TM-485 Series - Advanced Temperature Sensor Converters for Photovoltaics

Details

Both TM3-485 PRO and TM4-485 share the following characteristics:

Dual input channels for flexible temperature monitoring:
- Option to measure two points of module temperature
- Alternatively, measure one module temperature and one ambient temperature
RS-485 Modbus RTU output for reliable, long-distance signal transmission ( at least 600m)
Robust design for outdoor use:
- IP67-rated coated grey aluminum casing
- Resin conformal coating for enhanced protection
Wide operating temperature range : -40 ÷ 125 °C toll. ± 0.2° C
Shielded cable for improved signal integrity
Compatibility with various monitoring systems (e.g., Smartlogger 3000, Sungrow Ermes, Higeco, Envolve)
Fast response to temperature changes : < 5 seconds for increasing temperature; < 25 seconds for decreasing temperature
Strong adhesion to surfaces with low surface tension (e.g., Tedlar)
Measurement precision above the required standards of a PT100 class A sensor;

Compatible with any PT100 or PT1000 temperature sensor (2, 3, or 4-wire configuration)
Reference standard IEC 60751
High-precision measurements:
- Overall precision: ± 0.2°C
- Precision of the T.sensor: Depending by the PTC. With TM3 prec.± 0.15ºC
- Dedicated 16-bit converter for enhanced accuracy
Wider temperature measurement range:
- Sensor 1: -40°C to +110°C, toll. ± 0.2 °C
- Sensor 2: -30°C to +110°C, toll. ± 0.2 °C
Ideal for applications requiring high-precision temperature measurements

Uses a proprietary silicon temperature sensor
Moderate precision measurements:
- Overall precision: ± 2.2°C
- Precision of the T.sensor: ± 2.2ºC
Measured value for sensor 1 & 2: -30 ÷ +85 °C toll. ± 3 °C
Factory calibrated using Texas Instruments precision sensors

Sensor Type:
- TM3-485 PRO: Compatible with any PT100 or PT1000 sensor
- TM4-485: Uses a proprietary silicon sensor
Overall Precision:
- TM3-485 PRO: ± 0.2°C
- TM4-485: ± 2.2°C
Temperature Range:
- TM3-485 PRO: Wider range (-40°C to +110°C for Sensor 1)
- TM4-485: -30°C to +85°C for both sensors
Calibration:
- TM3-485 PRO: with 2 reference points using precision reference resistances
- TM4-485: Each TM4 is made by a T.I, Instrument sensor factory calibrated

The TM-485 series is ideal for:

Select the TM3-485 PRO for:
- Applications requiring high-precision measurements
- Compatibility with existing PT100 or PT1000 sensors
- Wider temperature range requirements
Choose the TM4-485 for:
- General-purpose temperature monitoring in photovoltaic systems
- Applications where moderate precision is sufficient
- Scenarios benefiting from factory-calibrated sensors

Product Names: TM3-485 PRO and TM4-485 (Temmeter-485)
Output: RS-485, standard Modbus RTU protocol
Signal Distance: At least 600 m
Non-linearity: ≤ 0.3%
Supply Voltage: 8 – 30 V, DC consumption < 0.06 A (protected against reverse polarity and overvoltage)
Power Consumption(@ 12V): 0.1 W
Encapsulation: Resin conformal coating
Casing: IP67 – Coated grey Aluminium
Connectors:
- INPUT: M12 – 8 Pin FEMALE, M8-3 pin female
- OUTPUT: M8 - 4 Pin MALE
Dimensions: 97 x 64 x 34 mm
Operating Humidity: 0 to 95% RH
Weight: 200 g