R2120-5G
R2120-5G
Industrial Dual-SIM 5G NR Cellular PoE-PSE Router with RS-485
The Robustel R2120 5G is an industrial cellular PoE router designed for field deployments where connected cameras, controllers, sensors, access devices, and legacy equipment need reliable high-capacity backhaul from a single compact router.
Built around the same practical PoE-PSE architecture as the R2120 platform, the 5G variant adds 5G NR SA/NSA connectivity with broad global band support, while retaining five Gigabit Ethernet ports, four 802.3af/at PoE-PSE ports, dual SIM, Wi-Fi, RS-485, digital I/O, and remote management through RCMS.
For systems integrators and operators, this makes the R2120 5G especially useful in distributed sites where several IP devices must be powered, connected, monitored, and remotely maintained without adding separate PoE switches, cellular gateways, or site visits for basic recovery tasks.
Features
- Highly stable 5G/4G/3G/2G cellular connectivity
- Dual SIM card slots for redundant communications
- Supports Ethernet, Wi-Fi and Cellular internet with auto-failover
- 5 x 1000Mbps Ethernet ports, including 4 PoEPSE ports compliant with the 802.3af and 802.3at standards
- 2 x DI & 2 x DO for simple monitoring and control
- 1 x RS-485 port for connection to industrial/legacy device
- Fully programmable Operating System with well documented SDK
- Multiple VPN options available including DMVPN & IPSec
- Free cloud management platform–RCMS, with Remote PoE device management supported
- Introduction
- Application
- Specification
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Introduction
The R2120 is a specialized industrial cellular PoE router designed for smart security applications. Equipped with 5 Ethernet ports, including 4 PoE-PSE ports, along with 2 Digital Inputs, 2 Digital Outputs, and an RS485 serial port, this router excels in meeting the unique demands of modern security systems.
Enhanced PoE-PSE Functionality: The R2120 features 4 PoE-PSE ports compliant with the 802.3af and 802.3at standards, enabling effortless power and data transmission through a single Ethernet cable to simplify field installation.
Remote PoE Device Management: The R2120 goes beyond standard PoE-PSE functions with its support for remote management capabilities. Users can conveniently schedule restarts or power cycles for PoE devices as required, enhancing operational control and efficiency.
The Robustel Cloud Manager Service (RCMS) is a unified cloud-based platform designed for real-time monitoring and centralized management of industrial IoT devices. Fully compatible with Robustel routers and gateways, RCMS delivers an interactive geospatial dashboard that enables users to visualize device locations and track critical metrics such as data usage, signal strength, and network status. To ensure seamless operations, the platform facilitates over-the-air (OTA) updates for firmware, configurations, and applications, minimizing downtime while optimizing system performance.
Available Models
| Model | Supported Frequency Bands | Certifications | Order Code | Package Contents |
|---|---|---|---|---|
|
R2120-A5AAA-5G-A25GL Global |
5G NR SA/NSA: n1/2/3/5/7/8/12/13/14/18/20/25/26/28/29/30/38/40/41/48/66/70/71/75/76/77/78/79 4G/LTE FDD: B1/2/3/4/5/7/8/12/13/14/17/18/19/20/25/26/28/29/30/32/66/71 4G/LTE TDD: B34/38/39/40/41/42/43/48 LAA: B46 (only supports 2x2 MIMO) 3G: B1/2/4/5/8/19 |
CE, UKCA | A015000003 |
1 x Router (B Code: B015000003) 1 x DIN Rail Mounting Kit |
|
R2120-A5AAA-5G-A25GL Global |
5G NR SA/NSA: n1/2/3/5/7/8/12/13/14/18/20/25/26/28/29/30/38/40/41/48/66/70/71/75/76/77/78/79 4G/LTE FDD: B1/2/3/4/5/7/8/12/13/14/17/18/19/20/25/26/28/29/30/32/66/71 4G/LTE TDD: B34/38/39/40/41/42/43/48 LAA: B46 (only supports 2x2 MIMO) 3G: B1/2/4/5/8/19 |
CE, UKCA | A015000006 |
1 x Router (B Code: B015000003) 4 x Cellular Antenna 2 x Wi-Fi Antenna 1 x Power Adapter 1 x DIN Rail Mounting Kit |
Application
Specification
System Architecture
| Operating System | RobustOS |
| CPU | MT7621, 880 MHz |
| RAM | 512 MB |
| Flash | 32 MB |
Cellular
| Supported Technologies | 5G, 4G/LTE, 3G, 2G |
| Antennas | 4 (MAIN + DIV) |
| Connector | SMA-K |
| SIM | 2 x Mini SIM (2FF) |
Ethernet
| Ethernet Ports | 5 x 10/100/1000 Mbps – 1 x WAN + 4 x LAN or 5 x LAN (Default) |
| Magnet Isolation Protection | 1 kV |
Serial Port
| Serial Ports | 1 x RS-485 |
| Connector | 1 x 3-pin 3.5mm female socket |
| Baud Rate | 300–115200 bps |
| Signal Definition | RS-485: A, B, GND |
Digital Input/Output
| DI/DO Ports | 2 x DI + 2 x DO (wet contact) |
| Connector | 2, each with 4-pin 3.5mm female sockets |
| Isolation | 3.75 kVDC (opto-isolator) |
| Absolute Maximum Voltage | +30V DC (DI), +30V DC (DO) |
| Absolute Maximum Current | 100 mA (DO) |
| Signal Definition | DI1+, DI1-, DI2+, DI2-, DO1+, DO1-, DO2+, DO2- |
Wi-Fi
| Wi-Fi Antennas | 2 (Wi-Fi 0 + Wi-Fi 1) |
| Connector | RP-SMA-K |
| Standards | 802.11 a/b/g/n/ac; 2 x 2 MIMO; supports AP and client modes |
| Frequency Bands | 2.412–2.472 GHz (2.4 GHz ISM band) 5.15–5.825 GHz (5 GHz ISM band) |
| Security | WPA, WPA2, WEP, WPA3 |
| Encryption | AES, TKIP, WEP64 |
Other Interfaces
| Reset Button | 1 x RST |
| LED Indicators | 1 x RUN, 1 x RSSI, 1 x MDM, and 1 x USR |
| Watchdog | External |
Power Supply & Consumption
| PSU Connector | 2-pin 3.5mm female socket with lock |
| Input Voltage |
44–57 VDC (with PoE-PSE) 12–36 VDC (without PoE-PSE) Reverse polarity protection, surge protection |
| Power Consumption |
Idle: 4.5 W @ 48 V (excluding PoE consumption) Max: 12 W @ 48 V (excluding PoE consumption) |
| Recommended Power Supply |
48 V DC, 1.25 A (60 W) Covers system power (12 W) + typical PoE loads |
Physical Characteristics
| Ingress Protection | IP30 |
| Housing & Weight | Aluminium, 539 g |
| Dimensions | 49 x 105 x 143 mm |
| Installation Options | Desktop, Wall Mount and 35mm DIN Rail |
| Operating Temperature | -20 to +70°C |
| Storage Temperature | -40 to +85°C |
| Relative Humidity | 5–95% RH (non-condensing) |
Software Features
| Network Protocols | PPP, PPPoE, ARP, VLAN, ICMP, NAT, TCP, UDP, DHCP, DNS, DDNS, NTP, HTTP, HTTPS, Telnet, SSH2, SMTP, etc. |
| VPN Tunnels | IPsec, OpenVPN, GRE, WireGuard |
| Firewalls | DMZ, anti-DDoS, Filtering (IP/Domain Name/MAC Address), Port Mapping, Access Control |
| Remote Management | RCMS, Web, CLI, SMS |
| Serial Port Protocols | Transparent, TCP Client/Server, UDP, Modbus RTU to TCP |
| SIM Management | Smart Roaming V3 |
| Optional Apps | L2TP, PPTP, DMVPN, VRRP, QoS, SNMP, Language, RCMS, Dynamic Routing, Captive Portal, Modbus Master, TR069, Edge2Cloud, etc. |
Software Development Kit (SDK)
| Supported Programming Languages | C, C++, Python, Java, Node.js, etc. (for users to develop their own applications) |
| Flash Available for SDK | 5 MB |
| RAM Available for SDK | 256 MB |
Regulatory and Type Approvals
| Environmental | RoHS 2.0, WEEE |
| Testing |
IEC 60068-2-6 (Sinusoidal Vibration) IEC 60068-2-27 (Mechanical Shock) IEC 60068-2-64 (Random Vibration) |
| EMI |
EN 55032 Conducted Emission Class B EN 55032 Radiated Emission Class B |
| EMS |
EN 61000-3-2 (Harmonic Current) EN 61000-3-3 (Voltage Flicker) EN 61000-4-2 (ESD) Contact Level 2, Air Level 3 EN 61000-4-3 (RS) Level 2 EN 61000-4-4 (EFT) Level 2 EN 61000-4-5 (Surge) Level 3, AC Mains Power Port; Level 3, Signal Ports EN 61000-4-6 (CS) Level 2 |
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