
Model | DI | AI | DO | Tem& Hum | Storage | USB | RS485 | I/O data points | |||
bool | 16Bit | 32Bit | 64Bit | ||||||||
S270 | 2 | 2 | 2 | 1 | 2M | 1 | x | x | x | x | x |
S271 | 4 | 4 | 4 | 1 | 2M | 1 | x | x | x | x | x |
S272 | 8 | 6 | 4 | 1 | 32G | 1 | 1 | 64 | 64 | x | x |
S274 | 4 | x | 4 | 1 | 32G | 1 | 1 | 64 | 128 | 64 | 64 |
S275 | 8 | 6 | 4 | 1 | 32G | 1 | 1 | 64 | 128 | 64 | 64 |

The remote monitoring module is designed for remote measurement and control system and remote data acquisition telemetry systems, such as smoke, liquid, water, flow, flood, electricity, power, energy remote monitoring and remote control.
When alarm occurs, the RTU will notify users by SMS, dialing, and also uploading data to cloud platform, monitoring center. The RTU also can be used as a remote switch, remote I/O, remote smart PLC, timer switches.






Category | Parameter | Description |
Power | Input Voltage | DC 12~36V |
Power Consumption | Normal: 50mA@12V, Max: 150mA@12V | |
Output | 1 Channel; Voltage: 12~36V DC; Current: 1500mA@12V(Max) | |
Protection | Reverse wiring prevention; Surge: 4KV | |
Backup Battery | 3.7V/850mA (It is optional. Default: Without battery) | |
USB | USB | 1xMini USB |
Digital Input | QTY | 4 Channel |
Type | Support both Wet contact and Dry contact | |
Dry Contact | Close: Short circuit; Open: Open circuits | |
Wet Contact | Close: 10~30V; Open: 0~3V | |
Others | DIN0 as a high-speed pulse counter, sampling frequency: 1MHz; DIN1~3 as low-speed pulse counter, anti-shake time can be set 1~2000ms, default 1ms; DIN1 with arm and disarm function; | |
Protection | 2KVrms | |
Digital Output | QTY | 4 Channel |
Type | Relay output (5A@30VDC, 5A@250VAC) | |
Others | The first DO can set time to control by authorize number; Custom setting close and open times | |
Protection | 2KVrms | |
Analog Input | QTY | 4 Channel |
Type | Single-ended input, 4-20mA/0-20mA/0-5V | |
Resolution | 12Bit | |
Accuracy | ±0.1% FSR @ 25°C ±0.3% FSR @ -10 and 60°C ±0.5% FSR @ -40 and 75°C | |
Sampling Rate | 200ms | |
Input Impedance | >1M ohms | |
Temperature&Humidity (AM2301) | Resolution | 16bit(0.1%RH, 0.1°C) |
Sampling Rate | 200ms | |
Temperature Range | -40 to +80°C | |
Accuracy | 0.5°C | |
Humidity Range | 0 to 99RH% | |
Accuracy | 3%RH | |
4G | SIM | Drawer type, Support 1.8V/3V SIM/UIM card, Built-in 15KV ESD protection |
SIM Slot | 1 | |
L-E Version | GSM/EDGE:900,1800MHz WCDMA:B1,B5,B8 FDD-LTE:B1,B3,B5,B7,B8,B20 TDD-LTE:B38,B40,B41 | |
L-CE Version | GSM/EDGE:900,1800MHz WCDMA:B1,B8 TD-SCDMA:B34,B39 FDD-LTE:B1,B3,B8 TDD-LTE:B38,B39,B40,B41 | |
L-A Version | WCDMA:B2,B4,B5 FDD-LTE:B2,B4,B12 | |
L-AU Version | GSM/EDGE:850,900,1800MHz WCDMA:B1,B2,B5,B8 FDD-LTE:B1,B3,B4,B5,B7,B8,B28 TDD-LTE:B40 | |
L-AF Version | WCDMA:B2,B4,B5 FDD-LTE:B2,B4,B5,B12,B13,B14,B66,B71 | |
CAT-1 Version | GSM:900,1800 FDD-LTE:B1,B3,B5,B8 TDD-LTE:B34,B38,B39,B40,B41 | |
Software | Internet Protocol | IPV4, TCP/UDP, Modbus RTU, Modbus TCP, MQTT, BLIIoT IoT RTU |
Indicator | 4G signal, running, arming and disarming | |
Configuration | PC software configuration, support WIN XP, WIN 7, WIN 8 and WIN 10 | |
Transparent Transmission | Support | |
SMS Command | Support | |
Login Package | Support custom login package | |
Heartbeat Package | Support custom heartbeat package | |
Storage | Capable of storing up to 200 historical records | |
Environment | Working | -45~85°C, 5~95% RH |
Storage | -45~105°C, 5~95% RH | |
Others | Shell | Metal |
Size | 127x88x30mm | |
Protection | IP30 | |
Installation | DIN Rail mounting, Wall-mounted. |

Start Your Digital Transformation with BLIIoT
Founded in 2005, Beilai Technology is an innovative manufacturer dedicated to the development and manufacturing of Industrial IoT, Industrial Edge Computing, Industrial Automation Data Acquisition and Communication devices. Beilai is the pinyin of barium-rhenium in Mandarin.
Barium is a lively element, and rhenium is the last element discovered by human beings.
The meaning of barium-rhenium is to be brave in innovation and explore the most cutting-edge technology.
Beilai-Original&Reliable IoT Products Manufacturer
Beilai offer partners with a wide range of hardware including IIoT Gateways, Protocol Converters, Distributed I/O System, Ethernet I/O Modules, Remote I/O, ARM Industrial Computer, 4G IoT M2M RTU, 4G Edge Router, Remote Battery Measurement Module, Cellular SMS Controller, Network Fault Monitoring Alarm, Cellular Gate Opener, OEM and ODM services.

