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M340T RTD Input Module

Regular price $209.99 USD
Regular price Sale price $209.99 USD
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M340T - 8RTD Input Module (2 or 3 wires PT100/PT1000)

The M340 Industrial Ethernet Remote I/O module provides 8 RTD inputs, supports PT100 and PT1000 resistance sensor, compatible 2 or 3 wires, the resolution is 0.1°C.


The M340 Industrial Remote I/O Module is an industrial class, exceptionally reliable and very precise data acquisition module it features an embedded 32-Bit High Performance Microprocessor MCU, Integrated 1~2 Industrial 10/100M adaptive Ethernet module inside. It provides multiple I/O, supports standard Modbus TCP, can be intergraded into SCADA, OPC server, and other automation systems. It is designed for working in harsh industrial environments and is widely used in a variety of industrial automation, security monitoring system, automatically measurement and control system. 

The M340 Industrial Ethernet Remote I/O module provides a RS485 interface, through the RS485 bus, it can cascade Modbus RTU I/O devices or Modbus RTU meters, e.g.: a variety of digital input or digital outputs, analog inputs or outputs, thermal resistance IO module combination. At the same time, the Ethernet Remote I/O module has register mapping function, the cascade Modbus RTU I/O data are automatically collected to the mapping memory area, the Modbus TCP Client query without waiting then can get a quick response to meet the industrial timing requirements.


1. Embedded 32-Bit High Performance Microprocessor MCU, built-in watchdog. 
2. Wide range power supply 12 ~ 36VDC with over voltage and phase-reversal protection. 
3. Management and configuration via LAN connection configuration software for effortless operation and maintenance. 
4. Integrated 10/100M adaptive Ethernet module, supports Modbus TCP protocol. 
5. 8 RTD input, supports PT100 and PT1000 resistance sensor, compatible with 2 or 3 wires. 
6. High sampling frequency and special filtering strategy to ensure reliability. 
7. 1 RS485 Serial port, supports Modbus RTU/ASCII Master, can extend I/O modules. 
8. Supports register mapping function and extends I/O inquiry strategy. 
9.Provides 1 channel 12~36VDC power source output for external device, saving wiring cost. 
10.LED instructions work status, with reset button to reset, easy on-site installation and commissioning. 
11.Using metal shell, protection class IP30. Metal shell and system security isolation, especially suitable for industrial applications in the field. 
12.Small size, L105mm (about 4.13 in) * W88mm (about 3.46 in) * H30mm (about 1.18 in), compatible wall installation and DIN35mm (about 1.38 in) industrial rail installation. 



RTD Input

Sensor Type PT100 or PT1000
Resolution 0.1ºC or 0.1ohm
Input Connection 2 or 3 Wire

±0.1% FSR @ 25º C

±0.3% FSR @ -40 and 75º C

Sampling Frequency 20Hz
Isolation No


Working Power Requirements

 Input Voltage

12-36VDC, Peak Voltage +40VDC

Power Consumption: Less than 3W

Input Current
139mA @ 24VDC



Ethernet 10/100Mbps RJ45 ports
Protection 15KV ESD Protection
Protocols Modbus TCP, TCP/IP
Max TCP Connection 5


Serial Port

RS485 MODBUS- RTU Protocol, Modbus-ASCII Protocol
Protection 15KV ESD Protection
Modbus Slave Address 1-255
Baud Rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 128000Bps
Mapping Registers Bit Type: 300 Registers, 16-Bit Type: 300 Registers


Physical Characteristics

Wiring I/O Cable Max. 14AWG
Dimensions 105mm x 88mm x 30mm
Weight Under 205grams
Mounting DIN Rail or Wall


Environmental Limits

Operating Temperature

Standard Model: -10 to 60°C (14 to 140°F)

Wide Temp. Models: -40 to 75°C (-40 to 167°F)

Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Altitude Up to 3000



M340T Data Sheet Download

M340T User Manual



Typical applications: 

  1. BTS Monitoring.
  2. Security Alarm System applications.
  3. Supervision and monitoring alarm systems.
  4. Automatic monitoring system.
  5. Vending Machines security protection.
  6. Pumping Stations, Tanks, Oil or Water levels.
  7. Buildings and Real Estate.
  8. Weather Stations. 
  9. River Monitoring and Flood Control.
  10. Oil and gas pipelines.
  11. 11.  Corrosion protection
  12. Temperatures, water leakage applications.
  13. Wellheads, boats, vehicle.
  14. Energy saving, streetlights control system.
  15. Valve controls.
  16. Transformer stations.
  17. Unmanned machine rooms.
  18. Control room application.
  19. Automation System, M2M.
  20. Access Control System.
  21. 21. PLC Gateway, PLC Remote Monitoring.

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