Product category:
Enclosures and Equipment Cooling Fans
News Release from: Schroff UK | Subject: Rear-mount I/O subracks
Edited by the Engineeringtalk Editorial
Team on 15 February 2000
High-reliability CPCI subrack for rear
I/O boards
Schroff devises new high-reliability CPCI subrack for rear I/O boards For rear I/O CPCI subrack systems, Schroff, Europe's leading manufacturer of electronic enclosures, has developed a new range of r
For rear I/O CPCI subrack systems, Schroff, Europe's leading manufacturer of electronic enclosures, has developed a new range of rear-mount I/O subracks for use in high I/O connection systems Commonly used in telecoms and computer telephony applications where hot-swapping is mandatory, these new rear I/O subracks allow for boards to be mounted onto the rear of a CPCI rack system
This article was originally published on Engineeringtalk on 7 Mar 2001 at 8.00am (UK)
Related stories
Software makes for simple configuration of subrack
Schroff, the 19-inch expert, is the first on the market to offer a software program that allows the customer to configure individual subracks, plug-in modules, sub-units and front panels.
Handle protects CPCI boards in 19in units
Schroff's HLS (High Leverage Self-locking) handle fully complies with the IEEE 1101.10 standard and is suitable for the insertion and extraction of all 19" plug-in units.
This dual arrangement enables active boards to be placed at the front of a CPCI system where they can be accessed easily for hot-swapping, and passive boards, which are less likely to be disturbed, to be situated to the rear of a system with complex wiring and power systems.
Schroff's new rear-mount I/O subrack systems fully comply with the IEEE 1101.11 standard for rear board mounting.
In a CPCI subrack system that supports both front and rear board mounting, the backplane becomes a midplane for both plug-in boards.
Further reading
Cut-down prices for CPCI
Europac Integral offers all the benefits of a standard CPCI system including high stability, robustness and EMC shielding but at a far-reduced cost.
More rigid backplanes keep availability high
Stiffening rails add reinforcement to Schroff's new 64-bit 6U CompactPCI backplanes.
To enable electrical connection to the rear plug-in unit, connectors installed into the front of this midplane feature longer pins that protrude the midplane's pcb.
A shroud, placed over these pins on the rear board side, is then used to convert the pins into a male connector for the rear plug-in units to engage to.
To hold the rear board securely, the subrack depth is adapted to fit the rear plug-in units.
This subrack depth is determined by the length of the pins, shroud and rear board.
To ensure the subrack depth is accurate, side panels with a dedicated hole pattern are used to ensure dimensions and tolerances match those of the front-mounted units.
"The distance between the subrack's rear and the inside face of the backplane is a critical dimension (the inspection dimension) which is often overlooked," said Keith Reynolds, Schroff's product marketing manager.
"Omitting this measurement could end with the backplane connector pins not engaging with those on the rear plug-in units- rendering the rear of the system ineffective.
Schroff's rear-mount CPCI I/O solution observes these inspection dimensions." CPCI combines the advantages of proven PC technology with the robustness of 19" systems.
The PCI bus, as used in many offices today, has been coupled with a rugged subrack to produce a low cost, reliable alternative to VME.
Basing CPCI on standard PC technology ensures hardware and software is both well supported competitively priced.
Over the next few years, it is predicted that CPCI will become the de-facto microcomputer packaging systems standard in telecommunications, network and data systems, automation and control, traffic and medical systems around the world.
• Schroff UK: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
Search the Pro-Talk network of sites
