Description

Product Overview

The Siemens 6NH9720-3AA00, also identified as the SINAUT MD720-3, serves as a high-performance GSM/GPRS mobile radio modem specifically engineered for industrial telecontrol and remote maintenance. This robust communication terminal enables automation systems to transmit data across long distances where wired infrastructure is either unavailable or cost-prohibitive. By leveraging Quadband GSM technology, the modem ensures global compatibility for transmitting critical operational data via GPRS packet-switched networks or SMS messaging.

Advanced Communication Capabilities

This modem facilitates seamless integration with PLC systems through its versatile RS-232 interface. Because the unit supports standard AT commands, engineers can easily configure the device for diverse communication protocols. Furthermore, the 6NH9720-3AA00 maintains persistent GPRS connections, which allows for “always-on” functionality in remote monitoring applications. Consequently, this feature enables real-time data access and rapid response times for distributed assets.

• Quadband Support: The device operates across 850, 900, 1800, and 1900 MHz frequencies to provide reliable coverage in various geographic regions.
• Persistent Connectivity: Integrated automatic connection management ensures that the GPRS link remains active, automatically re-establishing communication after power cycles or signal drops.
• Diagnostic Interface: Integrated LED indicators provide immediate visual feedback regarding power status, signal strength, and active data transmission.
• Security Features: The modem supports secure data handling through its compatibility with industrial VPN tunnels and private APN settings.

Industrial Grade Reliability and Installation

Engineered to withstand the rigors of industrial environments, the Siemens 6NH9720-3AA00 features a rugged housing with an IP40 protection rating. Moreover, the hardware operates reliably across an extended temperature range from -20°C to +60°C, making it suitable for outdoor control cabinets. Since the modem utilizes a standard 24V DC power supply, it integrates perfectly into existing electrical panels. Additionally, the inclusion of an SMA antenna socket allows for the attachment of high-gain external antennas, which significantly improves signal reception in shielded or remote areas.

Technical Specifications

• Manufacturer: Siemens
• Model Number: 6NH9720-3AA00
• Product Line: SINAUT ST7 / MD720-3
• Network Standards: GSM, GPRS, CSD (up to 9600 bit/s), SMS
• Frequency Bands: 850 / 900 / 1800 / 1900 MHz
• Serial Interface: RS-232 (9-pin Sub-D) / PPI
• Power Supply: 12V to 30V DC (24V Nominal)
• Dimensions: 22.5 mm x 99 mm x 114 mm (Approx.)
• Mounting: 35mm DIN Rail