Hazardous Locations in Modern Factory Automation: Why Proportionate Specification Matters

Why It Matters

Aligning motor specifications with the true hazard level reduces capital expenditure and improves system dynamics, giving manufacturers a competitive edge in high‑value, precision industries.

Key Takeaways

• Zone 2/22 motors avoid heavy explosion‑proof housings.
• Over‑specifying for Zone 1 inflates weight, inertia, and cost.
• Targeted safety features meet T4/T130 classes without full flame‑proof design.
• Proper zone selection enables efficient, compliant automation in pharma and food.

Pulse Analysis

The rise of automation in sectors such as pharmaceuticals, food processing, and advanced coatings is blurring the line between traditional hazardous zones and standard production areas. While ATEX and IECEx classifications still dictate safety requirements, many new applications only encounter explosive gases or combustible dust intermittently, placing them in Zone 2 (gas) or Zone 22 (dust). Understanding these nuances is essential for engineers who must balance regulatory compliance with the performance demands of modern servo‑driven machinery.

Designing for Zone 2 and Zone 22 allows manufacturers to forgo the massive, flame‑proof enclosures required for Zone 0/1 equipment. Instead, solutions like Kollmorgen’s AKME series use vacuum‑impregnated windings, T4 temperature limits for gases, and IP67‑rated sealing for dust, delivering the necessary protection without sacrificing torque density or dynamic response. This proportionate approach yields lighter, more agile motors that reduce inertia on moving axes, simplify mechanical integration, and lower overall system cost.

From a business perspective, the shift toward appropriately rated motors translates into tangible savings and faster time‑to‑market. Companies avoid the premium of over‑engineered hardware while still meeting stringent safety standards, a crucial advantage in high‑margin, precision‑focused markets. As regulatory awareness of transient hazards grows, demand for Zone 2/22‑optimized servo solutions is set to expand, prompting OEMs to broaden their product portfolios and offering end users a more efficient path to compliant automation.