Robustel R2120
Industrial Dual-SIM Cellular PoE-PSE Router with RS-485
The Robustel R2120 is a compact, ruggedized cellular router with integrated Power over Ethernet (PoE), built to simplify deployment and power management in distributed IoT environments.
Designed for industrial use cases, the R2120 combines 4G LTE connectivity with advanced networking features, offering a seamless edge-to-cloud bridge for critical applications.
With five Ethernet ports, four of which support PoE (PSE)—plus RS-485 serial, digital I/O, and dual SIM support, the R2120 enables rapid deployment of remote IP devices such as cameras, sensors, and access controls, all powered and connected through a single device.
DUAL-SIM CELLULAR
4G/LTE, 3G & 2G with Dual-SIM Card support for failover
PoE-PSE
4× IEEE 802.3af/at PoE‑PSE Ethernet ports
INTERFACES
1x WAN, 4x LAN, 1x RS-485,
2x DI/DO
OPERATING SYSTEM
RobustOS – Lightweight Linux kernel with full SDK
RCMS ON-BOARD
RCMS Cloud device management enabled
Example R2120 Use Cases
IP Camera Uptime
Power and manage remote CCTV or NVRs at construction sites or factories—reboot PoE devices via RCMS and maintain always-on connectivity with dual-SIM LTE.
Street Light Connectivity
Delivers reliable, encrypted connectivity between street-light controllers and management software, so you can schedule dimming, track performance, and act on alerts faster.
Smart Parking Enablement
Provides secure 4G/LTE backhaul for ANPR cameras and gate controllers. Enabling real-time plate data to your parking platform with central monitoring and diagnostics.
Looking for more use cases?
With millions of Robustel devices deployed across more than 100 countries, it’s impossible to capture every use case above. Explore the links below to discover some of the exciting and innovative ways our technology is making an impact worldwide.
This Device is RCMS Ready
RCMS is a cloud-based IoT device management platform that gives you real-time visibility across your entire Robustel fleet. So you can troubleshoot, update, and optimize performance from anywhere at anytime, without sending engineers to site.
Product Mounting Options
Desktop Mount
DIN Rail Mount
Wall Mount
System Architecture
|
Operating System |
RobustOS |
|
CPU |
MT7621, 880MHz |
|
RAM |
512MB |
|
Flash |
32MB |
Cellular
|
Supported Technologies |
4G/LTE, 3G, 2G |
|
Antennas |
2 (MAIN + DIV) |
|
Connector |
SMA-K |
|
SIM |
2 x Mini SIM (2FF) |
Ethernet
|
Ethernet Ports |
5 x 10/100/1000 Mbps – 1 x WAN + 4 LAN or 5 x LAN (Default) |
|
Magnet Isolation Protection |
1 KV |
PoE Out
|
PoE Ports |
ETH1 – ETH4 |
|
PoE Standards |
802.3at, 802.3af |
|
PoE Max Power per Port (PSE) |
Up to 30W |
|
Total PoE Power Budget (PSE) |
Dependent on PSU Capacity |
Serial Port
|
Serial Ports |
1 x RS-485 |
|
Connector |
1 x 3-pin 3.5mm female socket |
|
ESD Protection |
±8 KV air discharge, ±4 KV contact discharge |
|
Baud Rate |
300 bps – 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 KV DC (opto-isolator) |
|
Absolute Maximum VDC |
+30V DC (DI), +30V DC (DO) |
|
Absolute Maximum ADC |
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, supporting AP and Client modes |
|
Frequency Bands |
2.412 ~ 2.472 GHz (2.4 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, 1 x USR |
|
Watchdog |
Built-in |
Power Supply & Consumption
|
PSU Connector |
2-pin 3.5mm female socket with lock |
|
Input Voltage |
44 – 57 V DC |
|
Power Consumption |
Idle: 4.5 W@48 V, excluding the PoE consumption |
|
Recommended Power Supply |
48 V DC, 1.25 A (60 W) |
Note:
1. Total power = System 12 W + ∑PoE loads
2. For 100 m cable runs with 30 W loads per port, consider 54 V DC PSU
Physical Characteristics
|
Ingress Protection |
IP30 |
|
Housing & Weight |
Aluminium, 539g |
|
Dimensions |
49x105x143mm |
|
Installation Options |
Desktop, Wall Mount and 35mm DIN Rail |
|
Operating Temperature |
-20 – +70°C |
|
Storage Temperature |
-40 – +85°C |
|
Relative Humidity |
5 – 95% RH (non-condensing) |
Software Features
|
Network Protocols |
PPP, PPPoE, TCP, UDP, DHCP, ICMP, NAT, HTTP, HTTPs, DNS, NTP, SMTP, Telnet, ARP, VLAN, SSH2, DDNS, 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 |
|
Optional Apps |
L2TP, PPTP, DMVPN, VRRP, QoS, SNMP, Language, RCMS, Dynamic Route, Captive Portal, Modbus Master, TR069, Edge2Cloud, etc. |
Software Development Kit (SDK)
|
Supported Programming Languages |
C, C++ |
|
Flash available for SDK |
5MB |
|
RAM available for SDK |
256MB |
Regulatory and Type Approvals
|
Environmental |
RoHS 2.0, WEEE |
|
Testing |
IEC 60068-2-6 (Sinusoidal Vibration) |
|
EMI |
EN 55032 Conducted Emission Class B |
|
EMS |
EN 61000-3-2 (Harmonic Current) |
Available Models
|
Model |
Supported Frequency Bands |
Certifications |
Order Code |
Package Contents |
|
R2120-A5AAA-4L-A12EU |
4G LTE FDD: B1/B3/B7/B8/B20/B28A |
CE, UKCA, CB |
A015000001 |
1 x R2120 Router (B Code: B015000001) |
|
R2120-A5AAA-4L-A12EU |
4G LTE FDD: B1/B3/B7/B8/B20/B28A |
CE, UKCA, CB |
A015000004 |
1 x R2120 Router (B Code: B015000001) |
|
R2120-A5AAA-4L-A13AU |
4G LTE FDD: B1/B2/B3/B4/B5/B7/B8/B28 |
RCM |
A015000002 |
1 x R2120 Router (B Code: B015000002) |
|
R2120-A5AAA-4L-A13AU |
4G LTE FDD: B1/B2/B3/B4/B5/B7/B8/B28 |
RCM |
A015000005 |
1 x R2120 Router (B Code: B015000002) |
NOTE:
1. For more information about regional & carrier specific variants please contact us
R2120 Downloads
Please note that all product downloads are now located on the Robustel Knowledge Base (https://support.robustel.com) the buttons below will take you to the relevant sections for each product.
Product Documentation
Firmware, Software & Applications
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