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4g/5g modem rtu gateway iot modbus

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  • Xiamen Caimore Communication Technology Co., Ltd. ADD: 901/904 Unit, B20 Building, No.63 Chengyi North Street, Jimei Software Park III, Xiamen, China (361021)
  • +86-592-3799895
  • +86-592-5975885
  • +86 177 0008 2379

4g/5g modem rtu gateway iot modbus

CM550-51F MODBUS GSM GPRS 4G/5G RTU enables various kinds of devices with I/O and AD and Standard MODBUS protocols to communicate over 4G/5G network and the Internet easily and freely.
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4g/5g modem rtu gateway iot modbus

Acquisition and Transmission Integrated Design, Higher Performance
CM550-51F integrates traditional RTU and 4G/5G data transmission unit, and provides many functions including acquisition, counting, control, storage, alarm and transmission Also, RTU realizes the transparent data transmission function of 2.5G/3G IP MODEM. So Caimore RTU has higher performance.

Standard and Convenience
Caimore RTU MODEM  supports standard Modbus RTU and Modbus TCP/IP, and can directly connect to various configuration software WEB configuration. Customers do not need to develop application software specially, so the project progress is accelerated greatly
Rich interface
Caimore RTU provides rich interfaces including 6 CH counter input,8 CH switch input,8 CH analog input,4 CH digital output,2 CH PMW output,4 CH relay output. It has RS232/485 communication port,and RS422/CAN/ZigBee ports are optional.

Synchronous Transmission of Multi Data Centers
Support double data centers, one main and another backup. Support double data center backup and multiple data center ( 8 data center) receiving data, the biggest number of sending center is up to 256.



Standards and Frequency  Bands

F5G NR:n1/n2/n3/n5/n7/n8/n20/n28/n41/n66/n71/n77/n78/n79
LTE: b1/b2/b3/b4/b5/b7/b8/b12/b13/b14/b17/b20/b25/b26/b28/b29/b30/b38/b39/b40/b41/b42/b43/b46/b48

Communication Bandwidth

5G NR: DL 3.4Gbps,  UL 350Mbps
LTE Cat20: DL 2.0Gbps,  UL 150Mbps
HSPA+:DL 42Mpbs,  UL 5.76Mbps

Transmit Power <23dBm 

Receiver Sensitivity <-97dBm



Network Protocols 

TCP/UDP     . 


Keepalives, automatic recovery from failure, 

Self-diagnostics, automatic recovery from failure 

Automatic dial up when powered on  

  Long  connection, short connection, activate by data, SMS,  phone; scheduled online/offline    

Support RS-232 serial port configuration 

Upgrad via serial port or remotely    


Serial port

1 RS232 serial port (supports RS422/TTL) Data bits: 5,6,7,8 bit Stop bits: 1, 1.5,2 bit Parity: none, odd , even , space and mark Baudrate: 110bps ~ 115200bps


With power, ACT communication and online indicator

Antenna Interface

Standard SMA female interface, 50 ohm; optional 3M/5M/10M/15M antenna extension cable, meet the different needs of customers.

UIM interface

1.8V/3V/5V standard putter user card interface, built-in 15KV ESD protection

Power Interface

Block interface, power supply over-voltage protection and reverse current




1xUSB, USB2.0, HOST interface, speed at 12Mbps



Metal shell: metal case, anti-radiation, anti-interference; shell and system security isolation, lightning protection design; meet the power requirements of safety regulations; protection rating IP30; particularly suit for harsh industrial control environments.

Product dimensions

167*104*26mm(not including the antenna and the fixed parts)

Packing Size



0.52kg (the actual type shall prevail)

Power Supply 

Supply voltage

Wide voltage design, DC 7V to the DC32V power supply directly to the device; and built-in power supply over-voltage protection and reverse current protection

Standard power supply


Current while Communicating

Average communication current :200mA @ +9 VDC; Communicating instantaneous peak current: 1.0A @ +9 VDC

Standby current

Standby average current0.15A@+9VDC


Operating Temperature

-25 ºC ~+65ºC

Extended operating

-35 ºC~+75ºC

Storage Temperature


Relative Humidity

95%(No condensation)

4g modem rtu modbus tcp ip rtu GPS GSM RTU gateway

Industrial Automation
Oil & Gas Renewable Energy

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