OHR-M22 Din Rail Mounted Temperature Transmitter

OHR-M22 Din Rail Mounted Temperature Transmitter isolate the resistance temperature detector (RTD) or thermocouple (TC) signals on-site, amplify them, and convert them into temperature linear DC signals, and export to the control system, and when used as a TC temperature transmitter, it has automatic cold junction temperature compensation function. It can change parameters with a supporting PC software. It can be used together with modular instrumentation and DCS, PLC and other systems, to offer signal isolation, signal conversion, signal distribution, signal processing and other functions to field instrument, thereby enhancing the immunity of automatic control system in the industrial production process, and ensuring system stability and reliability. This product has many varieties, such as 1 in/1 out, 1 in/2 out, 2 in/2 out, with input/output magnetic isolation.

Contact us

Features

  • Full switching of temperature signal
  • Using photoelectric isolation technology
  • RS485 communication interface
  • Relay alarm output
  • Low power consumption and low heat generation
  • Support transmission output
  • Smart appearance and high cost performance
  • Transmission accuracy: 0.2%FS (20°C)
  • I/O/power isolated from each other

 

Applications

  • Detection, conversion and transmission of temperature in industrial automation control
  • In the field of environmental monitoring, the measurement and transmission of atmospheric temperature, water temperature, ground temperature and other parameters are realized
  • Used in weather stations, hydrological stations, geological exploration and other fields
  • In the field of medical equipment, it realizes the monitoring and transmission of patient body temperature.
  • Applied to the cold chain logistics industry to monitor and record the ambient temperature of logistics vehicles and cold storage

 

Specification

Input
Input signal 2-wire/3-wire RTD, TC (Signal type and measuring range can be programmed via supporting PC software)
Output
Output signal 4-20mA、0-10mA、0-20mA、0-5V、1-5V
Output load 4-20mA, 0-0mA, 0-20mA load resistance RL≤400Ω;

0-5V, 1-5V load resistance RL≥250KΩ

Power supply
Power supply DC20-32V
Power consumption 1 in/1 out: ≤1W;

1 in/2 out, 2 in/2 out: ≤1.4W

Other parameters
Insulation resistance (between input / output / power supply) ≥100MΩ (500VDC)
Dielectric strength (between input / output / power supply) 1500Vrms (1 min, no spark)
Operating temperature -10~50 °C (no condensation, no freezing)
Relative humidity 25%~85%RH
Storage temperature -10~60 °C (no condensation, no freezing)
Temperature drift 0.0075%FS/℃
Mounting style 35mmDIN rail mounting
Dimensions 13*108*121.2mm (W * H * D)
Transmission accuracy (20 °C) 0.2%FS±1
Minimum resolution 0.1℃
Internal cold junction compensation temperature range -10~50℃
Cold junction compensation accuracy ±1℃
Response time 50ms to reach 90% of the final value
Disconnection output The user can configure through the PC software, and the disconnection output is optional between hold, maximum, and minimum

Hold: When the signal is disconnected or over range, the output will hold on as the output before the disconnection

Maximum: When the signal is disconnected or over range, the output will be default 20.80mA

Minimum: When the signal is disconnected or over range, the output will be default 3.00mA

Weight Approximately 130 g
Electromagnetic compatibility In line with GB / T18268 industrial equipment application requirements (IEC 61326-1)
Field devices applicable 2-wire/3-wire RTD , TC sensor