Author
Through a professional technical team, we provide customers with targeted equipment selection recommendations and comprehensive after-sales services, winning the trust and recognition of customers.
Industrial control systems continue to demand more mounting space. A typical cabinet may now contain PLC hardware, variable frequency drives, safety controllers, circuit protection, industrial networking equipment, power supplies, terminal blocks, and thermal management components.
As component density increases, selecting an enclosure becomes more complex than matching an external width, height, and depth. Engineers must determine whether the mounting panel can be installed safely, how power and signal cables will be separated, whether technicians can reach critical terminals, and how future equipment will fit without rebuilding the cabinet.
On many retrofit projects, a costly problem appears only after delivery: the enclosure fits the allocated floor space, but the populated mounting panel cannot be inserted easily or the field cables lack sufficient entry and bending space.
These requirements often lead to a double door enclosure. Compared with a wide single-door cabinet, two narrower doors reduce the required swing area while maintaining broad access to the internal equipment.
The VX Hybrid Double Door Carbon Steel Enclosure is intended for applications that need a wide control cabinet enclosure with the configuration options associated with a modular enclosure system. Its engineering value is best understood by examining the complete cabinet lifecycle—from layout and panel assembly to transportation, commissioning, and field maintenance.
The enclosure is the mechanical foundation of an automation system. A poor cabinet layout creates problems for every team that works on the project, including electrical designers, panel builders, commissioning engineers, purchasing teams, and maintenance technicians.
Wiring complexity
Modern machines generate a large volume of power, control, communication, and sensor wiring. These conductors cannot be routed simply according to available space. Engineers must consider cable bend radius, electromagnetic compatibility, heat sources, service loops, voltage separation, and access to termination points.
A wider industrial electrical enclosure gives panel designers more freedom to organize cable routes. Variable frequency drives and power distribution components can occupy one section, while PLCs, relays, network switches, and low-voltage control devices are installed in another.
Consider a packaging line with several servo axes, safety circuits, remote I/O stations, and vision equipment. The control cabinet may receive incoming power at one side, motor cables through the base, and Ethernet and sensor cables from overhead trays. Without sufficient width, these cable groups may cross repeatedly or compete for the same wiring ducts. A properly sized double door enclosure allows each route to be planned before production begins.
Component density and thermal spacing
Smaller electrical components do not necessarily produce a smaller cabinet. Drives, power supplies, and contactors still require ventilation space. Terminals need room for conductor entry, and technicians need access for torque checks and component replacement.
High component density can also create local hot spots. A cabinet may have acceptable total heat dissipation while still exposing temperature-sensitive control equipment to heat generated by drives or transformers. A larger mounting surface makes it easier to separate these thermal zones and position cooling equipment effectively.
Installation efficiency
Enclosure design directly affects workshop labor. Panel insertion, drilling, rail installation, cable routing, door modification, and accessory assembly can consume many hours when access is restricted.
For a panel builder producing several similar cabinets, even a small reduction in assembly time per unit can be significant. Standard mounting components and repeatable accessory locations also make it easier to reuse drawings, CNC machining data, wiring templates, and inspection procedures.
Maintenance accessibility
Maintenance teams experience the consequences of enclosure selection long after the original project has been completed. A cabinet that looks compact on a layout drawing may be difficult to troubleshoot when the machine is running and access is limited.
Two doors provide broad access without requiring one oversized door to swing into an aisle. If the central front structure can be removed when major work is required, technicians can replace a large component or remove the mounting panel without dismantling unrelated equipment.
For additional cabinet-planning principles, see the [Enclosure Selection Guide].
Double-door cabinets solve the problem of excessive door width, but traditional designs can introduce other mechanical and installation constraints.
Time-consuming site assembly
One method of creating a wide cabinet is to join two smaller enclosures. This can offer configuration flexibility, but it also creates additional work. The cabinets must be aligned, connected, sealed, grounded, and mechanically stabilized. Base or plinth sections may also need to be joined and leveled.
This work becomes more difficult when installation takes place beside operating machinery. The site team may have limited lifting equipment, poor access to the rear of the cabinet, and only a short shutdown window.
Using a single-footprint double door enclosure avoids the field work associated with creating the main cabinet width through baying. Assembly, wiring, and inspection can take place in the panel shop before shipment, reducing the number of critical installation tasks left for the site team.
Restricted internal width
A fixed center post can interfere with a full-width mounting panel or limit access to equipment positioned near the center of the enclosure. Designers may be forced to use separate mounting panels even when the electrical design would be clearer on one continuous surface.
This matters in applications such as conveyor control, where motor starters or drives may be arranged in repeated functional groups. Dividing the equipment between two unrelated mounting areas can complicate wire routing and device identification.
The center structure may also obstruct installation. A mounting panel can fit the internal dimensions of the cabinet but still be difficult to move through the front opening.
Limited configuration options
Heavy-duty unibody cabinets provide structural strength but may offer fewer internal mounting levels than a modular enclosure system. Panel builders may need locally fabricated brackets for cable supports, partial panels, door-mounted equipment, or thermal management components.
Custom parts can solve an immediate mechanical problem, but they increase drawing work, purchasing complexity, and replacement risk. If the same machine is built again several years later, the original fabricated parts may no longer be available.
Accessory compatibility
Accessories should be selected as part of the enclosure, not after the cabinet has been ordered. Base/plinth systems, cable rails, grounding parts, door stops, lighting, document pockets, partial mounting panels, and cooling products must match the cabinet dimensions and frame.
When accessories come from an established system, panel builders can create repeatable assemblies instead of adapting generic hardware for each project. Review compatible options on the [Accessories Page].
The VX Hybrid Double Door Carbon Steel Enclosure combines a wide, single-cabinet footprint with the internal configuration principles of the VX25 platform. For engineers and integrators, the main benefit is a more direct assembly workflow.
Hybrid frame concept
One wide equipment space replaces the need to join two separate cabinets to form the main installation area. The frame also supports modular interior installation and the use of compatible VX25 accessories.
This arrangement is useful when a project needs a full-width mounting surface but does not require a bayed enclosure lineup. A system integrator can arrange power, automation, safety, and communication equipment across one coordinated panel while maintaining a structured mechanical installation.
For model-specific dimensions and supply details, refer to the [Product Page].
Mounting-panel installation
A full-width mounting panel allows functional groups to be arranged according to the electrical design rather than the number of enclosure doors.
Removing the center mullion opens the front of the cabinet during panel insertion or major service work. This can make a practical difference when a populated mounting panel is installed with a lifting device. Technicians can guide the panel into position without attempting to pass large components around a permanent center obstruction.
The mounting panel can also be positioned at different depths. A panel builder may set it farther back to accommodate deep door-mounted controls, or bring it forward when easier terminal access is more important. The correct position depends on device depth, cable volume, thermal clearance, and the required space behind the panel.
Workshop and site workflow
A system integrator can complete most mechanical preparation under workshop conditions. Machining, accessory installation, population, wiring, and inspection can all be completed before delivery.
Once on site, the installation team can focus on positioning, anchoring, field cable termination, and commissioning. Reducing enclosure assembly at the destination is particularly valuable for retrofit projects, where production shutdowns are closely controlled.
For example, a water treatment upgrade may require an existing control cabinet to be replaced during a weekend outage. A preassembled control cabinet enclosure reduces the number of mechanical tasks that must be performed beside operating pumps and pipework.
Standardized accessories
VX25 accessory compatibility supports the use of established interior rails, base/plinth components, mounting hardware, and door accessories. This can reduce custom fabrication and improve consistency across multiple cabinets.
For OEMs building machine variants, standardization is especially useful. The main enclosure platform can remain consistent while mounting rails, partial panels, and cable-routing components are adjusted for each machine configuration.
The product family should not be selected on features alone. Start with the electrical design, installation environment, and expected maintenance conditions.
Enclosure dimensions
External dimensions do not represent usable mounting space. Verify the following for the exact model:
Deep devices such as variable frequency drives, molded-case circuit breakers, busbar assemblies, and disconnect mechanisms may determine the required enclosure depth.
Also check the transport route. An enclosure that fits the installation area may not pass through the available doors, elevators, or machine openings after it has been populated.
Environmental protection
Published Rittal technical data for the carbon steel variants identifies IP66 and NEMA 4 protection classifications. These classifications provide an important starting point for selection, but they should not be interpreted as automatic ratings for every completed control cabinet.
Cutouts, cable entries, cooling units, operator devices, seals, and field modifications all affect the integrity of the finished assembly. Engineers should select appropriately rated components and follow the relevant sealing, installation, and inspection requirements.
Environmental review should include:
For strongly corrosive environments, a stainless steel NEMA 4X enclosure may be more appropriate than a carbon steel model.
Mounting space and weight distribution
Prepare a scaled layout before ordering the enclosure. Include wiring ducts, terminals, grounding points, heat-producing equipment, and working clearances.
Large drives, transformers, or busbar systems require attention to weight distribution. The mounting panel, enclosure frame, base, lifting method, and floor anchors must be considered as one mechanical system.
Panel builders should also review the populated panel installation method. Lifting points, panel angle, shop ceiling height, and available handling equipment can be just as important as the panel dimensions.
Cable management
Identify where each cable group enters the enclosure before finalizing the component layout. Power, motor, control, safety, and network cables may require separate routes.
A common field problem occurs when bottom-entry motor cables are planned after the drive layout has been completed. The cables may then require tight bends or cross low-voltage wiring ducts. Reserving cable-entry and clamping space early prevents this type of rework.
Accessory compatibility
Create the accessory list at the same time as the enclosure bill of materials. Confirm compatibility by product number, width, height, and depth.
Potential accessories include:
Future expansion
Reserve space for realistic additions such as remote I/O, network switches, power supplies, monitoring devices, or additional motor circuits.
Expansion planning must include thermal capacity and cable fill. An unused section of mounting panel is not useful if the wiring ducts are already full or the cooling system has no remaining capacity.
The VX Hybrid Double Door Carbon Steel Enclosure is relevant where a project requires a large continuous mounting area, wide service access, and industrial environmental protection.
An enclosure part number does not define a complete cabinet solution. Incorrect rails, incompatible base components, unsuitable cooling equipment, or missing installation hardware can delay panel production even when the main cabinet is available.
A supplier with enclosure experience can help review cabinet dimensions, mounting requirements, environmental conditions, and the accessory list before an order is released. This is especially valuable for projects involving multiple cabinet sizes, repeated machine builds, or region-specific technical requirements.
Suwiauto supplies Rittal enclosure solutions and supports customers with product selection, accessory matching, technical consultation, and project coordination. The objective is to confirm that the selected Rittal enclosure and supporting components form a workable system—not simply to supply the cabinet body.
Early technical review can also help purchasing teams avoid fragmented orders and part-number errors. Resolving a dimensional or compatibility issue before production is considerably less expensive than correcting it during assembly or commissioning.
Q1. When should I select a double door enclosure instead of two bayed cabinets?
A: Choose a single double-door cabinet when the system benefits from one continuous mounting panel, simplified transport, and less site assembly. Bayed cabinets may be preferable when the lineup must be extended, separated into transport sections, or divided into independent functional compartments.
Q2. Does an IP66 or NEMA 4 enclosure automatically give the finished control cabinet the same protection?
A: Not necessarily. The published classification relates to the enclosure in its specified configuration. Cable glands, cutouts, operator devices, cooling units, seals, and assembly practices all influence the protection achieved by the completed cabinet.
Q3. How much expansion space should be reserved?
A: There is no universal percentage. The allowance should reflect the machine roadmap, likely I/O growth, cable-duct capacity, heat load, and available power. For repeat-build equipment, reviewing previous project revisions often provides a better basis than applying an arbitrary spare-space figure.
Q4. What should be checked before ordering VX25 accessories?
A: Confirm the enclosure product number and its width, height, and depth. Then verify the mounting location, mechanical load, required hardware, and whether the accessory affects other components. Door accessories, rails, partial panels, base/plinth parts, and cooling equipment should be reviewed as part of the complete layout.
Planning a control cabinet, machine retrofit, or multi-enclosure automation project? Send Suwiauto your equipment layout, bill of materials, installation environment, cable-entry requirements, and preferred enclosure dimensions.
Our team can help identify a suitable Rittal model, cross-check accessory compatibility, and prepare a coordinated quotation for the enclosure and required system components. Providing these project details at the inquiry stage helps reduce specification errors, missing hardware, and procurement delays.
Submit your requirements through the [Product Page], review available components on the [Accessories Page], or use the [Enclosure Selection Guide] to prepare the technical information needed for an accurate quotation.
Selecting a double door enclosure requires more than comparing external dimensions and material specifications. The enclosure affects panel layout, workshop productivity, transportation, field installation, environmental protection, expansion capacity, and maintenance access throughout the equipment lifecycle.
The VX Hybrid Double Door Carbon Steel Enclosure combines a wide single-cabinet footprint, full-width mounting capability, removable center mullion, modular interior configuration, and VX25 accessory compatibility. For applications suited to carbon steel construction and the published protection classifications, it offers a practical route to a more organized and serviceable cabinet design.
The right industrial control cabinet enclosure is not simply the largest cabinet that fits the available floor space. It is the one that supports safe assembly, clear cable routing, efficient commissioning, and manageable maintenance for the full operating life of the automation system.