Texcel has supplied BT Cellnet with a remote facilities alarm monitoring and management system
Using the latest Vision VE5000 remote data gathering units and the multi-user VSys management software BT Cellnet are able to receive alarms and remotely manage their base stations in real time. The vision systems are able to manage all the support services found at remote sites including DC power systems, Battery back-up, Air-conditioning, Entry control, Security, Generators and general digital, analogue and serial based alarms.
This article was originally published on Engineeringtalk on 8 March 2001 at 8.00am (UK)
Related stories
Texcel aims for ISO13485 compliance
Texcel Technology has enlisted the services of quality consultant Quamshare to help it meet the requirements of the new European Medical Devices Quality Management System Directive ISO13485:2003
Quality system meets the grade
Texcel Technology operates a quality management system that complies with the requirements of BS EN ISO9001:2000
The Vision range of remote monitoring and management systems includes a number of remote access methods including PSTN, GSM, X25, ISDN and IP.
The site condition is presented as a graphical real time picture via the VSys management software which can have multiple clients.
The Vision solution is sized from single site applications to in excess of 10,000 remote sites.
* Texcel Technology has also received additional orders from their new distributor Newtech in Hong Kong.
The initial installation of Vision remote monitoring systems was completed last year for I-Link the international internet provider for their new network services building.
Following the success of that installation orders have been received from Newtech for VE5000 remote monitoring units and BCM100 battery condition monitors.
The application is the battery cell monitoring of UPS units installed in remote areas.
The BCM100 units will monitor a number of series connected batteries generating upto 500 volts DC and report via the VE5000 any cell failures back to VSys the network management system.
Newtech are expecting substantial savings in the on-going support costs for these UPS units now that repeated on site battery testing is no longer required.
Wednesday, September 12, 2007
Barksdale Control Products opens new office
Barksdale Control Products, the German and US based manufacturer of pressure, level, flow and temperature sensors, has set up a new wholly owned operating division in the UK
Barksdale Control Products, the German and US based manufacturer of pressure, level, flow and temperature sensors, has set up a new wholly owned operating division in the UK and opened its first UK office, in Basingstoke. To date, the company's products have been available in the UK only through distributors and, although distribution will still form an important route to market, Barksdale Control Products will also be targeting OEM accounts directly.
This article was originally published on Engineeringtalk on 9 March 2001 at 8.00am (UK)
Related stories
Barksdale starts 2002 with new office move
Barksdale Control Products, Europe's leading manufacturer of pressure, level, flow and temperature sensors, has moved to new premises at the Viewpoint business centre located in Basingstoke, Hampshire
Liquid level monitor takes temperature too
Compact top mounting level and temperature switch can provide two level switch contacts for 'low' level and 'low low' level indication
As the company's new Sales Manager for the UK and Ireland, David Thomas, explains, 'Traditionally, Barksdale has been known for its mechanical flow, level, temperature and pressure sensors and, although we are continuing to manufacture and develop these products, we are also introducing a new generation of electronic instruments.
These are extremely advanced, offering end users considerable benefits in terms of functionality, performance and reliability, making them equally suitable for both high volume and specialised applications.
We will therefore be working with our distributors and OEM customers to help them maximise the opportunities from this new technology'.
Further reading
Switches take control of fluid flows
Robust and dirt resistant flow switches are designed for measuring and controlling liquid media
Magnetic switch is versatile at level control
The new UNS-RG40 level switch is designed for versatile applications in shipbuilding and plant engineering
The first of this new generation of products is the microprocessor controlled UDS7 pressure switch, which is an extremely reliable, stable instrument, with an operating life at least ten times greater than a traditional mechanical device.
The new switch features an alphanumeric dot matrix display, tactile membrane keys for data input, plus LEDs to show set points and alarms, and is ideal for a wide range of applications, including all hydraulic equipment, injection moulding machines, engine test units and process lines.
Outputs can be analogue or digital, with RS232 connections enabling each unit to be connected directly to higher level monitoring and control systems.
David Thomas believes that the UK market offers considerable opportunity for Barksdale Control Products.
'We have already started recruited a number of key distributors of which included Hawco and ACAL and have identified a number of potential high volume applications in both traditional manufacturing and process sectors, where our new products and technology can play an important role in improving the performance of production, measurement and monitoring systems'.
Barksdale Control Products, the German and US based manufacturer of pressure, level, flow and temperature sensors, has set up a new wholly owned operating division in the UK and opened its first UK office, in Basingstoke. To date, the company's products have been available in the UK only through distributors and, although distribution will still form an important route to market, Barksdale Control Products will also be targeting OEM accounts directly.
This article was originally published on Engineeringtalk on 9 March 2001 at 8.00am (UK)
Related stories
Barksdale starts 2002 with new office move
Barksdale Control Products, Europe's leading manufacturer of pressure, level, flow and temperature sensors, has moved to new premises at the Viewpoint business centre located in Basingstoke, Hampshire
Liquid level monitor takes temperature too
Compact top mounting level and temperature switch can provide two level switch contacts for 'low' level and 'low low' level indication
As the company's new Sales Manager for the UK and Ireland, David Thomas, explains, 'Traditionally, Barksdale has been known for its mechanical flow, level, temperature and pressure sensors and, although we are continuing to manufacture and develop these products, we are also introducing a new generation of electronic instruments.
These are extremely advanced, offering end users considerable benefits in terms of functionality, performance and reliability, making them equally suitable for both high volume and specialised applications.
We will therefore be working with our distributors and OEM customers to help them maximise the opportunities from this new technology'.
Further reading
Switches take control of fluid flows
Robust and dirt resistant flow switches are designed for measuring and controlling liquid media
Magnetic switch is versatile at level control
The new UNS-RG40 level switch is designed for versatile applications in shipbuilding and plant engineering
The first of this new generation of products is the microprocessor controlled UDS7 pressure switch, which is an extremely reliable, stable instrument, with an operating life at least ten times greater than a traditional mechanical device.
The new switch features an alphanumeric dot matrix display, tactile membrane keys for data input, plus LEDs to show set points and alarms, and is ideal for a wide range of applications, including all hydraulic equipment, injection moulding machines, engine test units and process lines.
Outputs can be analogue or digital, with RS232 connections enabling each unit to be connected directly to higher level monitoring and control systems.
David Thomas believes that the UK market offers considerable opportunity for Barksdale Control Products.
'We have already started recruited a number of key distributors of which included Hawco and ACAL and have identified a number of potential high volume applications in both traditional manufacturing and process sectors, where our new products and technology can play an important role in improving the performance of production, measurement and monitoring systems'.
Your seat belt will save your life
Spillard Safety Systems claims that 10% of accidents in quarries result from vehicles overturning
Spillard Safety Systems claims that 10% of accidents in quarries result from vehicles overturning The Supply of Machinery (Safety) Regulations 1992 requires that seat belts or equivalent devices be fitted to vehicles with roll over protection standard (ROPS) cabs, i.e machines of over 15 kW power.
This article was originally published on Engineeringtalk on 22 March 2001 at 8.00am (UK)
Related stories
Guide to whole-body vibration (WBV)
Whole-body vibration (WBV) is the term given to the transmission of vibration into the human body
Strobe beacons flash the warning
Spillard Safety Systems has recently launched its own range of dual-voltage xenon strobe beacons
They must be fitted to tracked or wheel loaders, fork lift trucks, backhoe loaders, tracked or wheeled dozers, scrapers, graders, articulated and rigid dumptrucks.
To ensure that they are worn; provide a comfortable belt that adjusts with both the movement of the driver and the motion of the seat.
Cabs and belts should be kept clean and OPERATORS should carry out regular checks of their condition.
Further reading
Site has over 100 machine visibility assessments
Spillard Safety Systems is re-launching its website as 'a valuable source of information for customers, rather than a selling tool'
Commendation for object detection system
The PreView object detection system has received a special commendation at the SED 2004 Awards for Excellence for nonoperated plant and support products
Not only could a defect lead to a prohibition but also it will seriously jeopardise the safety of your passengers.
Belts can become damaged at any stage of the vehicle's life and a small 4 mm cut or a hole the size of a shirt button in a seatbelt may reduce its strength by a staggering 70%.
Under no circumstances, should used or second-hand belts be fitted.
In an accident the belt absorbs some of the enormous energies by stretching.
Even at just 30mph the rapid deceleration is equivalent to hurling an adult seatbelt wearer against the belt with a weight equivalent to a three-tonne elephant.
This can cause the belt to permanently stretch by up to 13%.
Next time round it would not absorb the same energy in an impact and that could mean - the difference between life and death.
The areas to check on the automatic seatbelts are the seatbelt webbing, the buckles and the retractors.
Wear and tear or abuse can affect all these parts.
SSS suggests these should be checked for the following signs: * Webbing with frayed edges caused by general wear and tear * Webbing with nicks, cuts or holes caused by abuse * Buckles which don't lock securely or have become worn out due to wear and tear * Buckles that have been damaged by being caught, stamped on, or have had items such as sweets and chewing gum pushed into them * Retractor mechanisms which don't fully retract the belt or lock the belt securely into position In any of the above circumstances the belts should be replaced.
SSS who specialise in the retro fitting of seat restraint systems can offer many alternatives to the standard auto type lapbelt.
These include the SP500 - a standard inertia type belt working on the same principle as a car seat belt; wearers have complete movement until a problem arises resulting in the inertia locking, holding the wearer firmly in his seat.
The inertia type lapbelt provides both comfort and safety for the wearer.
SP500E Electronic Lapbelt - a standard inertia type belt utilising an electronic micro switch, when connected to the clasp it can switch off either a visual or audible warning device or both.
Spillard Safety Systems claims that 10% of accidents in quarries result from vehicles overturning The Supply of Machinery (Safety) Regulations 1992 requires that seat belts or equivalent devices be fitted to vehicles with roll over protection standard (ROPS) cabs, i.e machines of over 15 kW power.
This article was originally published on Engineeringtalk on 22 March 2001 at 8.00am (UK)
Related stories
Guide to whole-body vibration (WBV)
Whole-body vibration (WBV) is the term given to the transmission of vibration into the human body
Strobe beacons flash the warning
Spillard Safety Systems has recently launched its own range of dual-voltage xenon strobe beacons
They must be fitted to tracked or wheel loaders, fork lift trucks, backhoe loaders, tracked or wheeled dozers, scrapers, graders, articulated and rigid dumptrucks.
To ensure that they are worn; provide a comfortable belt that adjusts with both the movement of the driver and the motion of the seat.
Cabs and belts should be kept clean and OPERATORS should carry out regular checks of their condition.
Further reading
Site has over 100 machine visibility assessments
Spillard Safety Systems is re-launching its website as 'a valuable source of information for customers, rather than a selling tool'
Commendation for object detection system
The PreView object detection system has received a special commendation at the SED 2004 Awards for Excellence for nonoperated plant and support products
Not only could a defect lead to a prohibition but also it will seriously jeopardise the safety of your passengers.
Belts can become damaged at any stage of the vehicle's life and a small 4 mm cut or a hole the size of a shirt button in a seatbelt may reduce its strength by a staggering 70%.
Under no circumstances, should used or second-hand belts be fitted.
In an accident the belt absorbs some of the enormous energies by stretching.
Even at just 30mph the rapid deceleration is equivalent to hurling an adult seatbelt wearer against the belt with a weight equivalent to a three-tonne elephant.
This can cause the belt to permanently stretch by up to 13%.
Next time round it would not absorb the same energy in an impact and that could mean - the difference between life and death.
The areas to check on the automatic seatbelts are the seatbelt webbing, the buckles and the retractors.
Wear and tear or abuse can affect all these parts.
SSS suggests these should be checked for the following signs: * Webbing with frayed edges caused by general wear and tear * Webbing with nicks, cuts or holes caused by abuse * Buckles which don't lock securely or have become worn out due to wear and tear * Buckles that have been damaged by being caught, stamped on, or have had items such as sweets and chewing gum pushed into them * Retractor mechanisms which don't fully retract the belt or lock the belt securely into position In any of the above circumstances the belts should be replaced.
SSS who specialise in the retro fitting of seat restraint systems can offer many alternatives to the standard auto type lapbelt.
These include the SP500 - a standard inertia type belt working on the same principle as a car seat belt; wearers have complete movement until a problem arises resulting in the inertia locking, holding the wearer firmly in his seat.
The inertia type lapbelt provides both comfort and safety for the wearer.
SP500E Electronic Lapbelt - a standard inertia type belt utilising an electronic micro switch, when connected to the clasp it can switch off either a visual or audible warning device or both.
Tuesday, September 4, 2007
All Round Vision
Spillard Safety Systems a leading supplier of all round vision safety products is to offer independent visibility and site studies
Spillard Safety Systems a leading supplier of all round vision safety products is to offer independent visibility and site studies, which will advise, where necessary, which visibility aids are required and if already fitted whether they need adjustment. European legislation states ' - Visibility from the driving position must be such that the driver can in complete safety to himself and the exposed persons, operate safely, the machinery and its tools in their intended conditions of use.
This article was originally published on Engineeringtalk on 22 March 2001 at 8.00am (UK)
Related stories
Guide to whole-body vibration (WBV)
Whole-body vibration (WBV) is the term given to the transmission of vibration into the human body
Strobe beacons flash the warning
Spillard Safety Systems has recently launched its own range of dual-voltage xenon strobe beacons
Where necessary, appropriate devices must be provided to remedy hazards due to inadequate vision.' Workplace vehicles are now required to be manufactured so that visibility from the vehicles' driving position is such that operators can drive vehicles both for their own safety and that of personnel in the immediate vicinity.
Where necessary, appropriate devices must be provided to remedy hazards due to inadequate direct and indirect vision.
A harmonised european standard on earthmoving vehicles has also been published that specifies particular aids such as mirrors, ultrasonic devices and TV devices, which may be used to improve visibility from the driver position.
A recent survey carried out by the Health and Safety Executive, stated that 25% of all vehicles used on construction sites still have defective all round vision and concludes ' you must be able to see all around the vehicle 1m out and 1m high.
Fitting of mobile CCTV and the correct installation of convex wide angled mirrors will achieve this requirement ' an extract taken from HSE Quarry Fact File December 2000.
Spillard Safety Systems a leading supplier of all round vision safety products is to offer independent visibility and site studies, which will advise, where necessary, which visibility aids are required and if already fitted whether they need adjustment. European legislation states ' - Visibility from the driving position must be such that the driver can in complete safety to himself and the exposed persons, operate safely, the machinery and its tools in their intended conditions of use.
This article was originally published on Engineeringtalk on 22 March 2001 at 8.00am (UK)
Related stories
Guide to whole-body vibration (WBV)
Whole-body vibration (WBV) is the term given to the transmission of vibration into the human body
Strobe beacons flash the warning
Spillard Safety Systems has recently launched its own range of dual-voltage xenon strobe beacons
Where necessary, appropriate devices must be provided to remedy hazards due to inadequate vision.' Workplace vehicles are now required to be manufactured so that visibility from the vehicles' driving position is such that operators can drive vehicles both for their own safety and that of personnel in the immediate vicinity.
Where necessary, appropriate devices must be provided to remedy hazards due to inadequate direct and indirect vision.
A harmonised european standard on earthmoving vehicles has also been published that specifies particular aids such as mirrors, ultrasonic devices and TV devices, which may be used to improve visibility from the driver position.
A recent survey carried out by the Health and Safety Executive, stated that 25% of all vehicles used on construction sites still have defective all round vision and concludes ' you must be able to see all around the vehicle 1m out and 1m high.
Fitting of mobile CCTV and the correct installation of convex wide angled mirrors will achieve this requirement ' an extract taken from HSE Quarry Fact File December 2000.
A new concept in construction vehicle seating
A new concept in construction seating, the Sears R'range incorporates a full harness seat belt system suitable for all types of quarrying and mining equipment
A new concept in construction seating, the Sears R'range incorporates a Full harness seat belt system suitable for all types of quarrying and mining equipment. The seat belt, a three point harness, utilises an inertia type retractor which is fully enclosed within the structure of the seat making it impenetrable to the elements.
This article was originally published on Engineeringtalk on 22 March 2001 at 8.00am (UK)
Related stories
Guide to whole-body vibration (WBV)
Whole-body vibration (WBV) is the term given to the transmission of vibration into the human body
Tested to ISO6683 the R'range, available in both air and mechanical suspensions, can be supplied in various specifications to provide pricing to suit varied budgets.
FEATURES * Spillard R.o.R (Full harness roll over restraint belt) * Double depth comfort cushions * Upper backrest height adjustable * Back angle fully adjustable (45 position) * Adjustable damper * Seat height adjustment 76mm * weight adjustment 50 -150 kg * Suspension stroke 90mm * Fore-aft slide travel 160mm * Hard wearing impervious fabric or vinyl cushions * Heavy duty double lock slides * Seat cushion tilt 7deg * Air lumber support * Performance to ISO 7096 Class 3 and Class 4 The 4025R and the 4065R will be launched at this year's SED 2001 and Hillhead 2001 exhibitions and will compliment the existing range of Sears Seats currently supplied by Spillard Safety Systems Ltd to the UK construction equipment aftermarket.
Their new range of seating manufactured in South Wales can be customised to fit any specific application.
A new concept in construction seating, the Sears R'range incorporates a Full harness seat belt system suitable for all types of quarrying and mining equipment. The seat belt, a three point harness, utilises an inertia type retractor which is fully enclosed within the structure of the seat making it impenetrable to the elements.
This article was originally published on Engineeringtalk on 22 March 2001 at 8.00am (UK)
Related stories
Guide to whole-body vibration (WBV)
Whole-body vibration (WBV) is the term given to the transmission of vibration into the human body
Tested to ISO6683 the R'range, available in both air and mechanical suspensions, can be supplied in various specifications to provide pricing to suit varied budgets.
FEATURES * Spillard R.o.R (Full harness roll over restraint belt) * Double depth comfort cushions * Upper backrest height adjustable * Back angle fully adjustable (45 position) * Adjustable damper * Seat height adjustment 76mm * weight adjustment 50 -150 kg * Suspension stroke 90mm * Fore-aft slide travel 160mm * Hard wearing impervious fabric or vinyl cushions * Heavy duty double lock slides * Seat cushion tilt 7deg * Air lumber support * Performance to ISO 7096 Class 3 and Class 4 The 4025R and the 4065R will be launched at this year's SED 2001 and Hillhead 2001 exhibitions and will compliment the existing range of Sears Seats currently supplied by Spillard Safety Systems Ltd to the UK construction equipment aftermarket.
Their new range of seating manufactured in South Wales can be customised to fit any specific application.
Wide new range of optical safety barriers
Sensor Consultants introduce the Techno GR range of optical safety barriers, available in Class 2 and Class 4 safety levels and covering heights between 300mm and 1600mm
Sensor Consultants introduce the Techno GR range of optical safety barriers. These barriers are available in Class 2 and Class 4 safety levels and cover heights between 300mm and 1600mm and widths of up to 15 metres. They feature solid state and relay outputs, automatic or manual resetting, muting etc.
There are versions with separate electronics as well as ones with fully self-contained electronics.
Other products include perimeter guarding, safety relays, safety optical sensors, height measuring opto systems etc.
Sensor Consultants introduce the Techno GR range of optical safety barriers. These barriers are available in Class 2 and Class 4 safety levels and cover heights between 300mm and 1600mm and widths of up to 15 metres. They feature solid state and relay outputs, automatic or manual resetting, muting etc.
There are versions with separate electronics as well as ones with fully self-contained electronics.
Other products include perimeter guarding, safety relays, safety optical sensors, height measuring opto systems etc.
Monday, September 3, 2007
Safety interlock switch can never be bypassed
Schmersal (UK) have introduced a new range of safety interlock switches that are activated by an individually-coded, geometrically-unique, actuating key with 15,000 different combinations
Schmersal (UK) Ltd, specialists in man-machine safety systems, have introduced a new range of safety interlock switches that are activated by an individually-coded, geometrically-unique, actuating key with 15,000 different combinations. Conventional safety interlock switches are only available with a standard key (actuator), designed to prevent the guard switch being bypassed using screwdrivers, paperclips and other objects.
This article was originally published on Engineeringtalk on 14 March 2000 at 8.00am (UK)
Related stories
Seminars get engineers up to speed on standards
Schmersal is running a series of free specialist seminars to give design engineers working on safety-related control systems for machines the competence required to apply BS EN ISO13849-1:2006
Machine safety components set for showing
Machine safety specialist Schmersal will exhibit on Stand C7 at the Machine Building exhibition at the NEC, Birmingham on 14th and 15th February 2007
However, these switches can be bypassed using a similar standard key obtained from another machine or from the stores department.
This practice is particularly common in plants where a large number of machines are fitted with the same type of switch.
Schmersal individually-coded, safety interlock switches represent a new generation of mechanical guard switches.
And with 15,000 key combinations available, engineers can now specify a switch, safe in the knowledge that it can never be bypassed with a key from another machine.
The tamper-resistant design includes non-removable actuating heads and high-strength stainless steel keys that tolerate mechanical abuse without damage.
Further reading
Safety switches clean up food processing
Machine safety equipment manufacturer Schmersal has produced a brochure previewing its Series N range of hygienic safety switches for the food processing industry
New website for Schmersal
Man-machine safety specialist Schmersal has published a new-look website to provide customers with the latest product news and specifications
New Safety Relay Brochure from Schmersal
Schmersal's range of Protect-SRB safety relay modules is one of the most comprehensive available for the signal processing of emergency-stop, interlocking and other protective devices
The three versions available - AZ16zi, AZ17zi and AZ20zi - are designed for use as safety interlocks on moveable machine guards which, when open, expose operators or maintenance personnel to machine hazards.
Typical applications include protective gratings, hinged or swiveling covers, access panels and other types of moveable guards.
An IP67 rating also makes the switches ideal for hostile environments.
All versions are of two-piece design, consisting of a switch mechanism and an individually-coded actuator key that is hard-mounted directly to the moveable guard.
When the guard is opened the normally-closed (NC) contacts are forced to open through a direct mechanical linkage with the key.
The positive-break NC contacts ensure that, when the key is removed, the circuit is interrupted and the machine is stopped.
When the guard is closed the key forces the NC contacts to re-close and NO contacts to re-open.
The switches are also available in 3 pole versions with one normally open and two normally closed.
This gives greater flexibility because two contacts can be connected directly to an appropriate safety relay with the third available as a signaling contact.
To allow flexibility when installing the switches, four key entry locations are available on the AZ16zi and AZ17zi, and two are available on the AZ20zi.
The AZ20zi also features high-speed key withdrawal.
All switches meet stringent international safety standards including BG, UL and CSA
Schmersal (UK) Ltd, specialists in man-machine safety systems, have introduced a new range of safety interlock switches that are activated by an individually-coded, geometrically-unique, actuating key with 15,000 different combinations. Conventional safety interlock switches are only available with a standard key (actuator), designed to prevent the guard switch being bypassed using screwdrivers, paperclips and other objects.
This article was originally published on Engineeringtalk on 14 March 2000 at 8.00am (UK)
Related stories
Seminars get engineers up to speed on standards
Schmersal is running a series of free specialist seminars to give design engineers working on safety-related control systems for machines the competence required to apply BS EN ISO13849-1:2006
Machine safety components set for showing
Machine safety specialist Schmersal will exhibit on Stand C7 at the Machine Building exhibition at the NEC, Birmingham on 14th and 15th February 2007
However, these switches can be bypassed using a similar standard key obtained from another machine or from the stores department.
This practice is particularly common in plants where a large number of machines are fitted with the same type of switch.
Schmersal individually-coded, safety interlock switches represent a new generation of mechanical guard switches.
And with 15,000 key combinations available, engineers can now specify a switch, safe in the knowledge that it can never be bypassed with a key from another machine.
The tamper-resistant design includes non-removable actuating heads and high-strength stainless steel keys that tolerate mechanical abuse without damage.
Further reading
Safety switches clean up food processing
Machine safety equipment manufacturer Schmersal has produced a brochure previewing its Series N range of hygienic safety switches for the food processing industry
New website for Schmersal
Man-machine safety specialist Schmersal has published a new-look website to provide customers with the latest product news and specifications
New Safety Relay Brochure from Schmersal
Schmersal's range of Protect-SRB safety relay modules is one of the most comprehensive available for the signal processing of emergency-stop, interlocking and other protective devices
The three versions available - AZ16zi, AZ17zi and AZ20zi - are designed for use as safety interlocks on moveable machine guards which, when open, expose operators or maintenance personnel to machine hazards.
Typical applications include protective gratings, hinged or swiveling covers, access panels and other types of moveable guards.
An IP67 rating also makes the switches ideal for hostile environments.
All versions are of two-piece design, consisting of a switch mechanism and an individually-coded actuator key that is hard-mounted directly to the moveable guard.
When the guard is opened the normally-closed (NC) contacts are forced to open through a direct mechanical linkage with the key.
The positive-break NC contacts ensure that, when the key is removed, the circuit is interrupted and the machine is stopped.
When the guard is closed the key forces the NC contacts to re-close and NO contacts to re-open.
The switches are also available in 3 pole versions with one normally open and two normally closed.
This gives greater flexibility because two contacts can be connected directly to an appropriate safety relay with the third available as a signaling contact.
To allow flexibility when installing the switches, four key entry locations are available on the AZ16zi and AZ17zi, and two are available on the AZ20zi.
The AZ20zi also features high-speed key withdrawal.
All switches meet stringent international safety standards including BG, UL and CSA
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