robustel R2120 Smart Industrial IoT Gateway
Safety Information General
- The router generates radio frequency (RF) power. When using the router, care must be taken on safety issues related to RF interference as well as regulations of RF equipment.
- Do not use your router in aircraft, hospitals, petrol stations or in places where using cellular products is prohibited.
- Be sure that the router will not be interfering with nearby equipment. For example: pacemakers or medical equipment. The antenna of the router should be away from computers, office equipment, home appliance, etc.
- An external antenna must be connected to the router for proper operation. Only uses approved antenna with the router. Please contact authorized distributor on finding an approved antenna.
RF Exposure
- This device meets the official requirements for exposure to radio waves. This device is designed and manufactured not to exceed the emission limits for exposure to radio frequency (RF) energy set by authorized agencies.
- The device must be used with a minimum separation of 20 cm from a person’s body to ensure compliance with RF exposure guidelines. Failure to observe these instructions could result in your RF exposure exceeding the applicable limits.
Note: Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is open. Router may be used at this time.
The symbol indicates that the product should not be mixed with general household waste but must be sent to separate collection facilities for recovery and recycling.
The symbol indicates that the product meets the requirements of the applicable EU directives.
The symbol indicates that the product meets the requirements of the relevant UK legislation.
Related download link
Find more product documents or tools at: www.robustel.com/en/documentations/
Technical Support
- Tel: +86-20-82321505
- Email: support@robustel.com
- Web: www.robustel.com
Document History
Updates between document versions are cumulative. Therefore, the latest document version contains all updates made to previous versions.
| Date | Firmware Version | Document Version | Change Description |
| Jan 2, 2025 | 5.3.0 | 1.0.0 | Initial release. |
Overview
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.
Package Checklist
Before commencing installation ensure your package has the following components:
Note: The accessories could be different, please refer to actual order information.
Panel Layout (May Vary on Different Models) 
Table1:
| Model | PN | Cellular Antenna Port | WIFI/BLE Antenna Port |
| R2120-A5AAA-4L-A12EU | B015000001 | 2 | 2 |
| R2120-A5AAA-4L-A13AU | B015000002 | 2 | 2 |
Interface Descriptions
- Power Supply. The power supply also serves as the PoE power source, ranging from 44 to 57 VDC, with reverse polarity protection.
Name Description + DC Power positive 
– DC Power negative - Ethernet Ports. R2120 has 5 Ethernet ports: ETH0 can be WAN or LAN, ETH1-ETH4 are limited to LAN only.
ETH1~ETH4 support 802.3at and 802.af PoE PSE.
| LED | Description | |
| Link | On | Link on |
| On, blinking | Transmitting data | |
| Off | Link off | |
Note:
- PoE functions when the connected power supply outputs 44V or higher.
- Total PoE budget is reliant on the power supply. Choose a suitable power supply to ensure both the router and connected PoE device/devices operate effectively.
- Maximum power consumption of R2120 is 12W @48V, excluding PoE consumption.
Serial Port. One RS485 port with both power and signal isolation.
| Description | ||
| A | RS485_A |  |
| B | RS485_B | |
| G | Isolated Ground | |
DIDO. Two sets of digital inputs and two sets of digital outputs, all utilizing wet contacts.
| Name | Type | Description | |
| DI1+ | Digital Input | Digital Input positive |  |
| DI1- | Digital Input negative | ||
| DI2+ | Digital Input positive | ||
| DI2- | Digital Input negative | ||
| DO1+ | Digital Output | Digital Output positive | |
| DO1- | Digital Output negative | ||
| DO2+ | Digital Output positive | ||
| DO2- | Digital Output negative |
Note:
- For DO, the external power supply DC voltage range is 5V~30V, 0.1A max.
- For DI, the absolute maximum VDC is 30V.
- Some applications of DIDI for reference are as below:
LED Indicator
| Name | Color | Status | Description | |
| RUN | Green | Fast Blinking(250ms) | Router is preparing (system initialization) | |
| On, blinking(500ms) | Router starts operating | |||
| Off | Router is powered off | |||
| MDM | Green | On, solid | Link connection is working | |
| On, blinking | Data is sent and received | |||
| Off | Link connection is not working | |||
| USR | USR-OpenVPN | Green | On, solid | OpenVPN connection is established |
| Off | OpenVPN connection is not established | |||
| USR-IPsec | Green | On, solid | IPsec connection is established | |
| Off | IPsec connection is not established | |||
| USR-SIM | Green | On, solid | Using primary SIM card 1 | |
| On, blinking | Using backup SIM card 2 | |||
| Off | Using WAN link (no SIM card inserted) | |||
| RSSI | Green | On, solid | Received Signal Strength Indication greater than -73 dBm (Strong signal) | |
| On, blinking (1s) | Received Signal Strength Indication -91 to -73 dBm (Moderate signal) | |||
| Fast blinking | Received Signal Strength Indication -111 to -93dBm (Weak signal) | |||
| — | Off | No signal | ||
Note: You can choose the display type of USR LED. For more details, please refer to
RT123_SM_RobustOS Software Manual, Services > Advanced > System >System Settings > User LED Type.
| Feature | Operation |
| Reboot | Press and hold the RST button for 2~ 5 seconds under the operating status. |
| Restore to default configuration | Press and hold the RST button for 5~10 seconds, the RUN LED starts blinking quickly, the router will restore to defaultconfiguration. |
| Restore to factory default settings | Once the operation of restoring default configuration is performed twice within one minute, the router will restore to factory default settings. |
| Note: The more details please refer to RT123_SM_RobustOS Software Manual, 2.3 Factory Reset. | |
Hardware Installation
- SIM Card Installation. Remove the SIM card cover to insert the SIM cards into the device, then screw up the cover.
Antenna Installation. Rotate the antenna into the antenna connector accordingly. 
- Terminal Block Installation. Insert the 3-PIN or 4-PIN terminal blocks into the interfaces connector, then can connect the devices or sensors to the router via corresponding interfaces.
- Mounting Kit Installation. Use M3 screws to fix the DIN rail kit or wall mounting kit to the device.
- DIN Rail Mounting
- Wall Mounting
- Grounding the Device. Grounding will help to prevent the noise effect due to electromagnetic interference (EMI). Connect the device to the site ground wire by the grounding screw before powering on.
- Power Supply installation. Insert the power supply cord into the corresponding terminal block if needed, then insert the terminal block into the power connector.
- Access the router settings through a web interface for configuration. Connect the Ethernet cable to any port labeled ETH1~ETH4 of the router, and connect the other end of the cable to your computer.
Login to the Device
- Connect the router’s Ethernet port to a PC with a standard Ethernet cable.
- Before logging in, manually configure the PC with a static IP address on the same subnet as the gateway address, click and configure “Use the following IP address”.
- To enter the router’s web interface, type http://192.168.0.1 into the URL field of your Internet browser.
- Use login information shown in the product label when prompted for authentication.
- After logging in, the home page of the web interface is displayed, then you can view system information and perform configuration on the device.
- The automatic APN selection is ON by default, if need to specify your own APN, please go to the menu Interface->Link Manager->Link Setting->WWAN Settings to finish the specific setting.
- The more configuration details please refer to RT123_SM_RobustOS Software Manual.(END)
Regulatory and Type Approval Information
Table 1: Toxic or Hazardous Substances or Elements with Defined Concentration Limits
| Name of the Part | Hazardous Substances | |||||||||
| (Pb) | (Hg) | (Cd) | (Cr(VI)) | (PBB) | (PBDE) | (DEHP) | (BBP) | (DBP) | (DIBP) | |
| Metal parts | X | o | o | o | – | – | – | – | – | – |
| Circuitmodules | o | o | o | o | o | o | o | o | o | o |
| Cables and cable assemblies | o | o | o | o | o | o | o | o | o | o |
| Plastic and polymeric parts | o | o | o | o | o | o | o | o | o | o |
o:Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement in RoHS2.0.X:Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials for this part might exceed the limit requirement in RoHS2.0.Indicates that it does not contain the toxic or hazardous substance.Note: Excessive lead can be exempted.
|
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Radio Specifications for Europe
Model: R2120-A5AAA-4L-A12EU
| RF technologies | 2G, 3G, 4G, Wi-Fi |
| Cellular Frequency | 4G: LTE FDD: B1/B3/B7/B8/B20/B28 LTE TDD: B38/B40/B413G: WCDMA: B1/B82G: GSM900/DCS1800 |
| Wi-Fi Frequency | 2.4 GHz: 2.412 – 2.472 GHz5 GHz: 5.150 – 5.825 GHz |
| Max RF power | 33 dBm±2dB@GSM, 24 dBm+1/-3dB@WCDMA, 23 dBm±2dB@LTE, 18 dBm ± 2dB@Wi-Fi |
Note: The 5150 to 5350 MHz frequency range is restricted to indoor use only in.
FCC Caution
Caution: The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s) and Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause interference.
- This device must accept any interference, including interference that may cause undesired operation of the device.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC& IC Radiation Exposure Statement
This equipment complies with FCC and Canada radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Simplified EU & UK Declaration of Conformity
We, Guangzhou Robustel Co., Ltd. are located at 501, Building #2, 63 Yongan Road, Huangpu District, Guangzhou, China, declare that this radio equipment complies with EU Radio Equipment Directive (RED) 2014/53/EU, Low Voltage Directive (LVD) 2014/35/EU, EMC Directive 2014/30/EU, UK Radio Equipment Regulations 2017, EMC Regulations 2016, Electrical Equipment (Safety) Regulations 2016. The full text of the EU& UK DoC is available at the following internet address: www.robustel.com/certifications/
FAQ
- Q: Can I use the device outdoors?
A: The 5150 to 5350 MHz frequency range is restricted to indoor use only. Ensure compliance with usage restrictions. - Q: What should I do if I encounter interference?
A: If interference occurs, consider reorienting the antenna, increasing separation from other equipment, or consulting a professional for assistance.
Documents / Resources
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robustel R2120 Smart Industrial IoT Gateway [pdf] Instruction Manual R2120-A5AAA-4L-A12EU, R2120 Smart Industrial IoT Gateway, R2120, Smart Industrial IoT Gateway, Industrial IoT Gateway, IoT Gateway |
