Ziton SMB-DIN2 | Surface Mount Box with DIN Rail | IP66, 2-Unit Capacity

FAQs

What is the difference between SMB-DIN1 and SMB-DIN2?

The SMB-DIN2 provides double the module capacity of the SMB-DIN1. While the SMB-DIN1 accommodates two single-width modules or one double-width module, the SMB-DIN2 can house four single-width modules or two double-width modules. The SMB-DIN2 is also physically larger (180 × 110 × 90mm versus 110 × 110 × 66mm) to accommodate the additional modules. Both share the same IP66 rating and polystyrene construction, but the SMB-DIN2 is the preferred choice for installations where multiple interface functions are required at the same location, such as plant rooms or equipment areas requiring several types of monitoring and control.

Which Ziton modules are compatible with the SMB-DIN2?

The SMB-DIN2 is compatible with the complete range of Ziton A-Series addressable interface modules. This includes the A45E-2 single input module (part 99202), A50E-2 relay module (part 99102), A60E isolator module (part 201301), and A70E-2 conventional zone module (part 202501-101). The enclosure can accommodate up to four single-width modules like the A45E-2 (45mm wide each) simultaneously, or two double-width modules like the A50E-2 (85mm wide each). This flexibility enables various combinations such as two input modules plus one relay module plus one isolator, or two relay modules side-by-side for dual control applications.

What does the IP66 rating mean for the SMB-DIN2?

The IP66 rating indicates that the SMB-DIN2 enclosure provides complete protection against dust ingress (the first “6”) and protection against powerful water jets from any direction (the second “6”). This makes the enclosure suitable for installation in dusty environments such as plant rooms or warehouses, or locations where moisture may be present such as riser cupboards or areas that are regularly cleaned with water. The IP66 rating ensures the addressable interface modules housed inside are protected from environmental contamination that could affect their operation or reliability, making it ideal for demanding indoor environments.

When would I choose SMB-DIN2 instead of multiple SMB-DIN1 boxes?

The SMB-DIN2 should be chosen when multiple interface modules need to be installed at the same location. Using a single SMB-DIN2 instead of two or more SMB-DIN1 boxes offers several advantages: reduced installation time and cost (one enclosure to mount instead of multiple), neater appearance with consolidated modules, simplified cable management with all interfaces in one location, and reduced material costs. The SMB-DIN2 is particularly appropriate for plant rooms, boiler houses, or equipment cupboards where several monitoring and control functions converge, such as combining conventional zone monitoring, relay outputs for equipment control, input monitoring from ancillary devices, and loop isolation all in one protected enclosure.

Can the SMB-DIN2 be used outdoors?

While the SMB-DIN2 has an IP66 rating providing excellent protection against dust and water jets, it is specified for indoor use only according to the technical specifications. The polystyrene construction and temperature rating are optimized for internal environments such as plant rooms, boiler houses, equipment cupboards, and riser shafts. For outdoor installations, consideration should be given to UV resistance, wider temperature ranges, and compliance with local electrical installation standards which may require different enclosure specifications, materials, and IP ratings specifically certified for external applications and direct weather exposure.

What is the maximum operating temperature for the SMB-DIN2?

The SMB-DIN2 is rated for operating temperatures up to +70°C, which makes it suitable for installation in warm environments such as boiler rooms, plant rooms, or areas containing heat-generating equipment. This temperature rating ensures both the enclosure and the housed A-Series modules (which are typically rated to +55°C operating temperature) can function reliably even in elevated ambient conditions. However, always ensure the specific modules installed do not exceed their individual temperature ratings even if the enclosure itself can withstand higher temperatures. Adequate ventilation should be considered for locations with sustained high temperatures.

How is the SMB-DIN2 mounted?

The SMB-DIN2 features flush surface mounting, allowing it to be fixed directly to walls or other flat surfaces using appropriate fixings for the substrate (screws for masonry, plasterboard fixings for cavity walls, etc.). The larger 180 × 110mm footprint provides a stable mounting profile with multiple fixing points for secure installation. The enclosure should be positioned to allow easy access for wiring connections to the modules inside while keeping cable runs as short as possible to the equipment being interfaced. Mounting locations should consider accessibility for future maintenance and testing while protecting the enclosure from physical damage. The increased depth (90mm) requires adequate clearance behind the mounting surface.

What typical module combinations would be installed in an SMB-DIN2?

The SMB-DIN2’s four single-width or two double-width module capacity enables various practical combinations. Common configurations include: two A50E-2 relay modules for dual equipment control; one A70E-2 conventional zone interface plus two A45E-2 input modules for zone monitoring with additional inputs; one A50E-2 relay plus one A60E isolator plus two A45E-2 inputs for comprehensive monitoring and control; or four A45E-2 input modules for extensive input monitoring from a single location. The flexibility allows system designers to consolidate related interface functions in a single protected enclosure, reducing installation complexity while maintaining organized, accessible module arrangements.