Overview: The PEX7250 Explosion Proof Alarm Annunciator is designed for hazardous areas, offering programmability and features typically found in safe area annunciators. It is based on the Series 725 Alarm Annunciator and is available in three window sizes: 30x30mm, 30x60mm, and 60x60mm. The system uses ASICs for improved reliability and is housed in a copper-free cast alloy enclosure, suitable for offshore applications.

Specifications: The annunciator is certified for Zone 1 and Zone 2 hazardous areas, with certification EEx d IIB T5 to EN50018. It features ultra-bright LED illumination, a multi-redundant design, and is fully field programmable. It includes dual horn relays, dual group relays, and an RS485 serial interface.

Technical Details: The system is ATEX certified to EN50014:1997 and EN50018:1994, suitable for Gas Groups IIC, IIB, or IIA, with a temperature class up to T5. It supports 1 to 56 alarm points in a single enclosure, with materials including copper-free cast alloy and GRP for control stations and terminal boxes.

Connections and Outputs: The annunciator is wired to terminals for cables up to 2.5mm², with five M20 cable entries standard. It includes test, accept, and reset pushbuttons, with additional controls available. Outputs include dual group and horn relays, with individual repeat relays and RS485 options.

Environmental and Protection: Operating temperature ranges from 0 to 50ºC, with storage from -20 to 80ºC, and humidity from 0-95% RH. It offers IP65 protection, upgradeable to IP66 with appropriate sealing.

Additional Information: The document notes that RTK Instruments can provide alternative configurations and IIC systems upon request. The product comes with a 5-year warranty and is subject to continuous development, with specifications subject to change.