Smart Temperature Transmitter

OHR-X32 Series Smart Temperature Transmitter

OHR-X32 series smart temperature transmitter can convert the signals of thermal resistance or thermocouple on site, via isolation and amplification processing, into DC signals having a linear relationship with temperature, and output DC signals to the control system, and it has cold junction temperature automatic compensation function when used as a thermocouple temperature transmitter; Moreover, it can be used together with unit combination instrument, DCS, PLC and other systems, for field instrument signal isolation, conversion, distribution and processing and so forth, thus improving the anti-interference capability of industrial production process automatic control system and ensuring the stability and reliability of the system. The isolator may be equipped with a display unit. Pressing the keys gently to set the parameters for each channel and switch the channels.

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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 signal Thermal resistance and thermocouple signal
Output signal 4-20mA, 0-10mA, 0-20mA, 1-5V and 0-5V
Output load 4-20mA, 0-10mA and 0-20mA , load resistanceRL≤500Ω; 1-5V, 0-5V load

resistanceRL≥250KΩ
RS485 communication MODBUS-RTU protocol, RS485 transmission distance≤1,000m, data

transmission rate≤19.2kbps
Power DC/AC20-260V (50/60Hz)
Power consumption Single-input and single-output power consumption: ≤1W, single-input and

double-output and double-input and double-output consumption: ≤1.4W
Insulation resistance

(between input/output/power)

 ≥100MΩ (500VDC hours)
Insulating strength

(between input/output/power)

 1500Vrms (1 min, no spark)
Operating temperature -10～50℃(with no icing or condensation)
Relative humidity 25%～85%RH
Storage temperature -10～60℃(with no icing or condensation)
Temperature drift 0.0075%FS/℃
Installation method 35mmDIN guide rail installation
Installation dimension 17.5*111.4*121.2mm(W*H*D)
Transmission precision (20℃) 0.2%FS±1
Minimum resolution 0.1℃
Internal cold junction temperature

compensation range

 -10～50℃
Cold     junction            compensation

accuracy

 ±1℃
Response time Reach 90% of final value in 50ms
Weight Approximate 140g
Electromagnetic compatibility It should meet industrial equipment application requirements specified in

GB/T18268 (IEC 61326-1)
Applicable field equipment Thermal resistance and thermocouple sensor

 

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