Operator Interfaces, Switches & Relays


Latest Articles

Leverless limit switches good for PLC feedback in Ex zones
May 2001, Switches International
GO Switch has been the market leader in robust leverless limit switches since 1950. These switches offer the feature of no physical contact in order to switch, as they operate on a magnetic basis, sensing ...

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Leverless limit switches for harsh environments
April 2001, Switches International
These switches offer the feature of no physical contact in order to switch, as they operate on a magnetic basis, sensing flat mild steel for its operation. This benefit means that there are no arms to ...

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Electronic pressure switches
April 2001, Instrotech
High quality Kobold Pressure Switches - for where high switching accuracy, long term stability and repeatability on pressure monitoring is required - are now available from Instrotech. Switching ranges ...

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Slot-in switch for profile cylinders with 'T-slot' mounting
March 2001, Shorrock Automation
IFM Electronic's new MK5047 is a slot-in switch for profile cylinders with 'T-slot' mounting. Both mounting and setting are made easier, as there is no need for additional mounting accessories. The switch ...

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Level switch for AC connection
March 2001, Shorrock Automation
The Type KN 0001 programmable capacitive level switches from IFM Electronic are designed for AC connection in level monitoring applications using dry bulk materials or liquids. Detection is possible even ...

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Leverless limit switches for harsh environments
February 2001, Switches International
These switches offer the advantage of needing no physical contact in order to switch, as they operate on a magnetic basis, sensing mild steel for operation. This benefit means that there are no arms to ...

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Improving interference suppression
February 2001, Phoenix Contact
The new screen terminal blocks from Phoenix Contact effectively prevent electro-magnetic interference with the high contact quality of the screen interface. They have reliable, large-area contacts and ...

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Instruments for switching and speed measurement
February 2001
The microprocessor-controlled converters and switching instruments of the Jaquet FT1400 series are for monitoring measured variables as a function of time, such as rotational speed, clock rate, etc. The ...

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Protecting gates and entry points
February 2001, Turck Banner Southern Africa
RET Automation is offering Banner's GM-FA-10J gate monitoring safety module - a new monitoring device for use with both mechanical and magnetic safety switches for control-reliable gate and door guarding ...

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Leverless limit switches
December 2000, Switches International
GO switches are particularly well-suited to harsh environments, such as those found in the power generation industry. They have been a market leader in robust leverless limit switches since 1950. These ...

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Safety switches offer extended flexibility
December 2000, Turck Banner Southern Africa
Banner Engineering is offering the SL-LS42 Series safety switches - advanced-locking style switches available with a choice of features for more flexibility. SI-LS42 switches can be wired to machine safety ...

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Multifunction contactor is more than a switch
December 2000, Endress+Hauser South Africa
Featuring two fully programmable relay contacts, the RTA 421 is best described as a low-cost combination of a contactor, display and power supply. Its compact housing has three pushbuttons for easy front-end ...

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Combined switch, fuse and power socket
December 2000
Three functions compactly packed in one module. The KM from Schurter saves mounting time, space and costs. New and continuously smaller electrical and electronic components lead to continuously smaller ...

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10 A semiconductor relay is only 6,2 mm wide
November 2000
A high switching frequency coupled with the need for a long life span is often too much for the standard electromechanical relay. The advantage of using the solid-state relay, from the MIRO product line, ...

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Alarm systems and their role in abnormal situation management: Part II of IV
July 2000
In Part I, It was mentioned how many plant disturbances can be reduced both in frequency and severity, with surprisingly little additional instrument hardware. Part II continues;

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Alarm systems and their role in abnormal situation management: Part III of IV
July 2000
To minimise alarm floods on major process upsets, one has to filter or suppress alarms in accordance with plant operating mode and alarm priority

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Alarm systems and their role in abnormal situation management: Part IV of IV
July 2000
The importance of correctly ranged transmitters to cover all of the alarm settings is often overlooked, specifically on level applications

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New Switch safety operates from -40 to +200
July 2000
The introduction of new standards in the level of fire protection required for certain applications, has radically reduced the safe life expectancy of some existing switches. Switches functioning at up ...

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Alarm systems and their role in abnormal situation management: Part I of IV
June 2000
Many plant disturbances can be reduced both in frequency and severity, with surprisingly little additional instrument hardware

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Omniflex displays annunciator prowess
May 2000, Omniflex Remote Monitoring Specialists
The Omni-8c and 16c offer a choice of backlit LEDs, sidebar LEDs or incandescent lamps and for neatness and convenience, window no 16 can be replaced by a pushbutton station with the standard 'Test', ...

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