Overview
The Inventory Master’s Cellular IoT M2M RTU with Digital, Analog, and Relay Control is an industrial-class, high-reliability, programmable Remote Terminal Unit (RTU) designed for automation and monitoring applications. This device features a 32-bit high-performance microprocessor MCU and an embedded industrial cellular module. It includes 8 digital inputs, 6 analog inputs, 4 relay outputs, 1 ambient sensor input for temperature and humidity monitoring, and 1 serial port. As a Modbus master, it can connect to expansion I/O modules or read data from instruments, PLCs, and other devices. Users can set high and low limits for different scenarios, and when an alarm occurs, the RTU notifies users via SMS, calls, or uploads data to a cloud platform or monitoring center. This product can also function as a remote switch, remote I/O, smart PLC, or timer controller, allowing operations such as opening gates or turning on machines automatically. It supports IoT RTU, Modbus RTU over TCP, Modbus TCP, and MQTT protocols, enabling seamless communication with servers, cloud platforms, or SCADA systems. This makes it a cost-effective solution for industrial automation, security monitoring, telemetry, remote data acquisition, and automated control systems.
Features
- 4G network communication for remote operation anywhere
- 8 digital inputs and 4 relay outputs with timer and remote control
- Built-in 32G SD card for historical data storage
- Port supporting Modbus slave and master protocols
- SMS alerts, commands, and remote configuration
- Compact metal case with IP30 protection; wall or DIN Rail mounting
Technical Specifications
| Design Style | Modern |
| Feature | Easy operation |
| Application | Industrial |
| Input Voltage | DC 9 to 36V |
| Power Consumption | Normal: 50 mA@12V, Max: 150 mA@12V |
| Output | 1 Channel, 9 to 36V DC, 1500 mA@12V Max |
| Protection | Reverse wiring prevention, ESD Air 15KV, Surge 4KV |
| Backup Battery | Optional 3.7V/850mA |
| USB | 1 x Mini USB |
| Serial Port | 1 x RS485 |
| Serial Data Bit | 8 |
| Serial Parity Bit | None, Even, Odd |
| Stop Bit | 1 or 2 |
| Protocol | Modbus RTU (slave or master) |
| Digital Output | 4 Channels, Relay 5A@30VDC, 5A@250VAC, configurable timing |
| Analog Input | 6 Channels, Differential 4-20mA/0-20mA/0-5V, 12Bit, ±0.1% FSR @25°C, ±0.3% FSR @-10 to 60°C, ±0.5% FSR @-40 to 75°C, Sampling 200ms, Input impedance >1MΩ |
| Temperature & Humidity Sensor | 16Bit, Sampling 200ms, Temp -40 to +80°C (±0.5°C), Humidity 0 to 99% RH (±3%RH) |
| Software Protocols | IPV4, TCP/UDP, Modbus RTU, Modbus TCP, MQTT, BLIIoT IoT RTU |
| Indicator | 4G signal, running, arming/disarming, 485 Tx/Rx |
| Configuration | PC software, supports Windows XP, 7, 8, 10 |
| Slave Connection | Max 16 devices, 320 I/O data points |
| Transparent Transmission | Supported |
| SMS Command | Supported |
| Login Package | Custom supported |
| Heartbeat Package | Custom supported |
| Storage | Built-in 32G SD card, up to 100,000 records |
| Working Temperature | -45 to +85°C (-49 to +185°F) |
| Storage Temperature | -45 to +105°C (-49 to +221°F) |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Product Weight | 1.43 lb (0.650 kg) |
| Size | 4.25in x 3.23in x 1.57 in (108mm x 82mm x 40 mm) |
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