Category: ATEX Drives

ATEX Control System (Used With Drives)

The CS320 ATEX controller is an explosion-protected control system designed for use with Marantec ATEX door operators. It ensures safe control and monitoring of industrial door drives in hazardous environments.

The system includes safety barriers, motor protection, and advanced control electronics for reliable operation.

(The Company reserves the right to amend product specifications and information without notice.)

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ATEX Industrial Motors

ATEX industrial motors are specially designed explosion-proof electric motors engineered for safe operation in hazardous environments where flammable gases, vapours, or combustible dust may be present. These motors comply with strict ATEX directives and are constructed to prevent ignition sources such as sparks, arcs, or excessive heat.

Used extensively in industrial door automation systems, including roller shutter and sectional door drives, these motors provide reliable performance, high torque, and long service life under demanding conditions.

ATEX motors are a critical component in industries such as oil and gas, chemical processing, mining, food production, and pharmaceuticals, where safety and compliance are essential.

(The Company reserves the right to amend product specifications and information without notice.)

Downloadable Resources

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ATEX Junction Box

Explosion-protected terminal/junction box designed for use in hazardous (Ex) environments. 

It is built according to the “increased safety” protection concept (Ex-e) and is used to:

  • Safely distribute electrical connections
  • Interface field devices (limit switches, motors, sensors)
  • Integrate with industrial door control systems in hazardous zones

Typically used with:

  • MFZ Ovitor industrial door drives
  • Explosion-proof control panels
  • ATEX-compliant installations (e.g. chemical plants, grain silos)

Key Features

  • Certified for hazardous areas (gas & dust zones)
  • Ex-e (increased safety) design prevents sparks/arcs
  • Equipped with 6 cable glands (Verschraubungen)
  • Front-access enclosure (2017 front layout version)
  • Robust industrial housing (impact & corrosion resistant)
  • Suitable for integration with Ex-rated motor/control systems

Technical Specifications (Typical / Equivalent Ex-e Box Class)

Specification Details
Type Ex-e terminal box / junction box
Protection concept Ex-e (Increased Safety)
ATEX classification Ex II (2)G / Ex II (2)D (typical)
Zones Gas Zone 1 & 2, Dust Zone 21 & 22
Cable entries 6 × cable glands
Mounting Surface-mounted (front access)
Ingress protection Typically IP65–IP66
Material Plastic / GRP / coated metal (variant dependent)
Operating voltage Up to ~690 V (typical for Ex-e terminals)
Temperature class Commonly T6 (variant dependent)
Ambient temperature ~−20 °C to +40 °C (typical)

Design & Construction

  • Flameproof integrity is not required (unlike Ex-d), but:
    • No arcs, sparks, or hot surfaces allowed
  • Internal terminal blocks are:
    • Securely fixed
    • Designed for vibration resistance
  • Cable glands:
    • Maintain sealing and explosion protection rating
  • Enclosure:
    • Often halogen-free, UV-resistant, and corrosion-resistant

Function in MFZ Ovitor Systems

Within an MFZ Ovitor installation, this Ex-e terminal box is typically used to:

  • Connect:
    • Motor power cables
    • Limit switches
    • Safety devices (edges, sensors)
  • Provide a safe interface between hazardous zone equipment and control units
  • Maintain compliance with ATEX/IECEx requirements

Safety & Compliance

  • Must comply with:
    • ATEX Directive (2014/34/EU)
    • IECEx certification schemes
  • Installation requirements:
    • By certified electricians only
    • Correct gland sealing is critical
  • Designed to prevent:
    • Electrical arcs
    • Excess heat buildup
    • Ignition of explosive atmospheres
(The Company reserves the right to amend product specifications and information without notice.)

ATEX Key Switch Open-Close

The ATEX Key Switch is a:

  • Explosion-proof industrial control station
  • Designed for manual control of doors, motors, or machinery
  • Used in ATEX hazardous environments


Functional Description

Core Function

  • Provides manual control input (momentary switching )
  • Sends electrical signal to:
    • Door controller (e.g. Marantec ATEX CS320 series)
    • Motor control system
    • Industrial automation panel

ATEX Explosion Protection

Certification Marking

From Marantec ATEX documentation:

  • Ex II 2G Ex ed IIC T6
  • Ex II 2D Ex tD A21 IP66 T80°C

Meaning (decoded)

  • II 2G / 2D → Suitable for Zone 1 & 2 (gas) and Zone 21 & 22 (dust)
  • Ex ed → Combination of:
    • Ex e (increased safety)
    • Ex d (flameproof parts)
  • IIC → Highest gas group (hydrogen, acetylene)
  • T6 → Max surface temp ≤ 85°C
  • IP66 → Dust-tight + strong water jet protection

 This is high-level industrial explosion protection


Construction & Materials

Housing

  • Glass-fibre reinforced polyester resin
  • Anti-static, impact-resistant

Sealing

  • PU foam gasket (industrial sealing)

Design

  • Surface-mounted enclosure
  • Front push-button actuator
  • Industrial cable entry (ATEX glands)

Electrical Specifications

Rated Electrical Values

  • Voltage: up to 400V AC
  • Switching current: 6 A

Contact Type

  • Typically:
    • NO (Normally Open) or
    • NC (Normally Closed)
  • Configurable depending on application

Wiring

  • Screw terminals inside enclosure
  • ATEX-certified cable glands

Physical Specifications

From MFZ ATEX datasheet:

  • Height: 93 mm
  • Width: 80 mm
  • Depth: 72 mm
  • Weight: ~400 g

Compact but rugged industrial design


Environmental Specifications

  • Temperature range: −20°C to +40°C
  • Protection class: IP66
  • Resistant to:
    • Dust
    • Moisture
    • Chemicals
    • Industrial vibration

Typical Applications

Used in explosion-risk environments, such as:

Industries

  • Oil & gas plants
  • Chemical processing
  • Grain silos (dust explosion risk)
  • Paint and solvent facilities
  • Pharmaceutical production

Door & Automation Use

  • ATEX industrial doors
  • Roller shutters in hazardous zones
  • Explosion-proof motor control stations

 Often paired with:

  • ATEX motors
  • ATEX control panels
  • Marantec explosion-proof operators

System Integration

Typical Control Chain

Key Switch  → Controller → Motor → Door

The EX Taster acts as:

  • Primary manual input device
  • Safety-compliant human interface in hazardous zones

Critical Engineering Notes

Not a Standard Control Station

You cannot replace it with a normal switch because:

  • Must prevent sparks
  • Must limit surface temperature
  • Must meet ATEX certification

Installation Requirements

  • Must use:
    • ATEX cable glands
    • Proper grounding (anti-static protection)
  • Installed by certified personnel

Contact Protection

  • Contacts are designed to:
    • Avoid arcing
    • Maintain safe switching in explosive atmospheres

Example Technical Summary

  • Zones: 1, 2, 21, 22
  • Voltage: up to 400V AC
  • Current: 6 A
  • Protection: IP66
  • Temp class: T6
  • Housing: Glass-fibre reinforced polyester
  • Size: 93 × 80 × 72 mm
(The Company reserves the right to amend product specifications and information without notice.)

Atex Photocell

The Atex rated Reflex Photocell 24V is an explosion-proof reflective photoelectric sensor designed for safe operation in hazardous environments. Built with intrinsically safe “Ex ia” protection, it ensures that electrical energy levels remain low enough to prevent ignition, even under fault conditions.

This reflective light barrier system consists of a transmitter/receiver unit and reflector, allowing reliable detection of objects or interruptions without requiring a separate receiver unit. The front-mounted configuration simplifies installation and alignment in industrial door applications.

Key Features

  • 24 V AC/DC operation (industry standard)
  • Retro-reflective design (single-sided wiring)
  • Infrared safety beam (invisible detection field)
  • Automatic stop/reverse function when beam is broken
  • Compact housing with alignment LEDs
  • Weather-resistant for outdoor use
  • Compatible with most gate/door controllers

Technical Specifications

(Consolidated from Marantec-type units + verified equivalents)

Specification Details
Type Reflex (retro-reflective) photocell
Power supply 12–24 V AC/DC (nominal 24 V)
Operating principle Infrared beam + reflector
Range Typically 8–15 m (depending on reflector)
Output Relay (NO/NC contacts)
Response time <10–20 ms
Current consumption ~30–50 mA
Ingress protection IP45–IP67 (model dependent)
Operating temperature ~−20 °C to +60 °C
Mounting Surface / wall-mounted
Wiring 2–4 wire depending on relay setup

How It Works

  • The photocell emits a polarized infrared beam
  • The beam reflects off a mirror/reflector
  • The receiver (same unit) monitors the returned signal
  • If the beam is interrupted → system triggers safety stop/reverse

This is different from dual-beam systems, which require wiring on both sides.


Typical Applications

  • Automated garage doors
  • Industrial roller shutter doors
  • Sliding & swing gates
  • Access control barriers

In systems like Marantec, these are used to:

  • Prevent closing on vehicles or people
  • Meet safety compliance requirements

Safety Function

  • Creates an invisible safety curtain across the opening
  • If interrupted:
    • Door stops immediately
    • Or reverses (depending on controller logic)

This is considered a primary safety device, but often used alongside:

  • Safety edges
  • Loop detectors

Reflex vs Standard Photocells

Type Wiring Setup Use Case
Reflex (this product) One side only Easy Retrofit / long driveways
Through-beam (TX/RX) Both sides More wiring Higher precision

The sensor is commonly used in ATEX-certified door systems to provide safety monitoring, obstruction detection, and automated control functions. It integrates seamlessly with explosion-proof control panels and operators from MFZOvitor / Marantec.

(The Company reserves the right to amend product specifications and information without notice.)

ATEX Push Button Station

Explosion-proof single push button control device designed for use in hazardous environments where explosive gasses or dust may be present. It is specifically engineered for integration with ATEX-certified industrial door systems such as roller shutter and sectional door operators.

This front-mounted push button station provides safe and reliable manual control of door systems within hazardous zones. The robust enclosure and ATEX-compliant components ensure safe operation without risk of ignition.

The unit is commonly used in combination with Marantec explosion-proof drives and control systems, forming part of a complete ATEX-certified door automation solution.

(The Company reserves the right to amend product specifications and information without notice.)
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