Robustel Industrial Cellular Modem RS232/485 – 4G – dual SIM

Robustel M1200 – 4G Gateway


Robustel’s Smart Industrial M1200-4L Smart Gateway is a compact cellular gateway with Serial interface. It is ideal for cost-conscious markets requiring a flexible, high reliability, solution for remote device connectivity in M2M applications.

The M1200-4L automatically opens and maintains an IP connection according to a defined policy. Data is transparently exchanged between connected equipment and a remote server, with no AT Commands required.

The Serial interface supports either RS232 or RS485, including support for Modbus gateway mode (Modbus RTU to Modus over TCP). The USB interface provides a https server for device configuration via PC web-browser. Over-the-air management is possible via optional RobustLink service.

Additionally the M1200-4L has one digital input and two digital outputs, which can be used for alarms and simple control of external devices. The M1200-4L delivers a dependable, very cost-effective remote connectivity solution for industrial automation and IoT applications that is simple to configure, deploy and maintain.

Cellular Interface
Number of antennas1
ConnectorSMA female
SIM slot2 (3.0 V & 1.8 V)


Serial Interface
Number of ports1 x RS-232 + 1 x RS-485
Connector10-pin 3.5 mm RP female socket with lock
Baud rate300 bps to 115200 bps
RS-232TxD, RxD, GND
RS-485A (Data+), B (Data-)


Digital Input / Digital Output
Number of ports2 x DI (wet contact) + 1 x DO (wet contact)
Connector10-pin 3.5 mm RP female socket with lock
ESD withstand levelcontact: ±6 K, air: ±8 K
Absolute maximum VDC“V+” +5V DC (DI), 30V DC (DO)


USB Port
Number of ports1 x Mini USB for configuration and power supply
ConnectorMini Female
Speed2.0 high speed up to 480 Mbit/s


LED indicators1 x RUN + 1 x RSSI (red/green bi-color light)
Built-inRTC, Watchdog, Timer


Software (Basic features of RobustOS)
Network protocolsPPP, TCP, UDP, ICMP, HTTP, HTTPs, DNS, NTP, SMTP, Telnet, SSH2, DDNS, etc.
VPN tunnelIPsec, OpenVPN, GRE
ManagementWeb, CLI, SMS
Serial portTransparent, TCP Client/Server, UDP, Modbus RTU Gateway


App Center (Available Apps for RobustOS)
Apps*Language, RobustLink
*Request on demand. For more Apps please visit


Power Supply and Consumption
Connector10-pin 3.5 mm RP female socket with lock
Input voltage9 to 36V DC
Power consumptionIdle: 50 to 70 mA@12 V
Data link: 300 mA (peak) @12 V


Physical Characteristics
Ingress protectionIP30
Housing & WeightPlastic, 106 g
Dimensions85 x 75 x 28.5 mm
InstallationsDesktop, wall mounting and 35 mm DIN rail mounting


EMIEN 55032: 2015 (CE) Class B
EN 55032: 2015 (RE) Class A
EMSIEC 61000-4-2 2009 (ESD) Contact Level 3;
Air Level 3
IEC 61000-4-4 2012 (EFT) Level 2
IEC 61000-4-5 2014 (Surge) Level 2



When you buy from Roalan you will be treated well. You will get a high-quality product which will not cost you a fortune and you will get more satisfaction out of your purchase than you expected.


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