Ex p complete system for Ex p cabinets up to 1200 l - Zones 2 and 22 - Mounted on the roof or lateral enclosure wall

Oct 25, 2026

Upload by jay

Ex p complete system for Ex p control cabinets up to 1200 l, designed for hazardous area zones 2 and 22. The system supports all-round installation on the roof or lateral enclosure wall, with compact construction and simple mounting. An Ex p controller (DC 24 V or AC 90–253 V) enables safe monitoring and cost-effective continuous operation near the pressure switch-off threshold. Modular components adapt purge times and purge pressures to current requirements, while a glass fibre reinforced polyester enclosure withstands adverse environmental conditions and offers optional protective collars.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages3

Reading Time8 min

AccessFree to download

Device Overview

Key Features

Explosion Protection

Application Range (Zones)

Certificates and Declarations

Technical Data

Auxiliary Power

Device Specific Data

Ambient and Mechanical Data

Mounting / Installation

Dimensional Drawings and Notes

Ex p solutions Ex p complete system for Ex p cabinets up to 1200 l for Zones 2 and 22 7621/11-1020-1010 Art. No. 276331 | | | • All-round Ex p system for Ex p cabinets from 10 to 4000 litres
• Zones 2 and 22
• Mounted on the roof or lateral enclosure wall
• Ex p controller in DC 24 V or AC 90–253 V
• Compact construction design, simple mounting
• Ex p parameters are adjusted using the display, regardless of language | | --- | --- | --- | |
MY R. STAHL 8621A
The Ex p system 8621 is ideal for safe control and monitoring of Ex p control cabinets in a range of sizes. The highly accurate pressure sensors, which are redundantly present for the Ex Zone 1 version, enable operation near the pressure switch-off threshold. This reduces the required leakage quantities to a minimum and guarantees very cost-effective continuous operation.
The concept with a modular system component structure enables purge times and purge pressures to be adapted to meet current requirements. To do so, only the number of purge gas outlets (Ex p pressure monitors) needs to be changed in order to drastically reduce the purge time or purge pressure, if the same Ex p controller is used.
To guarantee that adverse environmental conditions can be withstood, our tried-and-tested glass fibre reinforced polyester has been selected as the enclosure material. Additionally, optional suitable protective collars are available as protection against heavy rainfall.
A device as simple as it is effective (Ex p vortex air cooler) is available for cooling Ex p cabinets. In this respect, too, the cooling power is regulated solely by the number of structurally identical devices that are installed.
Technical Data | | | | Explosion Protection | | | | Application range (zones) | 2, 22 | | | IECEx gas certificate | IECEx TUR 19.0033 X | | | IECEx gas explosion protection | Ex ec mc ia [pzc Gc][ia Ga] IIC T4 Gc | | | IECEx dust certificate | IECEx TUR 19.0033 X | | | IECEx dust explosion protection | Ex tc [pzc Dc][ia Da] IIIC T80 °C Dc | | | ATEX gas certificate | TUV 19 ATEX 8339 X | | | ATEX gas explosion protection | E II 3 (1) G Ex ec mc ia [pzc Gc][ia Ga] IIC T4 Gc | | | ATEX dust certificate | TUV 19 ATEX 8339 X | | | ATEX dust explosion protection | E II 3 (1) D Ex tc [pzc Dc][ia Da] IIIC T80 °C Dc | | | Certificates | ATEX (TUR), Brazil (ULB), China (CQST), IECEx (TUR), India (PESO), Korea (KTL) | | | Declaration of conformity | ATEX (EUK) | | | Further information | See the operating instructions for the Ex p system | | | Auxiliary Power | | | | Aux. power rated oper. voltage | DC 24 V (+20% ... 15%) | | | Note | Rated current depends on the Ex p purge valve used | | | Auxiliary power connection | Screw connector | | | Device Specific Data | | | | Min. pressure range | 0 mbar | | | Max. pressure range | 25 mbar | | 2026-08-08 R. STAHL Schaltgeräte GmbH | Am Bahnhof 30 | 74638 WALDENBURG 1/3 V 0.112 EN Tel. +49 7942 943 1700 | +49 7942 943 1777 | Email: [sales.de@r-stahl.com | r-stahl.com](sales.de@r-stahl.com | r-stahl.com) Ex p solutions Ex p complete system for Ex p cabinets up to 1200 l for Zones 2 and 22 7621/11-1020-1010 Art. No. 276331 | Device Specific Data | | | --- | --- | | Pressure range | 0 – 25 mbar | | Max. power dissipation | 1.5 W plus Ex p purge valve | | Ex p system | consisting of | | Ex p controller | 1 x type 7622/11-1020-1000 | | Ex p controller enable cont. | 1 potential-free contact | | Ex p pressure monitor | 1 x type 8622/31-1001-0000 | | Ex p pressure monitor opening pressure | 3.5 mbar | | Ex p purging valve | 1 x type 8622/21-1020-0000, Brass | | Purging air nozzle | 3 mm | | Ex p pressure reducer | 1 x size 2, Die-cast zinc | | Connection thread | 1/4 " | | Back-up fuse | 1 x type 8622/63-0004 | | Nominal value | 500 mA | | Ex p hose set | 1 x type 8622/65-0000 | | Ex p hose set hose length | 3 m | | Purge time range | 0 – 99 min | | MIN setting | 1 mbar | | MAX setting

FAQs

What zones is the Ex p complete system suitable for?

The application range is zones 2 and 22.

How does the system achieve safe control and monitoring near the pressure switch-off threshold?

Highly accurate pressure sensors, available redundantly for the Ex Zone 1 version, enable operation near the pressure switch-off threshold and reduce required leakage quantities.

How can purge time or purge pressure be adapted to changing requirements?

Purge times and purge pressures can be adjusted by changing the number of purge gas outlets (Ex p pressure monitors) while using the same Ex p controller.

Oct 25, 2026

Upload by jay