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ENCLOSURES Diecast aluminium enclosures
for terminal electronics: Specification beyond protection
S
pecifying a diecast enclosure for terminal electronics calls for a different approach: there are special considerations. While fundamental requirements such as durability, ingress protection and aesthetics remain important, terminal electronics applications place greater emphasis on heat dissipation, installation flexibility, cable access and reliability in harsh operating environments. Thermal performance can often be the defining consideration. Terminal electronics frequently contain power supplies, controllers, communication devices, sensors and interfaces that generate heat within confined spaces. These systems may operate continuously in elevated ambient temperatures. The enclosure must therefore function as a heat sink, efficiently transferring thermal energy away from internal components. Diecast aluminium is particularly well suited to this role due to its excellent thermal conductivity, allowing the enclosure body itself to contribute to temperature management without the complexity of active cooling systems.
Mechanical durability is equally important. Terminal enclosures are routinely installed in factories, processing plants, utilities infrastructure and outdoor locations where vibration, impact and environmental contamination are common.
Environmental protection requirements are also more demanding. Terminal electronics often operate in dusty, wet or chemically aggressive environments. Engineers must therefore consider ingress protection ratings, gasket integrity and corrosion resistance. Aluminium enclosures with IP ratings of IP 66 or higher offer long-term protection against moisture and airborne contaminants, while also providing effective electromagnetic shielding (though attention must be paid to potential EMI/RFI weak points such as gaskets and grommets).
Another critical requirement is installation practicality. The enclosures must accommodate cable entry systems, terminal blocks and connectors and also offer good access for maintenance. Internal space utilisation, mounting options and ease of assembly can significantly affect installation costs and serviceability throughout the product lifecycle.
A good diecast aluminium terminal enclosure successfully balances all these requirements.
ROLEC’s diecast aluminium enclosure models illustrate how different design approaches can address specific terminal electronics requirements. Tried-and-trusted aluCASE (IP 66, IP 67, IP 69K) is well suited to applications in which thermal performance and mechanical protection are key concerns. These high- quality diecast aluminium housings offer excellent heat dissipation while maintaining a compact footprint. Robust construction, high ingress protection and ‘lid closed’ installation make aluCASE suitable for industrial control systems, interface electronics and monitoring equipment in challenging environments. The enclosure’s clean external design also allows it to be deployed in locations where visible equipment must maintain a professional appearance.
For applications requiring greater installation flexibility, aluKOM (IP 66) is compatible with other standard enclosures, enabling quick and easy replacement of existing units. Generous internal space and practical mounting features simplify the integration of terminal blocks, communication modules and control electronics.
ROLEC’s aluNORM (IP 66, IP 67) range addresses applications in which standardisation and compatibility are important. Designed with industrial installations in mind, these enclosures provide
a familiar and practical platform for terminal electronics. Their tough diecast construction ensures reliable operation in uncompromising environments, while the enclosure geometry facilitates straightforward integration into machinery, plant equipment and infrastructure projects. This makes aluNORM especially suitable for control, measurement and instrumentation systems where reliability and ease of deployment are essential. Innovative conFORM (IP 66, IP 67) offers built-in EMC shielding, removing the need for a separate conductive gasket. Instead, conFORM uses a patented tooth-and-rail system cast into the base and lid. This ensures dependable electrical continuity, preserving the protective Faraday Cage and making the enclosures ideal for applications that involve regular opening and closing of the lid for inspection and maintenance. So there is no compromise between ingress protection and EMC shielding – conFORM keeps the two processes separate for optimal performance.
ROLEC can supply all four enclosure models fully customised. Services include machining of apertures for controls, interfaces and displays; custom colours (powder coating or wet painting); printing of legends, logos and photo-quality graphics, and pre-fitting of accessories such as cable grommets or pressure compensation elements. The aim is for the customer to receive the enclosures ‘production line ready’ for installation of the electronics.
JULY/AUGUST 2026 | ELECTRONICS FOR ENGINEERS 19
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