Product category:
Electrical systems
News Release from: R Stahl | Subject: IS isolator series
Edited by the Manufacturingtalk Editorial
Team on 18 April 2003
Isolators designed for intrinsically
safe circuits
An innovative and future-leading series of modules for intrinsically safe circuits, an isolator series has two input channels; all standard analogue and digital signals are accommodated.
Paving a new direction in safety isolation, R Stahl has launched the IS isolator series, an innovative and future-leading series of modules for intrinsically safe circuits The series consists of IS pac modules, together with two mounting options, IS pac bus and IS pac carrier, to form a solution for every installation
This article was originally published on Manufacturingtalk on 2 Sep 2003 at 8.00am (UK)
Related stories
Intrinsic safety engineering enters fieldbus era
With the widespread acceptance of fieldbus, intrinsic safety engineering has to change direction to adapt to digitalisation, de-centralisation, and product standardisation.
Crane kits cut costs, improve safety, lighten load
Crane builder has finally solved the problem of transporting long and heavy crane bridges half-way around the world: send them in kit of hoist gear, end carriage and all electrical fittings.
Each galvanically isolated, compact 17.6mm module has two input channels; all standard analogue and digital signals are accommodated.
Display and control elements, such as DIP switches, are on the front side with sufficient space for individual labeling.
A new feature of the IS pac are the removable terminals that allow modules to be exchanged while the system is in operation.
Further reading
Reliable SS plug connectors meet hazards
An updated and optimised version of a mini plug connector system makes operating errors and damage impossible, even when the system is used in dirty or corrosive environments.
Control units operate in hazardous dusts
Control units are designed for use in areas where combustible dusts are a hazard and such areas include mills, malting plants and milk powder manufacturing facilities.
The isolators have integrated line error messaging systems that can be set up on an individual channel basis, or a collective messaging system can be implemented with the pac Bus or pac Carrier.
There are three ways the modules can be mounted in the control cabinet.
First, they can simply be snapped onto a DIN rail and wired individually for use.
For more mounting sophistication, Stahl provide two options.
The first is the IS pac bus, which consists of small plastic connectors which fit inside the DIN rail.
Any number of pac bus connectors can be assembled until the desired length is attained.
The pac modules then plug into the pac bus using the customary tilt-on procedure.
The advantage of the pac bus is that all the IS pac modules can be powered from a single input module that is mounted anywhere on the bus (a second input module can be added for redundancy) and line errors and power supply failures are relayed over floating contacts as collective messages.
A second mounting option provided by Stahl is the IS pac carrier.
With either 8 or 16 slots, the pac carrier provides the opportunity to house the IS pac modules and connect them to a control system via fieldbus modules or a HART multiplexer.
The pac carrier has, as standard features, a redundant and safety fuse-protected power supply as well as error messaging regarding the status of power interruptions and line errors.
It can snap onto a DIN rail or it can be screwed directly to a mounting plate.
The isolator series modules and mounting options are approved in accordance with ATEX and meet international requirements.
The series is designed for application in Zone 2, respectively Division 2, as well as for use in combustible dust-Ex circuits.
All units are vibration and shock tested, and operate in ambient temperatures ranging from -20degC to +70degC.
About Stahl - with an annual turnover of EUR 240 million and over 2,000 employees worldwide, the R.
Stahl Technology Group is a leading supplier of explosion protection and material handling components and installations.
• R Stahl: contact details and other news
• Email this article to a colleague
• Register for the free Manufacturingtalk email newsletter
• Manufacturingtalk Home Page
Search the Pro-Talk network of sites
