally connected in the safety circuit of a machine or plant and are of particular importance in terms of the control system for these. In case of a fault or accident, the secure function and quick accessibllity of Emergency Stop command devices can be crucial for saving life, limiting the degree of injury to personnel or the extent of damage to a machine.
New requirements are placed on the mode of operation of these command devices by the new harmonised European Standard EN 418 regarding functional aspects and recommendations for the arrangement of Emergency Stop equipment.
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Safety switches ensure the obligatory isolation of electrical power under condition of equipment cleaning, maintenance and repair. Other methods of isolation, e.g. rmoval of fuses or disconnection of motors, which require qualified electricians are unnecessary.
3 and 6 pole switches 12 A / 16 A, 25 A, 40 A, 63 A / 80 A, 125 A / 160 A, 250 A, 315 A, 400 A, 500 A
Explosion protection to CENELEC, IEC
For use in Zone 1 and Zone 2, Zone 21 and Zone 22
Motor switching capacity AC 3 and AC 23 acc. to IEC 60 947-3, EN 60 947, DIN VDE 0660 part 107
With or without up stream contact
Definite opening for main contacts
Isolating switches acc. to DIN VDE 0660
Can be padlocked in "OFF" position
Non-reversible switch with defined switch position
High level of corrosion resistance in external components
Marked with signal orange label "Safety Switch"
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Eden is a new non-contact sensor using dynamic signal transmission. The sensor operates to category 4 according to EN 954-1 and has an extended sensing distance. Several Eden sensors and light beams can be connected in the same safety circuit and dynamically monitored by the Vital safety module.
We also offer several other types of interlocking devices. The Emergency Stop Grab Wire safety switch JSNY10 provides 'emergency shutdown' up to 25 metres.
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Non-contact safety switches provide considerable advantages where tough ambient conditions apply. They are also especially suitable for use on imprecisely controlled safety equipment. Non-contact EUCHNER safety switches operate on the basis of clearly coded actuators. Manipulation of an actuator is thus impossible. Supply voltage and data transfer to the coded actuator are realized by means of a non-contact inductive read head. A monitoring output is additionally available for the safety outputs. Through the redundant design of the evaluating device, the safety switch can be used for the highest safety requirements up to control category 4 according to EN 954-1.
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Z/T and E.95 range position switches are suitable for sliding and hinged safety guards, which need to be closed to ensure the necessary operational security.
In combination with AES and/or AZR range safety monitoring modules all position switches class 1 shown in this chapter achieve Control Category 3 or 4 to EN 954-1.
Further applications for positions switches class 1 are most varied positioning duties. The variety of requirements to be found in practice can be met in detail by means of a wide range of actuating elements.
Design and mode of operation:
On the position switches class 1 the guarding device and the positive break NC contact are positively linked.
Schmersal make both standard and AS-i Safety at Work position switches with safety function.
Click here to see the AS-i models
Or for the standard models click below
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Pull-wire emergency stop switches are mounted on machines and sections of plants which cannot be protected by guards. In contrast to mushroom head Emergency Stop push buttons, on pull-wire switches the Emergency Stop command can be initiated from any point on the wire.
In combination with one of the AES and AZR range safety monitoring modules, see chapter 10.3, ZS range pull-wire emergency stop switches can be used for Control Category 3 or 4 to EN 954-1.
Design and mode of operation:
All of the pull-wire emergency stop switches conform to European Standard EN 418. They have a positive linkage between the NC contacts and the wire rope. The pull-wire emergency stop switches are brought into the operational condition by pre-tensioning the wire, i.e. the NC contacts are then closed and the NO contacts open.
Schmersal make both standard and AS-i Safety at Work pull-wire emergency stop switches.
Click here to see the AS-i models
Or for the standard models click below
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Pizzato Elettrica has designed and patented new accessories to install the rope of safety switches faster and to obtain an aesthetically more pleasant system.
The new accessories, in comparison with the traditional fixing system through carpentry material, have the following advantages:
%u2022 The installation is faster because only one screw is used for the fastening of every rope extremity, and the parts are prepared to ease the installation. Some practical tests have pointed out that the installation time is halved, reason for which it is named FAST.
%u2022 The system is aesthetically pleasant, because thread parts (which sometimes tear operators%u2019 dresses) and the rope extremities, usually fixed by heat-shrinkable sheath or adhesive tape, have been hidden.
%u2022 The red plastic covers of the fixing parts have been developed also for the function of controlling the rope clamping. If the rope fastening screw is not fixed tightly enough, the cover cannot pass.
%u2022 The rope is fixed without folds, thus reducing the rope stabilisation time and the possible re-calibrations of the rope tightening.
Furthermore two sturdy pulleys has been introduced in applications where the rope is very long in order to support the rope length or to bend its route. They are designed to avoid any deformation and to allow the rope to remain in its seat also when it is energetically activated.
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Safety Switches with Solenoid Interlocking and Interlock Monitoring TZ
The TZ safety switch has a magnetic locking device with additional interlocking monitoring. Consequently, the position of the door and the magnets can be monitored by the higher-ranking control. TZ type safety switches are type 2 switches. They differ by the type of interlock, magnet operating voltage, actuating head, contact elements used as well as the type of connection.
Features
Mechanical unlocking mechanism from the front side
2 LEDs for function display
Optionally with emergency release
Connection by cable routing or plug connector
Max. 8 contact elements permit flexible wiring
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The EUCHNER safety engineering offers you a wide range of safety switches and accessories. Safety switches are safety devices which are used to monitor movable safety guards. The safety switches differ from the following categories:
- Safety Switches category 1 or 2
- Housing (anodized die-cast light alloy or glass fibre reinforced plastic housing)
- Safety switches with or without interlock
- Switches in which the magnetic tumblers are monitored or switches without monitoring of the tumblers
- Mechanical, non-contact or electronic safety switches
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These safety switches are suitable for hinged safety guards, which need to be closed to ensure the necessary operational security.
The variety of requirements to be found in practice can be met by means of the wide range of safety switches for hinged guards.
Depending on the particular version of the switches, small doors and service flaps as well as heavy hinged doors on engineering machines and plants can be protected in such a way as to provide for easy setting up and maintenance.
Design and mode of operation:
A general advantage of the safety switches shown here is the integral cam within the safety switch. The requirements of EN 1088, such as positive linkage between cam and actuator as well as protection against tampering are thus fulfilled.
This combination within the switch provides cost advantage for the user in avoiding the necessity of mounting a specially designed cam.
These safety switches are mounted with slow action.
Protection class of all the safety switches is IP 67
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Safety Switch STA
The robust metal safety switch STA is dimension-compatible with the proven EUCHNER safety switches TP and STP in plastic housings. Due to its die-cast aluminum housing and its high degree of protection IP 67, the switch can withstand even extreme ambient conditions. Like the switches TP and STP, the safety switch STA also offers a guard locking and a guard locking monitoring. A great variety of switching elements is available. The contacts can switch a minimum current of 1 mA. Therefore the safety switch STA is suitable for use in safe control systems.
Features
Robust design
3 cable entries
High degree of protection IP 67
LED upon request
AS-Interface version upon request
BG approval (pending)
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Application:
Safety switches with separate actuator are suitable for sliding, hinged and particularly removable safety guards, which need to be closed to ensure the necessary operational security. They are also suitable for fitting on profile sections and existing equipment.
In combination with safety control modules all safety switches with class 2 shown in this chapter achieve Control Category 3 or 4 to EN 954-1.
Design and mode of operation:
On the safety switches with class 2, the switching element is not physically connected to the actuator but functionally brought together or separated for switching. When the guarding device is opened, the actuator is separated from the base unit. In the process, NC contacts are positively opened and NO contacts closed.
Enclosure rating of all the safety switches is IP 67. The safety switches can be fitted in any desired mounting position.
Schmersal make both standard and AS-i Safety at Work safety switches with separate actuator.
Or for the standard models click below
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Honeywell MICRO SWITCH™ Safety Switches
Full-Scale Offering. Solid, Robust Industry Knowledge.
Whether you're an end-user or OEM, you face an ongoing challenge: to keep your machines and equipment operating safely and productively, while meeting all global workplace safety standards. When you need comprehensive solutions for machine safeguarding, Honeywell helps you meet the challenge with one of the industry's broadest switch portfolios.
Honeywell offers you choices to ensure that your needs are met in the safety arena. Designed with OEMs in mind, we offer safety switches in every size.
-Miniature switches – less than 50 mm [2 in] square – for smaller doors and openings
-Trapped key and solenoid key switches for large, heavy doors
-Cable pull switches for conveyor or perimeter guarding.
-Non-contacting switches for small door position detection
And, all our products are backed by the Honeywell brand, service, and global support.
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SOLENOID CONTROLLED INTERLOCK SWITCH with 1 to 6 key slots
Electromechanical rotating latch that permits the interlocking of the power circuit up to 22kW and 380V
Takes into account one supplementary condition (zero speed, timer, etc…)
It frees between 1 and 6 keys by voltage emission
The position of the contacts is associated with the motion and position of the main key
Key Logic:
• 1 key slot: Key liberation by voltage emission.
• Association (+) of keys by voltage emission
• Interchanging ( / ) of keys:
1 key free and various keys locked, by voltage emission
Positive Safety: Electromagnet retracts mechanically when re-
locking.
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The Idemag CPR Non Contact Interlock Switch range offers a compact slimline fitting and provides environmental protection up to 80°C. and is suitable for high pressure hosing (IP66/67).
The housing is finished and sealed with a fitted back plate for extra mechanical and environmental durability.
In addition to the high specification enclosure the switch offers a wide 14mm sensing distance, a high tolerance to misalignment and can be actuated rom either the side or front switch face.
They provide up to 2NC 1NO circuits and will connect to most popular Safety Monitoring relays to provide up to Cat. 4 EN 954-1.
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The Idemag WPR Non Contact Interlock Switch range offers a robust wide fitting and provides environmental protection up to 80C. They are suitable for high pressure hosing (IP66/67) and are resistant to many organic and non organic chemicals.
The housing is finished and sealed with a fitted back plate for extra mechanical and environmental durability.In addition to the high specification enclosure the switch offers a wide 14mm sensing distance, and a high tolerance to guard misalignment.They are designed to fit to medium to large guards.
They offer 2NC high power (up to 2A.) circuits and will connect to most popular Safety Monitoring relays to provide up to Cat. 4 EN 954-1. An auxiliary signalling contact is available. The high power components and de-rating with an internal fuse mean they may be suitable for use in lower risk applications (subject to a risk assessment for the application).
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SAFETY CODED MAGNETIC SENSOR, SR series
Pizzato Elettrica extends its range of safety magnetic sensors by introducing the SR A series which distinguishes itself from the SR B series in the reduced dimensions.
Both series are devices studied to monitor protections and guards that, when linked to a safety module, can create a system up to safety category 4, according to EN 954-1. These products are composed by a magnetic field monitoring sensor, which is connected to the machine structure; and by a coded magnetic actuator, which has to be connected to the mobile guards. The sensor is manufactured to be activated only by the correct coded actuator and not through a common magnet.
Pizzato Elettrica safety sensors distinguish themselves by following main features:
- Insensitivity to dirt as totally sealed, making them especially proper to be used in the food-industry sector.
- Wide actuation zone, characteristic appreciated in the use of inaccurate protections or for protections that can change their mechanical characteristics through the time.
- Centering mark on the housing as a reference for the operating distances
- Possibility of connection in series more sensors also with mechanical switches.
- Actuation from two different directions.
- Available with cable or M8 integrated connector.
- Actuators with operating distance of 5mm or 8 mm.
The new sensor series complete the wide range of products that Pizzato Elettrica can offer in the machine safety field. For further information visit the web-site www.pizzato.com
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NEWS 2009
SAFETY SWITCHES HINGE-SHAPED, PALLADIO LINE
Pizzato Elettrica widens the own range of products making a new series of safety switches hinge-shaped named Palladio, where thanks to an aimed planning and a punctual analysis of the market requirements, safety and style are melted in one single product. The switch is completely integrated in the mechanical hinge, to result practically invisible to an inexpert eye: this guarantees a higher safety.
The assembly without visible screws and the pleasant line, make the switch perfectly integrated also with guards of modern design machinery.
In order to complete the offer it's available also the new variant of the safety switches hinge-shaped, Palladio line, HP AB, whose main features are:
- Version suitable for the direct assembling of glass plates or polycarbonate plates. The wider arm support and the spaced fixing points make installation easier, avoiding the developing of cracks when the holes are too close to the protection rim
- Version with working angle different from 0°
- Metal housing, cable output from bottom, from top or from back
- 4 integrated cable types available
- Versions with M12 connector
- Adjustable operating point, which allows the setting possibility for large guards
- Protection degree IP67
- 9 contact blocks available
- Additional hinge available with purely mechanical functions
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Idecode - Compact Fitting - Plastic - Type SPC
Universal fitting - established 22mm fixing footprint suitable for most general applications. Withstands environments where high humidity or hose down is required. Durable polyester housing. Wide 14mm Sensing and high tolerance to misalignment. Up to EN 954-1 Cat.4 with safety relay. 2NC 1NO circuits. Quick connect versions.
Part No Type Cable Length Circuits
111001 Idecode SPC 2M 2NC
111002 Idecode SPC 5M 2NC
111003 Idecode SPC 10M 2NC
111004 Idecode SPC QC-M12 2NC
111005 Idecode SPC 2M 2NC 1NO
111006 Idecode SPC 5M 2NC 1NO
111007 Idecode SPC 10M 2NC 1NO
111008 Idecode SPC QC-M12 2NC 1NO
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Idemag - Magnetic Non Compact - Type MPR
Compact yet robust fitting suitable for all small guard applications. Can be mounted unobtrusively in channels or behind doors - left or right cable exit Hygienic screw cap covers ensure suitability for Food Processing washdown Cost effective interlock solution Wide sensing at 12mm and high tolerance to misalignment High current switching capability to 0.5A. 2NC 1NO circuits - up to EN 954-1 Cat.4 with Safety Relay
Part No Type Cable Length Circuits
114001 MPR Cable Right 2M 2NC
114002 MPR Cable Right 5M 2NC
114003 MPR Cable Right 10M 2NC
114004 MPR Cable Right QC-M12 2NC
114005 MPR Cable Right 2M 2NC 1NO
114006 MPR Cable Right 5M 2NC 1NO
114007 MPR Cable Right 10M 2NC 1NO
114008 MPR Cable Right QC-M12 2NC 1NO
114009 MPR Cable Left 2M 2NC
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The Hygiecode SMC Non Contact Interlock Switch range offers a compact yet robust 22mm fitting and provides environmental protection up to 105°C. and is suitable for high pressure hosing. The housing is finished and sealed with a stainless steel back plate for extra mechanical and environmental durability.
In addition to the high enclosure specification the switch offers a wide 14mm sensing distance, a high tolerance to misalignment, LED indication of switch status, 'anti-tamper' coded magnetic actuation, and 2NC 1NO switching circuits to cope with modern industrial control requirements.
They will connect to most popular Safety Monitoring relays to provide up to Cat. 4 EN 954-1 and SIL 3.
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GLH Rope Switch
Idem Guardian Line Safety Rope Switches are designed to be mounted on machines and sections of conveyors which cannot be protected by guards. In contrast to traditional mushroom-head emergency stop buttons, Safety Rope Switches can initiate an emergency command from any point along the installed rope length and provide robust Emergency Stop Rope Pull protection for exposed conveyors or machines.
On pulling the rope, the safety contacts are positively opened and the auxiliary contact are closed. The switches are mechanically latched and can then only be returned to the operational condition by pressing the blue reset button (as required by EN418). A bi-colour LED indicator is available to enable switch status to be viewed from a distance.
Satisfies EN 418 and IEC 947-5-1 IEC 947-5-5
Guardian Line GLH features:
Die Cast Yellow Painted enclosure
IP 67 for hosedown.
Contact blocks (4 pole) 3NC + 1NO or 4NC or 2NC + 2NO.
3 conduit entries M20 or ½" NPT
Protect hazards up to 250 m. long.
Reset by push button.
Rope tension indicators.
Optional Signalling lamp available Green / Flashing Red 24V dc.
Rope pulled and breakage detection.
E-Stop Mushroom type button fitted.
Explosion-proof version available
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GLS Rope Switch
Idem Guardian Line Safety Rope Switches are designed to be mounted on machines and sections of conveyors which cannot be protected by guards. In contrast to traditional mushroom-head emergency stop buttons, Safety Rope Switches can initiate an emergency command from any point along the installed rope length and provide robust Emergency Stop Rope Pull protection for exposed conveyors or machines.
On pulling the rope, the safety contacts are positively opened and the auxiliary contact are closed. The switches are mechanically latched and can then only be returned to the operational condition by pressing the blue reset button (as required by EN418). A bi-colour LED indicator is available to enable switch status to be viewed from a distance.
Satisfies EN 418 and IEC 947-5-1 IEC 947-5-5
Guardian Line GLS range features:
GLS-Standard version - Die Cast Yellow Painted enclosure up to 80m.
GLS-SS Stainless Steel 316 version - Food Industry Compatible up to 100m.
IP 67 for hosedown.
Contact blocks (4 pole) 3NC + 1NO or 4NC or 2NC + 2NO.
3 conduit entries M20 or ½" NPT
Protect hazards up to 80 m. long.
Reset by push button.
Rope tension indicators.
Optional Signalling lamp available Green / Flashing Red 24V dc.
Rope pulled and breakage detection.
E-Stop Mushroom type button fitted.
ATEX Explosion-proof versions available
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GLM Rope Switch
Idem Guardian Line Safety Rope Switches are designed to be mounted on machines and sections of conveyors which cannot be protected by guards. In contrast to traditional mushroom-head emergency stop buttons, Safety Rope Switches can initiate an emergency command from any point along the installed rope length and provide robust Emergency Stop Rope Pull protection for exposed conveyors or machines.
On pulling the rope, the safety contacts are positively opened and the auxiliary contact are closed. The switches are mechanically latched and can then only be returned to the operational condition by pressing the blue reset button (as required by EN418). A bi-colour LED indicator is available to enable switch status to be viewed from a distance.
Satisfies EN 418 and IEC 947-5-1 IEC 947-5-5
Guardian Line GLM features:
Die Cast Yellow Painted enclosure
IP 67 for hosedown.
Contact blocks (4 pole) 3NC + 1NO or 4NC or 2NC + 2NO.
3 conduit entries M20 or ½" NPT
Protect hazards up to 50 m. long.
Reset by push button.
Rope tension indicators.
Optional Signalling lamp available Green / Flashing Red 24V dc.
Rope pulled and breakage detection.
E-Stop Mushroom type button fitted.
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Safety Rope Pull switches
SR
Plastic housing Protection class IP67
Emergency stop switch gear
Integrated emergency stop push button
Quick mounting device for rope installation
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Hinge - Interlock Safety Switch - Type IDIS-2
Positive opening Safety contacts to IEC 947-5-1 Compact version - fits on 22mm hole centres EN 50047 body Universal Actuator for use with Left Hand, Right Hand and Swing doors Opening angle - 180 degrees Contact Operation at 5 degrees Rugged plastic body - Enclosure Protected to IP66/67 Robust Stainless Steel Actuator Conformance to EN 60947-5-1 EN 1088 Conduit entries: M20 ½" NPT or Quick connect
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• For hinged guards with a rotation angle range from 0° to 270°
• Switching point freely selectable within a range of 270°
• Simple re-adjustment using integrated fine adjustment system even after switch point set
• 2 forced disconnect safety contacts p and auxiliary contact signalling
• Integrated cable or M12 connector
• Axial or radial direction of connection
• Suitable for systems in control category 4 to EN 954-1 with redundancy
• Protection IP 67
• For an optimum guidance of cables, system design allows right and left end stop
• Elongated hole for attachment to profile or fabricated guard frames
• Interior assembly between profiles by complying with finger protection regulations
• Stainless Steel hinge for full load capability and high-quality plastic houses the switching system.
Flexible installation, flexible connection,
flexible adjustment: the new SHS3!
The technical data sheets for SHS3 can be downloaded from www.bernstein-ag.com under Download products.
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Idem has launched the Kobra KP Range of Universal Tongue Interlock switches to cope with the rigorous demands of the food, beverage and pharmaceutical environments.
The Kobra KP Tongue Interlock Switch has an established footprint suitable for most general applications. High specification materials means it is suitable for use in rigorous areas were high humidity or washdown is required e.g.Food Processing and Petro-Chemical Industries.
ATEX Explosion Proof versions are available.
The Rotatable Head means it can easily be fitted to the leading edge of Hinged, Sliding or Lift off Guard Doors, and the unique double seal gaskets ensure reliability sealing against moisture ingress. All external and intern al screw fittings are Stainless Steel. 3 or 4 pole contact blocks are available and can be upgraded or replaced without removing the switch from the application.
4 different actuators are available including Flexible versions to help with alignment.
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The company Pizzato Elettrica is suggesting to the market many new products in the safety field for the factory automation.
In particular, it has been recently introduced anew and innovative series of strong safety switches with separate actuator and solenoid for guards and entrance machinery monitoring.
These FG series switches have a shape suitable for the installation also on modular profiles (40x40 mm) and distinguish themselves for following features:
- High sturdiness guaranteed by the metal housing and the stainless steel actuator (holding force 2500 N)
- Contact blocks with 4 poles available in 12 different configurations.
- Possibility of operation state signalling through external LED.
- Rotating head in 90° steps, not detachable, with actuator entries both frontal and vertical for the maximum versatility in the installation
- Protection degree IP67
- Versions with rotating lock release device, with emergency release push button or with both devices.
The new switches series integrates the wide range of products that Pizzato Elettrica can offer to its customers, for complete solutions and without compromise to machinery safety problems.
For further information it’s possible to visit the web-site www.pizzato.com or ask for the new general catalogue 2007/2008.
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Omron STI safety interlock switches are available in a wide variety of models to satisfy most machine guarding applications. Models range from rope-operated emergency stop switches, non-contact magnetic and hinge-pin-operated interlocks, to solenoid-actuated guard-door locking switches that restrict access until safe conditions exist. All models conform to applicable U.S. safety standards and all carry the CE mark.
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