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 antennas 1
Connector SMA female
SIM slot 2 (3.0 V & 1.8 V)


Serial Interface
Number of ports 1 x RS-232 + 1 x RS-485
Connector 10-pin 3.5 mm RP female socket with lock
Baud rate 300 bps to 115200 bps
RS-232 TxD, RxD, GND
RS-485 A (Data+), B (Data-)


Digital Input / Digital Output
Number of 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+” +5V DC (DI), 30V DC (DO)


USB Port
Number of ports 1 x Mini USB for configuration and power supply
Connector Mini Female
Speed 2.0 high speed up to 480 Mbit/s


LED indicators 1 x RUN + 1 x RSSI (red/green bi-color light)
Built-in RTC, Watchdog, Timer


Software (Basic features of RobustOS)
Network protocols PPP, TCP, UDP, ICMP, HTTP, HTTPs, DNS, NTP, SMTP, Telnet, SSH2, DDNS, etc.
VPN tunnel IPsec, OpenVPN, GRE
Management Web, CLI, SMS
Serial port Transparent, 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
Connector 10-pin 3.5 mm RP female socket with lock
Input voltage 9 to 36V DC
Power consumption Idle: 50 to 70 mA@12 V
Data link: 300 mA (peak) @12 V


Physical Characteristics
Ingress protection IP30
Housing & Weight Plastic, 106 g
Dimensions 85 x 75 x 28.5 mm
Installations Desktop, wall mounting and 35 mm DIN rail mounting


EMI EN 55032: 2015 (CE) Class B
EN 55032: 2015 (RE) Class A
EMS IEC 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.