Ex PCs / Workstations

Ex measuring- and control devices

Pressurized enclosure systems (Ex p)

F830 F840 F850-SYST F850S F850U F860S F870S OEM SR852 SR853

Pressurized enclosure systems (Ex p)

[Pressurization systems for use in hazardous locations]

Using standard automation components spends the user considerable advantages:
  • Easy installation and implementing
  • Hard- and software compatibility and -flexibility
  • Verified function modules, All from one source
  • Standdard configuration programming
  • Standard user interfaces
  • Standard service

In many production facilities occur explosive gas or dust atmospheres were standard devices are not suitable.

In most cases special Ex- hardware must be used, followed with high acquisition and life time costs.

The pressurized enclosure technology represents in most causes an interesting alternative to use verified "Non Ex- " systems even in hazardous areas.

Pressurized enclosure systems (Ex p): Concept

HMI The use of pressurized enclosures provides the operation of non Explosion protected devices in hazardous areas of Zone 1, 21, 2 and 22. The protection type pressurization is based on the principle of maintaining a constant pressure using air or a protective gas to prevent an explosive mixture forming near the apparatus inside the pressurized enclosure.

This is achieved by placing and operating the non Ex- devices inside of an Ex p- housing. This housing has a small but constant overpressure of air or protective gas and prevents the infiltration of combustible gases or dusts.

Gönnheimer - Global purge solutions

Gönnheimer offers safe and economical Ex- concepts to intalling electrical equipment in hazardous locations. Europe, North America or Asia - we serve with universal purge solutions for most applications.


F870S Pressurized enclosure system - the new reference

  • ATEX certificate: BVS 10 ATEX E 112 according to EN 60079 and EN 61241
  • IECEx certificate: IECEx BVS 10.0095 according to IEC 60079 and IEC 61241
  • Functional safety SIL 2 according to IEC 61508
  • Wide range flow measurement, with dynamic range 1:50
  • Wide range power supply: 100 V  240 VAC or 24VDC
  • Ethernet interface (Ex e) for connection to supervisory control system

Purge control unit FS850S for standard use in ATEX- Zones 1 and 21

  • PID- Pressure control while operation and purging phase
  • Detecting of the real air flow through the cabinet
  • New: Certification according to EN 60079-2: BVS 06 ATEX E 088
  • Ex- prove: II 2 G/D, Ex e mb [ib] [px] IIC T6
  • ATEX- Certification: BVS 06 ATEX S 088

Purge control unit FS860S in combination of big cabinets in ATEX- Zones 1 and 21

  • Compact purging system of 2 inch air flow hardware
  • Very low purging time via big air flow
  • New: Certification according to EN 60079-2: BVS 06 ATEX E 088
  • Ex- prove: II 2 G/D, Ex e mb [ib] [px] IIC T6
  • ATEX- Certification: BVS 06 ATEX S 088

Purge control unit FS830 for standard use in ATEX- Zones 2 and 22

  • F830 Ex pz / pD- system, can be integrated direct into the cabinet wall
  • flexible system configuration with separate installation of inlet valve, outlet valve and control unit
  • automatical pre purging programmable, contact for solenoid valve
  • ATEX- Certification: TÜV 03 ATEX 2095X

Purge control unit FS840 for standard use in ATEX- Zones 2 and 22

  • Compact system, Monting direct in hazardous area (Zone 2 bzw. 22) or inside of Ex pz- housing
  • Automatic prepurging programmable
  • Terminals for solenoid valve
  • Certified to:
    • EN 50021 (nP),
    • IEC 60079 - 2 (pz),
  • ATEX- Certification: TÜV 03 ATEX 2095X

Purge control unit FS850U according to NEC 500: Class I, Division I

  • Compact system, mounting in hazardous locations (Class I, Division I)
  • Based on NFPA 496 : 2003
  • Protection class: Class I, Division I, Groups BCD, Type X

Pressurization systems accessories

[Intelligent designed relays for safe disconnetion purpose in hazardous locations]


Disconnector unit SR852

  • Compact design
  • Up to 16 Ex e contacts
  • According to safety standard EN 954-1, Category 3

Power relay SR853.8

  • Compact design
  • Four galvanically separated contacts
  • Switches 400V, 16 A, 4000 VA
  • According to EN 954-1, cat. 3
  last modified: 07.12.2017