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The Industrial 4G Wireless Cellular RTU S271 features 4 digital inputs, 4 analog inputs, 4 relay outputs, 1 temperature and humidity input. The RTU supports Modbus RTU over TCP, Modbus TCP, MQTT protocol.
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.
Model DIN AIN Relay TH SD Card Extend I/O tags/Mapping registers Port
Boolean 16-Bit 32-Bit 64-Bit
S270 2 2 2 1 × × × × USB
S271 4 4 4 1 × × × ×
S272 8 6 4 1 8G 64 64 × × USB/RS485
S275 8 6 4 1 8G 64 128 64 64
Notice 1.Default version is GSM/GPRS module inside.
2.For 3G WCDMA, 4G LTE version, please tell our sales where would you like to use them.
Item Reference Scope
DC Power supply Standard adapter: DC 12V/2A Range 9-36VDC
Power consumption Standby:12V/50mA; Working Max.: 12V/150mA
GSM Frequency 850/900/1800/1900Mhz
3G/4G Optional: WCDMA/TDD-LTE/FDD-LTE
TCP/IP stack TCP, UDP
SIM interface Supporting 3V and 1.8V SIM Card
External antenna SMA Antenna interface, 50 Ohm, Gain: 3dB
Serial Interfaces 1 USB Port
Protocols SMS, GPRS UDP, TCP, MQTT, Modbus RTU over TCP and King Pigeon RTU protocol.
Digital Inputs 2/4 Digital input, NC/NO type, All can be used as Pulse Counters; DI0 as a high-speed pulse counter, sampling frequency: 1MHz;
DI1~3 as a low-speed pulse counter, the anti-shake time can be set to 1~2000ms, the default is 1ms;
DI1 as arm and disarm function;
Isolation protection:2KVrms
Analog Inputs 2/4 Analog Inputs. 12 bit resolution, 0-5V or 0-20mA or 4-20mA;
Input resistance:>1M ohms
Temp.&Hum Inputs Temperature range: -40°C to +80°C, Humidity Range: 0~100%RH;
Relay Outputs 2/4, Rated: 5A/30VDC, 5A/250VAC
Isolation protection:2KVrms
Power Outputs 1 Port, for external device;
Backup Battery 3.7V 900mAH
Temperature range -20-+70 °C
Humidity range Relative humidity 95% (condensation free)
Exterior dimension 140mm*88mm*30mm
Net Weight 350g
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