Page 9 of 74 Shezhen Beilai Technology Co., Ltd V1.1
Cellular IoT M2M RTU --- S272/S274/S275
treated as close, 0~3V or open circuits treated as open. 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;
4 relay output (5A@30VDC, 5A@250VAC), can auto control by timer, alarm-link and remote
control by SMS, cloud. The first DO can set time to control by authorize number;
1 temperature & humidity sensor input for monitoring onsite environment, the sensor model is
AM2301, temperatures range from -40°C to 80°C, with a 0.5°C accuracy, humidity range from 0
to 100RH%, with a 3% accuracy;
6 analog inputs, 12bits resolution, supports 0-5V, 0-20mA, 4-20mA output transducers;
Inbuilt 32G SD card to save up to tens of thousands historical data and events;
1 RS485 port, support Modbus slave protocol, can link up to SCADA, HMI, DSC, PLC. Support
Modbus Master protocol, can connect to 16 Modbus Salve, e.g.: Data Acquisition Module,
meters, generator, PLC, VFD, etc., and 320 tags can set alarm value and content, also support
data transparent transmission;
Powerful SMS function: Threshold high SMS alert, SMS set, SMS inquiry, SMS command for
Modbus PLC, and SMS monitoring communication with Slaves;
Inbuilt 2 DC output for external transducers to save wiring cost;
Automatically resend the data while communication interrupt or failure, and failure will alert by
SMS;
Supports remotely restart. configure and operate by SMS commands;
10 SMS Alert and auto dial numbers for receiving alarm message, can program to receive
specified alarm message. The authorized numbers also can dial to open the door or turn on/off
machine with a free charge call at the specified time;
Inbuilt inter-lock logic programmer and powerful timer program function;
Modular structure, replace a module to upgrade the network from 2G to 3G/4G or 3G to 4G;
Support SMS, dial, GPRS, 3G , 4G network for alert, USB port for configuration and upgrade
firmware;
Inbuilt large capacity rechargeable backup battery, which is able to alert when external power
failure;
Support TCP/UDP, MQTT, Modbus TCP, Modbus RTU over TCP, BLIIoT IoT RTU protocol and
data transparent transmission;
