Product category:
Plant- and Machine-Wide Communications
News Release from: Hayes Control Systems | Subject: Coupler bus box
Edited by the Engineeringtalk Editorial
Team on 01 February 2002
Speed of fibre optics, versatility of
copper wire
A new fieldbus coupler bus box makes it easy to design fieldbus installations combining the high operating speed and good noise immunity of fibre optics with the versatility of copper-based systems
The new fieldbus coupler bus box from Hayes Control Systems makes it easy to design fieldbus installations which combine the high operating speed and excellent noise immunity of fibre optics with the versatility of copper-based systems The compact coupler bus box provides a convenient and cost-effective bridge between IP-link fibre-optic networks, and the enormous range of input/output extension bus boxes which are available from Hayes
This article was originally published on Engineeringtalk on 28 Nov 2007 at 8.00am (UK)
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The coupler bus boxes, which have an IP67 rating, making them suitable for on-plant mounting without the need for further protection, are manufactured in Germany by Beckhoff, for whom Hayes Control Systems is the exclusive UK distributor.
The bus boxes are designed to complement Beckhoff's IP-link fibre-optic network system, which operates at 2Mbits/s - equivalent to the transmission of 1,000 items of binary input/output data in approximately one millisecond.
Each of the new Beckhoff fieldbus coupler bus boxes from Hayes has four digital inputs and four digital outputs built in, but this capacity can be expanded enormously by connecting up to 255 Beckhoff extension modules in a daisy-chain configuration.
Extension modules are available in a wide variety of types to support digital, analogue and special input and output signals.
To allow even greater flexibility in the design of fieldbus installations based on the new coupler bus boxes, the extension modules connected to them may be spaced up to 5 metres apart.
This means that the maximum length of a daisy-chain containing 255 modules is well over a kilometre - enough to span all but the very largest plants.
To ensure ease of use, the coupler bus boxes automatically recognise, at start-up, the configuration of the extension modules connected to them.
The input/output data collected via these modules is then mapped directly into the process image, with no need for separate manual configuration or addressing.
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