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4G - LTE 800, LTE 850, LTE 900, LTE 1800, LTE 2100, LTE 2600, LTE 2300, LTE 2500, UMTS 850, UMTS 900, UMTS 2100, ... - LTE, LTE Cat 4, HSPA+, UMTS, EDGE, GPRS - Dual Band - 2.40 GHz ISM Band - 5 GHz UNII Band - 18.75 MB/s Wireless Speed - 4 x Network Port - 1 x Broadband Port - USB - Fast Ethernet - VPN Supported - DIN Rail Mountable
$861.18
Special order — estimated available by September 10, 2026.
Genuine Advantech through authorized distribution — TAA country-of-origin verified and NDAA §889 screened before checkout.
SmartFlex SR304 cellular router provides secure Internet connectivity for devices and LANs via cellular networks. It provides automatic wireless failover for wired networks, wireless connectivity for devices in remote locations such as industrial PCs, HMIs, traffic controllers, kiosks, meters, cameras, and much more.
SmartFlex serves well also for applications that require video transmitting because of download speed up to 150 Mbps and upload speed up to 50 Mbps.
Modular SmartFlex design can be ordered in many hardware options. Standard hardware configuration always includes 2 Ethernet 10/100 ports with 2 independent LANs/IP addresses - optionally with POE+ PSE or POE PD feature - 1 USB host port, 1 microSD cardholder, 2 SIM card holders for automatic failover to an alternate service provider, 2 binary inputs (I/O), 1 binary output (I/O), and onboard GPS/Glonass receiver.
As an extension to hardware interface options above can be modified by an additional 3× 10/100 ETH board (so totally up to 5 Ethernet ports configured for 3 independent LANs/IP addresses) or combined Ethernet/RS-232/485 board or RS-232/485 board (isolation strength up to 2.5kV). An optional built-in Wi-Fi module also available with industrial-grade operating temperature ranges from -40 to +75 °C.
SmartFlex transfer intelligence at the network edge with a powerful Cortex A8 CPU, 256 MB flash memory, 512 MB RAM, and 128kB M-RAM.
A secure Web interface allows users to configure and manage SmartFlex from remote locations. The SmartFlex supports real-time data encryption and the creation of VPN tunnels using IPsec, OpenVPN, GRE, etc. It supports standard and advanced networking features like DHCP, NAT, NAT-T, DynDNS, NTP, VRRP, control by SMS, and numerous other functions.
With an open Linux platform and the wide possibility of programming customer SW applications in Python, C/C++ or browser-based flow editor Node-RED the SmartFlex offers a real open development platform for Industrial IoT applications. The Advantech existing Router App library (User modules) with apps already developed to enhance specific router functionalities include industrial protocol conversions and support of IoT platforms such as MS Azure, Cumulocity, and others.
SmartFlex is easy to install individually and in mass deployments scenarios too by using a full-featured configuration and monitoring software tool WebAccess/DMP. Safe remote VPN access to customer devices and PCs connected to routers through Internet can be administrated by additional software WebAccess/VPN.
| General Information | |
|---|---|
| Manufacturer | Advantech Co., Ltd |
| Manufacturer Part Number | BB-SR30410115 |
| Brand Name | Advantech |
| Product Line | SmartFlex |
| Product Model | SR304 |
| Product Name | SmartFlex SR304 Modem/Wireless Router |
| Product Type | Modem/Wireless Router |
| Interfaces/Ports | |
| Total Number of Network Ports | 5 |
| Number of Network (RJ-45) Ports | 4 |
| USB | Yes |
| PoE (RJ-45) Port | No |
| Number of Broadband (RJ-45) Ports | 1 |
| Network & Communication | |
| Ethernet Technology | Fast Ethernet |
| VPN Supported | Yes |
| Multi-SIM Supported | Yes |
| Number of SIM Card Supported | 2 |
| SIM Size Supported | Mini |
| Physical Characteristics | |
| Product Material | Plastic |
| Form Factor | DIN Rail Mountable |
| Height | 2.2" |
| Width | 4.9" |
| Depth | 3.8" |
| Weight (Approximate) | 6 oz |
| Storage | |
| Flash Memory Capacity | 512 MB |
| Storage Media | MicroSD |
| Technical Information | |
| Wi-Fi Generation | Wi-Fi 4 |
| Network Band | Dual Band |
| Processor Type | Cortex A8 |
| Standard Memory | 512 MB |
| Wireless Specifications | |
| Broadband Transmission Technology | Cellular, Ethernet |
| Wireless LAN Standard | IEEE 802.11a/b/g/n |
| ISM Band | Yes |
| UNII Band | Yes |
| ISM Maximum Frequency | 2.40 GHz |
| UNII Maximum Frequency | 5 GHz |
| Cellular Generation | 4G |
| Cellular Network Supported | LTE 800, LTE 850, LTE 900, LTE 1800, LTE 2100, LTE 2600, LTE 2300, LTE 2500, UMTS 850, UMTS 900, UMTS 2100, TD-SCDMA, TD-SCDMA 850, TD-SCDMA 900, TD-SCDMA 2100 |
| Cellular Data Connectivity Technology | LTE, LTE Cat 4, HSPA+, UMTS, EDGE, GPRS |
| Total Wireless Transmission Speed | 18.75 MB/s |
| Miscellaneous | |
| Package Contents |
|
| Environmental Compliance | Restriction of Hazardous Substances (RoHS) 3, Waste Electrical and Electronic Equipment Directive (WEEE), Registration, Evaluation, Authorization and Restriction of Chemicals (REACH), Restriction of Hazardous Substances (RoHS) |
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