InDTU324 Compact Industrial Serial to Cellular 4g Modem

InHand Networks SKU: InDTU324LQ25-232


Compact Industrial 4G Serial to Cellular Modem

The InHand InDTU324 compact industrial 4G serial modem is designed to provide connectivity across a broad range of M2M and IoT applications. Featuring LTE CAT M1/NB1 & LTE CAT-4, they allow Internet connectivity via serial ports to PLCs, Meters, Vending Machines. They help to transport data from any industrial device to data control servers, allowing businesses to benefit from real-time data monitoring, management and control.

Industrial Serial-to-Cellular 4G Modem

Operation Band

Network type Model (region) Band
LTE FDD: B1/B3/B7/B8/B20/B28A
GSM: B3/B8
CAT-M1/NB1 InDTU324NQ96 Europe and Asia Pacific - Cat M1/Cat NB1/EGPRS
LTE FDD:B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B26/B28 
LTE TDD: B39 (for Cat M1 only) 

Product Highlights

Ultra Compact Form Factor

Benefit from a compact and ultra-reliable 4g serial modem that packs everything you need for industrial IoT & M2M applications.

Ultra Small Form Factor with 4G and Wifi

Fully Industrial & Compact 4G Modem Design

EMC level 2, fan-less cooling, solid metal shell, strong resistance to vibration and shock, effectively reduce fault rate.

Fully Industrial Design 4G Modem

Low Power Consumption

Fully operational for any M2M/IoT application where the power is often scarce.

Low Power Consumption

Available in NB-IoT and LTE-M1

NB-IoT and LTE-M1

Reliable Wireless Communications

Multi-layer link detection mechanisms including PPP layer heartbeat, ICMP detection, TCP Keepalive and application layer heartbeat, keeping wireless connection "always-on"

Multi-layer link detection mechanisms to keep countinous connecting

Smart Protocol Conversion

Modbus RTU/Modbus TCP protocol conversion for industrial SCADA systems and field devices.

Modbus RTU & Modbus TCP Smart Protocol Conversion

Intelligent Protocol Processing

Supporting user-defined register & heartbeat packets, transparent TCP/UDP protocol, InHand DC protocol, multi-center, 1-5 centers.

Supporting user-defined register & heartbeat packets

InHand Remote Centralized Management

The 4g serial modem InDTU324 is also compatible with InHand Remote Management System. This platform allows remote management & monitor of the status and parameters of all routers & gateways by InHand Networks

Device Manager - Join for free
  • • Remotely manage your distributed InHand serial modem
  • • Upgrade firmware and update configuration in batch effectively
  • • Support grouping management and access control
  • • Monitor device status and data usage in real-time
  • • Easily track your devices in a map view
Device manager - remote management

Product Detail

small cellular industrial 4g model with RS232, RS485 small cellular industrial 4g model

Packaging List

small cellular industrial 4g model with 4g antenna, terminal block


  • CE certification

InDTU324 Hardware Specifications
Industrial Serial Port 2 x Logic serial ports:
Serial port 1: RS-232/RS-485 (Optional)
Serial port 2: RS-232
RS-232 signal: TXD, RXD, GND
RS-485 signal: 485+, 485-, GND
10PIN industrial terminal, 3.5mm pitch
SIM Card Slot 1,8V/3V, drawer-type slot
Antenna 50Ω / SMA x 1
Mechanical Specs
Installation Wall-mounting
Protection Rating IP30
Housing Metal
Cooling Fanless
Power Supply
Power Input DC5-35V
Polarity Reverse Protection Support
Power Interface Pluggable industrial terminal connection
Overload Protection Support
Consumption(@12V) InDTU324L: 12mA (Standby), 50mA (Working), 200mA (Starting), 200mA (Peak)
InDTU324N: 15mA (Standby), 25mA (Working), 200mA (Starting), 200mA (Peak)
Ambient Temperature and Humidity
Working Temperature -40 ~ +70℃
Ambient Humidity 5 ~ 95% (noncondensing)
Storage Temperature  -40 ~ +85℃
LED Indicators
EMC Index
Static EN61000-4-2, level 2
Surge EN61000-4-5, level 2
Shock Wave Immunity EN61000-4-12, level 2
InDTU324 Software Specifications
Network Connection
Network Access APN, VPDN
Access Authentication CHAP/PAP
Network Type GPRS/3G/4G
Network Protocol
Network Protocol Ping, DNS, transparent TCP/UDP, InHand DC TCP/DC UDP, user-defined login/heartbeat data packet
Protocol Conversion Modbus RTU/TCP protocol conversion
Network Security
Multi-level Authorization User levels: administrator, maintenance staff
Certification Security Supports login security certification
Reliable Upgrade Patent upgrade mechanism, ensures reliable upgrade
Link Connection Detection Sends heartbeat packet detection, auto connect once disconnected
Embedded Watchdog Device operation self-detection technology, and self-recovery from operation faults
Network Management
Configuration Method Local serial port, RTool, InHand Device Manager, SMS (InDTU324L only)
Configuration Backup Supports import and export of configuration files
Upgrade Method Patent upgrade mechanism, upgrade firmware through the local serial port or remotely
Log Supports local and online viewing of logs facilitates checking device operating status
Dial-on-Demand Data activation, timed on/off, SMS activation (depends on the carrier’s platform), phone activation (InDTU324L only)
Network Management Supports InHand Device Manager remote central management



Pictures Description Price Add to Cart
$ 4
$ 8

You may also like