---
lang: "en"
title: "Industrial GSM Cellular Modem InDTU-332"
sku: "INDTU332GS55-485"
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brand: "MARCOM S.r.l."
end_of_life: "false"
---

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InDTU332GS55: Robust industrial digital cellular unit (DTU) designed to transmit serial data over GSM/GPRS mobile networks.

The InDTU 332 Series modems are designed for sending serial communications over GSM/GPRS mobile networks. The modems have a compact design and feature high performance with security features and low power consumption. The design used components capable of withstanding particularly harsh environments, for example, for high temperature variations from -25 °C to +70°C. Or for conditions with particularly wide power supply ranges, from 5V to 35V, and stringent EMC conditions. The modem can be programmed with various tools, including a powerful software tool or a cloud administration site, the Device Manager. InDTU 332 is a widely used product and complies with the DL/T 721-2000 standard for remote control in power grid automation systems. Features:

| **Serial interface** |
|---|
| Description | RS232 or RS485 optional, baudrate: 1200-115200 |
| ESD Protection**** | 15kV   |
| Serial Protocol | Transparent TCP, Virtual COM, Modbus RTU |
| **• Cellular WAN Interfaces****** |
| GSM/GPRS

 

CDMA | 850/900/1800/1900 MHz 

 

800/1900 MHz (for India and China) |
| **• ****SIM Card ** |
| SIM  | 3V, flip SIM card, Anti-dismantlement  |
| **•****Environment** |  |
| Temperature | Operating: -25~70℃

 

Storage: -40~85℃ |
| Humidity | 5% ~ 95%, non-condensing |
| Enclosure | Plastic enclosure, IP30 |
| Weight | 120g |
| Power Supply | 5 to 35V DC |
| Consumption | Idle: [](mailto:12mA@12V)[12mA@12V>](mailto:12mA@12V</a)

 [](mailto:12mA@12V</a) 

[Operating: ](mailto:12mA@12V</a)[](mailto:100mA@12V)[100mA@12V> (<1.5w)](mailto:100mA@12V</a)

 [](mailto:100mA@12V</a) |
| **•****EMC** |   |
| ESD | EN61000-4-2, level 4 |
| Surge protection | EN61000-4-5, Level 3 |
| EFT | EN61000-4-4, Level 4 |
| Radiated, radio frequency, electromagnetic field | EN61000-4-3, Level 4 |
| Immunity | EN61000-4-6, Level 4 |
| Oscillatory wave immunity | EN61000-4-5, Level 3 |
| EFT | EN61000-4-12, Level 4 |
| Magnetic field variation immunity | EN61000-4-8, Level 4 |
|   |   |
| **•****Safety Certificates** |
| Anti-shock/drop/vibration | IEC60068-2-27/IEC60068-2-32/IEC60068-2-6 |
| Electric power | DC500V set on communication lines to ground and power lines to ground, resistance >15MΩ |
| Link Auto-recovery | Built-in hardware watchdog, auto-recovery

 

PPP link detection & auto-recovery

 

ICMP heartbeat link detection & auto-recovery |
| **• ****Configuration** |
|  Configuration Methods | Serial |

The required serial type, RS232 or RS485, must be defined at the time of order.

---

Source: https://shop.marcomweb.it/en/gsm-gprs-modem/industrial-gsm-cellular-modem-indtu-332

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.