Motorola MOTOTRBO™ R7Ex ATEX IIA UHF Full Keypad Two-Way Radio 350–470 MHz 4W (MDH57SDN9RA3AN)

Product Overview

The Motorola MOTOTRBO™ R7Ex ATEX IIA UHF Full Keypad Two-Way Radio (MDH57SDN9RA3AN) is a next-generation intrinsically safe digital radio engineered for mission-critical communication in hazardous environments. Certified to ATEX and IECEx standards, this model is designed for safe use in explosive atmospheres such as oil and gas, chemical processing and industrial manufacturing.

Operating within the 350–470 MHz UHF frequency range, the Motorola R7Ex delivers powerful, clear communication in indoor and complex environments where signal penetration is essential. With a full keypad and advanced display, the radio supports messaging, system navigation and enhanced communication control, making it ideal for both safety and operational efficiency.

Key Features

• ATEX & IECEx Certified: Approved for use in explosive gas environments (Zone 1/2)
• Advanced Audio Performance: Loud, clear communication with intelligent noise suppression
• Full Keypad & Display: Enables messaging, navigation and advanced functionality
• DMR Digital Technology: Enhanced clarity, efficiency and communication performance
• Enhanced Worker Safety: Emergency button, lone worker and man-down functionality
• UHF Optimised Performance: Strong signal penetration in indoor and industrial environments

What Is Included

• Motorola MOTOTRBO™ R7Ex ATEX UHF Radio (Full Keypad)
• ATEX Certified Battery
• ATEX Approved UHF Antenna
• Belt Clip (ATEX Rated)
• Dust Cover
• User Guide

System Capabilities

• Clear Digital Voice: Exceptional clarity in high-noise and hazardous environments
• Text Messaging: Send and receive messages via full keypad interface
• Emergency Communications: One-touch emergency alerting for rapid response
• Worker Safety Features: Man-down, lone worker and emergency alerts
• Secure Communications: Supports encryption for secure operation
• System Compatibility: Works with Capacity Plus, IP Site Connect and conventional systems

Technical Specifications

• Frequency Band: UHF (350–470 MHz)
• Output Power: Up to 4W
• Channel Capacity: Up to 1000 channels
• Display: Full colour display with keypad
• Battery Life: Up to 23 hours (usage dependent)
• Ingress Protection: IP68 (dustproof and waterproof)
• Operating Temperature: -20°C to +55°C (hazardous certified range)
• Audio Output: High-performance speaker with advanced noise cancellation

Approvals and Certifications

• ATEX Certified (IIA Gas Group, Zone 1/2)
• IECEx Certified
• MIL-STD 810 (military-grade durability)
• IP68 Environmental Protection Rating
• Compliant with MOTOTRBO™ digital radio standards

Ideal Applications

• Oil & Gas: Safe communication in explosive and hazardous environments
• Petrochemical Plants: Reliable communication in high-risk processing areas
• Pharmaceutical Manufacturing: Safe communication in controlled environments
• Mining: Durable communication in hazardous underground or surface operations
• Utilities & Energy: Safe field communication in potentially explosive atmospheres

Industries and Use Cases

• Oil and Gas
• Petrochemical and Chemical Processing
• Pharmaceutical Manufacturing
• Mining and Extraction
• Utilities and Energy
• Industrial Hazardous Environments

Understanding UHF vs VHF Radio Frequencies

UHF (Ultra High Frequency) radios, such as this Motorola R7Ex UHF model, are ideal for environments where signals need to penetrate buildings, structures and industrial obstacles. This makes them highly effective for indoor, plant-based and complex operational environments.

In comparison, VHF (Very High Frequency) radios are better suited for open outdoor environments where long-range communication is required with minimal obstruction. UHF is typically the preferred choice for hazardous industrial sites where reliable indoor coverage is critical.

Radio Programming & Setup Options

The Motorola R7Ex can be supplied unprogrammed for organisations that already have an existing system or programming capability. Alternatively, Airacom can programme and configure the radios to your exact requirements, ensuring they are fully operational and ready for immediate deployment.

Programming services include channel configuration, user groups, encryption and full system integration. This is available as an optional service, enabling a tailored communication solution that meets your operational and safety requirements.

System Compatibility & Scalability

The Motorola R7Ex is designed to operate across a range of MOTOTRBO™ communication systems, ensuring scalability and flexibility for growing organisations.

• Conventional Systems: Simple and effective communication for smaller teams
• IP Site Connect: Extends communication across multiple locations using IP networks
• Capacity Plus: Expands system capacity to support larger teams and higher communication demand

This ensures the radio can support both single-site and multi-site hazardous operations, providing a future-proof communication investment.

Product Information

• Manufacturer: Motorola Solutions
• Model: MDH57SDN9RA3AN
• Product Line: MOTOTRBO™ R7Ex
• Category: Intrinsically Safe Digital Two-Way Radio
• Frequency Range: 350–470 MHz (UHF)
• Certification: ATEX & IECEx (IIA, Zone 1/2)
• Warranty: 12 months manufacturer warranty (optional extended 2–5 year warranties available)