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NEX7250 Zone 2 Hazardous Area Alarm Annunciator

NEX7250 Zone 2 Hazardous Area Alarm Annunciator

Product catalog summary

Overview
The NEX7250 Alarm Annunciator is designed for Zone 2 hazardous areas, adhering to Type “n” standards and certified under the ATEX Directive 100a in accordance with EN50021:1999. It features ultra-bright LED illumination in six colors and a multi-redundant design to prevent single-point failures. The system is fully field programmable for standard ISA sequences and offers options for RS485 serial interface and repeat relay per channel.

Design and Construction
The system is based on the Series 725 Alarm Annunciator, available in three window sizes: 30 x 30mm, 30 x 60mm, or 60 x 60mm. It uses ASIC technology for improved reliability and is available in wall or panel mounting versions, both sealed to IP54 with a hinged plexiglass viewing window.

Technical Specifications

Certification: Self-certified to EN50021:1999, Group II, Category 3G, EEx nA (L) IIC T4.
Location: Suitable for Zone 2, Gas Groups IIC, IIB, or IIA, with a temperature class up to T4.
Alarm Channels: Available from 2 to 120 channels with three window size options.
Material: Standard steel enclosures or bespoke panel mounted versions, with stainless steel options available.
Connections: Wired to terminals suitable for cable sizes up to 2.5mm².
Outputs: Dual common alarm and dual horn relays standard, with individual repeat relays and RS485 interface options.
Environment: Operating temperature 0 to 50ºC, storage temperature –20 to 80ºC, humidity 0-95% RH non-condensing.
Supply: 85-264VAC or 24VDC.
Protection: IP54.

Additional Features
Remote pushbuttons, certified sounders, and beacons can be integrated into the system. The hinged door allows easy access for configuration, wiring, and commissioning.

Customization
Systems can be tailored to meet specific customer requirements, with detailed specifications available in the Series 725 datasheet.

Contact Information
RTK Instruments Limited, St James Business Park, Knaresborough, North Yorkshire, England. Telephone: +44 (0)1423 580500, Email: [email protected]

Catalog excerpts

NEX7250 Zone 2 Hazardous Area Alarm Annunciator-1

hazardous areasCertified to the ATEX Directive100a in accordance with EN50021:1999 Ultra-bright LED illumination as standardin six colours Multi-redundant design(ensuring no single point can cause failure)Fully field programmable for allstandardISA sequences plus a range of optionsOptions for RS485 serialinterface and repeat relay per channel >

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NEX7250 Zone 2 Hazardous Area Alarm Annunciator-2

Detailed Specification Please refer to the Series 725 datasheet for full details on the Alarm Annunciator specification. Specials The details shown below are typical arrangements only, systems can be designed and manufactured to each customers exact requirements. Environment Operating Temperature:0 to 50ҺC Storage Temperature:20 to 80ֺC Humidity:0-95% RH, non condensing Supply 85-264VAC or 24VDC Protection IP54 > Certification Self certified to EN50021:1999 under the ATEX Directive 100aGroup II, Category 3G, EEx nA (L) IIC T4(Ta -20C to +50ںC) Location Zone 2. Gas Groups IIC, IIB or IIA. Temp...

Open the catalog to page 2

NEX7250 Zone 2 Hazardous Area Alarm Annunciator

NEX7250 Zone 2 Hazardous Area Alarm Annunciator

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