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Item specifics
  • Model Number: S273
  • Brand Name: KING PIGEON
  • GSM Remote Control Alarm DC Power supply: Standard adapter: DC 12V/1.5A Range 9-36VDC
  • GSM Remote Control Power consumption: Standby:12V/70mA; Working Max.: 12V/300mA
  • GSM Remote Control Alarm Frequency: 850/900/1800/1900Mhz
  • GSM Remote Control GPRS connectivity: GPRS multi-slot class 10
  • GSM Remote Control Alarm TCP/IP stack: TCP,UDP
  • GSM Remote Control Alarm SIM interface: Supporting 3V SIM Card
  • GSM Remote Control External antenna: SMA Antenna interface, 50 Ohm
  • GSM Remote Control Serial Interfaces: 1 USB Port
  • GSM Remote Control Alarm Digital Inputs: 8 Digital input, NC/NO/Edge/Level type, Can be used as Pulse Counters
  • GSM Remote Control Alarm Analog Inputs: 6 Analog Inputs. 12 bit resolution, 0-5V or 0-20mA or 4-20mA
Product Description


GSM Remote Control Alarm Temperature Humidity Monitoring BTC SMS 3G GPRS

Communication 64 Register S273 M2M RTU Controller Unit


This price is for 2G version, if you need 3G version, extra cost $20. Conatct us for 3G one!

1.The GSM 3G M2M RTU is a multi I/O port remote terminal unit, through the RS232/485 port can extend up to 64 additional I/O or connect

intelligent meters or PLC. It is special for BTS monitoring, remote data acquisition, telemetrically, BTS access control and other applications.

It supports voice communication, SMS, GPRS, 3G communications.

2.The GSM 3G M2M RTU can be used as remote access control; the authorized users can open the gate or turn on the machine with a free

charge call at specified time.



1.      ARM® Cortex™-M4 32 Bit RISC Core, 168 MHz inside, RTOS system;

2.      Widely Rated voltage range, 9~36VDC, Inbuilt large capacity rechargeable backup battery;

3.      2G SD card for save historical data, USB port for configuration and upgrade firmware;

4.      6 analog inputs, 12bits, supports 0-5V, 0-20mA, 4-20mA;

5.      4 Relay outputs, 5A/30VDC,5A/250VAC;

6.      8 digital inputs, dry contact or level input. One of the input can be used as counter;

7.      1 temperature probe input, 1 humidity transducer input;

8.      I/O ports with opto-isolated, RS232/485 with 15KV ESD protection;

9.      2 IP data centers, supports Modbus TCP,TCP/IP protocol over GPRS/3G network;

10.   RS232/RS485 can performs Modbus RTU Master, Modbus RTU Slave, supports 01,02,03,04,05 code, up to 64 registers,

the register arise alarm also can send SMS to alert;

11.   RS232/485 can be used as data transparent transmission for different intelligent meters or PLC;

12.   Automatically resend the data while communication failure, GPRS failure will alert by SMS text;

13.   Supports remotely restart the RTU, and configure it by SMS commands remotely;

14.   Supports over voltage protection and phase-reversal protection;

15.   10 SMS Alert and auto dial numbers, can program to receive specified alarm message.

16.   10 access control authorized numbers, can open the BTS door or turn on/off machine with a free charge call at the specified time.





Reference Scope

DC Power supply

Standard adapter: DC 12V/1.5A  Range 9-36VDC

Power consumption

Standby:12V/70mA;  Working Max.: 12V/300mA

GSM Frequency


Transmit power

Class 4 (2W) at EGSM 900 and EGSM 850

Class 1 (1W) at GSM 1800 and GSM 1900

GPRS connectivity

GPRS multi-slot class 10

GPRS Data Transmission

GPRS data downlink transfer: max. 85.6 kbps

GPRS data uplink transfer: max. 42.8 kbps

Coding scheme: CS-1, CS-2, CS-3 and CS-4

TCP/IP stack


SIM interface

Supporting 3V SIM Card

External antenna

SMA Antenna interface, 50 Ohm

Serial Interfaces

1 USB Port;


SMS, GPRS UDP,TCP, Modbus RTU, Modbus TCP and more equipment protocols can be added according to requirements.


1 RS232 and 1 RS485, Support Transparent transmission and Modbus RTU Master, Modbus RTU Slave.

Digital Inputs

8 Digital input, NC/NO/Edge/Level type, Can be used as Pulse Counters;

Analog Inputs

6 Analog Inputs. 12 bit resolution, 0-5V or 0-20mA or 4-20mA;

Temp.&Hum Inputs

Temperature range: -40°C to +80°C.

Humidity Range: 0~100%RH;

Relay Outputs

4, Rated: 5A/30VDC,5A/250VAC

Power Outputs

1 Port, for external device;

Memory Capacity

Internal Memory inside, can save the data for 1000events.

Backup Battery

3.7V 1200mAH

Temperature range

-10-+70 °C

Humidity range

Relative humidity 95% (condensation free)

Exterior dimension


Net Weight

1000 g


Standard Package list:

S273 2G M2M RTU Controller unit  *1

AC/DC Power adapter *1 (AC100~240V to DC 12V/2A, UK/USA/EU/AU plug available)

CD (PC Programming tool and User Manual)  *1

GSM Antenna *1

Connectors *1 set


Optional Accessories:

Water Overflow Level Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor,

Glass Break Sensor, Shock Sensor, Power failure sensor, etc.


Packaging Details
  • Unit Type: piece
  • Package Weight: 1.0kg (2.20lb.)
  • Package Size: 15cm x 12cm x 10cm (5.91in x 4.72in x 3.94in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 1.0kg (2.20lb.)
  • Package Size: 15cm x 12cm x 10cm (5.91in x 4.72in x 3.94in)
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