Robustel M1200
Industrial Cellular Serial/USB Modem and Smart IoT Gateway
The Robustel M1200-4L is a compact industrial LTE Cat-4 gateway that can run as a traditional modem or as a standalone smart gateway.
In Bridge Mode, it passes the public IP via serial or mini-USB for drop-in integration with existing systems no application changes required. Switch to gateway mode to enable dual-SIM resilience, transparent TCP/UDP, Modbus RTU-to-TCP, and VPN options including IPsec, OpenVPN, GRE, L2TP, and PPTP.
Interfaces include RS-232/RS-485 plus 2×DI and 1×DO for common PLC and metering workflows; management is available via Web/CLI/SMS. Fleet operations can be supported via RCMS with firmware/config push and optional RobustVPN for secure remote access. Built for control cabinets and field deployments, it accepts 9–36 V DC, operates from −40 to +70 °C, and mounts on DIN rail or wall.
CELLULAR MODEM
2G, 3G and 4G/LTE Cat-4
TCP/IP Connectivity
IoT Gateway
Allows security, management, and protocol translation.
RS-232/485 SERIAL
RS-232/485 Serial Interface for Industrial Connectivity
USB 2.0
High-Speed USB 2.0 Interface for Modem Connectivity
INDUSTRIAL DESIGN
3-36 VDC powered supporting temperatures of -40 – +70 °C
M1200 Product Video
Example M1200 Use Cases
Smart Metering
Use M1200-4L in Bridge Mode as cellular backhaul behind your DCU. Switch to Gateway Mode to poll RS-485 meters, translate Modbus RTU/TCP, trigger DI/DO alarms, and manage fleets via RCMS.
Industrial PLC Connectivity
In Bridge Mode, pass the public IP to existing routers or controllers for zero-change integration. Gateway Mode enables Transparent TCP/UDP & Modbus RTU/TCP communication.
Legacy Equipment Connectivity
For vending, ticketing, and serial devices, Bridge Mode delivers LTE backhaul with minimal change. Gateway Mode adds protocol translation, DI/DO events, RobustVPN access, and RCMS monitoring.
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 |
ARM 300MHz |
|
RAM |
64MB |
|
Flash |
16MB |
Cellular
|
Supported Technologies |
4G/LTE Cat-4, 3G, 2G |
|
Antennas |
1 (MAIN) |
|
Connector |
SMA-K |
|
SIM |
2 x Mini SIM (2FF) |
Serial Port
|
Serial Ports |
1 x RS-232 + 1 x RS-485 |
|
Connector |
10-pin 3.5 mm RP female socket with lock |
|
Baud Rate |
3000 bps ~ 115200 bps |
|
Signal Definition |
RS-232: TxD, RxD, GND |
Digital Input/Outputs
|
DI/DO Ports |
2 x DI (wet contact) + 1 x DO (wet contact) |
|
Connector |
10-pin 3.5 mm RP female socket with lock |
|
ESD withstand level |
Contact: ±6 K; Air: ±8 K |
|
Absolute maximum VDC |
“V+” DC (DI), 30 V DC (DO) |
USB Port
|
USB Ports |
1 x Mini USB |
|
Connector |
Mini Female |
|
Speed |
2.0 high speed, up to 480 Mbit/s |
Other Interfaces
|
Reset Button |
1 x RST |
|
LED Indicators |
1 x RUN, 1 x RSSI (red/green bi-color light) |
Power Supply & Consumption
|
PSU Connector |
10-pin 3.5 mm RP female socket with lock |
|
Input Voltage |
12/24 V DC, 9 ~ 36 V DC Reverse polarity protection, surge protection |
|
Power Consumption |
Idle: 1 W@12 V |
|
Recommended Power Supply |
12 V DC/1.0 A power adapter |
Physical Characteristics
|
Ingress Protection |
IP30 |
|
Housing & Weight |
Metal, 106 g |
|
Dimensions |
28.5 x 75 x 85 mm |
|
Installation Options |
Desktop, Wall Mount and 35mm DIN Rail |
|
Operating Temperature |
-40 – +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 Gateway |
Software Development Kit (SDK)
|
Supported Programming Languages |
C, C++ |
|
Flash available for SDK |
3MB |
|
RAM available for SDK |
16MB |
Regulatory and Type Approvals
|
Environmental |
RoHS 2.0, WEEE |
|
EMI |
EN 55032 Conducted Emission Class B |
|
EMS |
EN 61000-4-2 (ESD) Contact Level 2, Air Level 3 |
Available Models
|
Model |
Supported Frequency Bands |
Certifications |
Order Code |
Package Contents |
|
M1200-4L |
4G/LTE FDD: B1/B3/B5/B7/B8/B20 |
ICASA, CE, UKCA |
A003300703 |
1 x M1200 Gateway (B Code: B033702) |
|
M1200-4L |
4G/LTE FDD: B1/B2/B3/B4/B5/B7/B8/B28 |
CRC, SUBTEL, RCM, FCC, |
A003300704 |
1 x M1200 Gateway (B Code: B033701) |
NOTE:
1. For more information about regional & carrier specific variants please contact us
2. * Denotes Certification in Progress
M1200 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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