mobile | classic
Dataweek Electronics & Communications Technology Magazine

Follow us on:
Follow us on Facebook Share via Twitter Share via LinkedIn


Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2019


Cases developed for the high-tech sector
14 June 2006, Enclosures, Racks, Cabinets & Panel Products

Today and in the future, cases serve the purpose of securely packaging electronic and electro-mechanical components. However, despite functionality, their visual appearance and quality finish play an ever more important part, especially with measuring and control products in high technology areas.

Companies developing and manufacturing such products cannot sell products that look as if they come 'from a market stall'. The external appearance is of utmost importance and has to reflect the high quality of the end product.

Schroff is a leading entity in the area of 19" enclosure technologies and is known for technically-refined products. The company's ratiopacPRO case system was adapted to high quality and reliability design concepts. In this article, the company describes this system, which allows sufficient scope for individual adjustments and various configurations.

The ratiopacPRO comprises a visually attractive range of cases with optimal space
The ratiopacPRO comprises a visually attractive range of cases with optimal space

ratiopacPRO: optimising space and appearance

Schroff has been aware of the increasing demands on design for a long time. At the same time, new technologies and standards relating to computer systems like VME64x and CompactPCI have changed demands on packaging systems.

In this unit up to 26 ratiopacPRO cases are being employed
In this unit up to 26 ratiopacPRO cases are being employed

The company's well-established subrack range serves as the platform for the complete ratiopacPRO range. Users are able to thus fall back on the extensive range of accessories, ie, guide rails of 19" subracks that can be coded, or ESD-clips for the discharge of static electricity on the guide rail and board retainers. The cases meet the requirements of today's 19" standard as well as the US standard IEEE1101.10/.11, and are therefore able to receive extractor handles for high extraction force with CompactPCI and VME64x units (eg, Schroff's IE-handles).

The ratiopacPRO range was constructed with the aim to create a modern and yet timeless outward appearance. The grey/silver design is visually appealing and at the same time 'timeless'. Schroff managed to minimise the seams of the panels. This has resulted in smooth, easy-to-clean surfaces. From the outside no screws are visible. For the front, depending on requirement, handles, 19" brackets or cover plates can be used.

Transforms into a tabletop unit

To remove cover plates and front panels users do not have to disassemble front panels or rear feet of the case. Instead, a press-on facility enables quick and easy handling, without the necessity of special tools. This construction offers EMC shielding greater than 25 dB at 1 GHz, even in the standard version, and this is without additional shielding material. If the user requires a higher degree of shielding, the case can be retrofitted with appropriate gasketing.

The customer has the choice of various models. There is a space-optimising version in the heights of 3, 4 and 6U, as well as versions with integrated fans for high heat dissipation, which are then 1U higher appropriately. The refined air flow concept allows the user to stack the 1U higher cases on top of each other without losing space and without heat increase - either in the cabinet or on the table.

Assembly with 19" components

From the front all ratiopacPRO subracks have a uniform appearance. All cases feature the application specific depth of 420 mm to utilise the internal space. Apart from customer-specific depth and width, special paint finishes as well as four colour screen prints are available within the range of modifications. Removable shielded and hinged front covers are used, which allow quick and maintenance-friendly access.

ratiopacPRO with shielded, hinged front panel, recessed 19” plug-in units and individual rear assembly on a chassis plate
ratiopacPRO with shielded, hinged front panel, recessed 19” plug-in units and individual rear assembly on a chassis plate

The assembly of the 19" subracks varies considerably. For some cases, entirely customer-specific modules are used which do not have standard dimensions, whilst Schroff uses standard 19" plug-in units for other subracks. "We depend on flexible, electronic plug-in units, which we integrate into small cases and frame type plug-in units," explains the design engineer. "These modules can be tested completely separately and are easier to handle with regard to EMC. The individual modules are mounted to the chassis plate of the ratiopacPRO, completely configured and tested as an operational unit. Like a drawer, we then slide the entire chassis plate with its assemblies into the case, and only six screws later it is fully assembled."

But even with the use of 19" plug-in units, Schroff prefers an individual solution. Thanks to a grid of holes in the side panels, the guide rails, and with this the board position, can easily be recessed to the rear. In principle, it is possible to assemble 19" plug-in units with standard components, eg, horizontally, or with 3U and 6U areas in one case. The front and rear of the ratiopacPRO being symmetric, users can generally slide in subracks from the front (e.g. monitors) as well as from the rear (eg, network parts without having to remove cover plates.


Due to its high flexibility, ratiopacPRO has proven itself being ideally suited for the installation of standardised components as well as for the unconventional configuration. For test purposes, or when still in the prototype phase, the completely panelled case modules can be plugged into a movable rack or into a smaller unit and later, without additional cost, they can be transferred into the final cabinet system.

Supplied By: Actum Electronics
Tel: +27 11 608 3001
Fax: +27 11 608 1918
  Share on Facebook Share via Twitter Share via LinkedIn    

Further reading:

  • Digital workflow eases selection of Schroff products
    28 August 2019, Actum Electronics, Enclosures, Racks, Cabinets & Panel Products
    nVent Schroff has a series of coordinated services that simplify and speed up the digital workflow from selection to delivery of Schroff products. Now when users search for products on
  • Subrack configuration software
    31 July 2019, Actum Electronics, Design Automation
    Schroff has launched the EuropacPRO Subrack Configurator, an intelligent online design tool that enables users to configure individual EuropacPRO subracks for vertically-installed applications. This ...
  • Sealed enclosures for industrial electronics
    26 June 2019, Electrocomp, Enclosures, Racks, Cabinets & Panel Products
    Hammond Manufacturing has added 36 new configurations to its 1554 and 1555 sealed enclosure families for Industry 4.0. Available in ABS or polycarbonate with styled, opaque, clear or smoked lids, the ...
  • Vent panels for increased airflow and EMI protection
    26 June 2019, Actum Electronics, Circuit & System Protection
    Vent panels made by Laird Technologies offer effective ventilation within electronic equipment, while upholding signal integrity of the enclosure. Its MaxAir and ElectroVent solutions consist of layered, ...
  • ebm-papst expands AxiBlade fan range
    26 June 2019, Ebmpapst South Africa, Enclosures, Racks, Cabinets & Panel Products
    Axial fans, which are used in air-conditioning and refrigeration systems such as evaporators, condensers and heat pumps, must fulfil high requirements with regard to air flow, energy efficiency and noise. ...
  • Verotec supplies turnkey enclosure for NMR monitoring
    26 June 2019, Vepac Electronics, Enclosures, Racks, Cabinets & Panel Products
    TgK Scientific’s InsightXpress new stop-flow delivery pumps enable the screening of reaction conditions by nuclear magnetic resonance (NMR) at an unprecedented speed for industrial and academic scientists ...
  • Actum acquires Band-It business in South Africa
    29 May 2019, Actum Electronics, News
    The Actum Group has acquired Banding and Identification Solutions Africa (BISA), the leading distributor of Band-It clamping and fastening products in South Africa. The transaction, which was finalised ...
  • Verotec VMEbus hardware chosen for anti-tank system
    29 May 2019, Vepac Electronics, Enclosures, Racks, Cabinets & Panel Products
    Verotec has been selected by a top 10 global defence contractor to supply seven different variants of VMEbus system hardware, backplanes and PSU sub-systems for a land-based US anti-tank system. The ...
  • Aluminium profile enclosures
    29 May 2019, Avnet South Africa, Enclosures, Racks, Cabinets & Panel Products
    In addition to its wide range of plastic enclosures, OKW also offers elegant aluminium enclosures. The two product groups, Synergy and Smart-Terminal, feature good stability, heat dissipation and a high-quality ...
  • Outdoor housings in compact format
    29 May 2019, Phoenix Contact, Enclosures, Racks, Cabinets & Panel Products
    The outdoor housings of the Phoenix Contact ECS series are now also available in a more compact design. The shorter installation depth of 109 mm – instead of 169 mm – is especially suitable for space-critical ...
  • ERNI hands over D-Sub production
    30 April 2019, Actum Electronics, Interconnection
    ERNI has discontinued its D-Sub connector portfolio and partnered with Provertha, which will now be manufacturing and selling the D-Sub product portfolio into key markets. Rudolf Hausladen, group CEO ...
  • Passive intermodulation analyser
    30 April 2019, Actum Electronics, Test & Measurement
    Passive intermodulation (PIM) is one of the main causes of faults in modern networks. PIM can significantly reduce the network quality with regard to range and data transmission. PIM is caused by a number ...

Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronics Buyers’ Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Terms & conditions of use, including privacy policy
PAIA Manual


    Classic | Mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.