Multi-PT1000 Modbus Converter
The 3S-MC-M-PT1000 is a converter that integrates multiple PT1000 temperature sensors into a single device and transmits their measurements digitally via an RS485 line using the Modbus RTU protocol. Up to 8 PT1000 sensors can be connected to a single converter. This allows module temperatures at different points on panels or various ambient temperatures in the area to be read from a single point without the need for separate lines.
The device is designed for environmental and industrial applications such as PV plants, and transmits all measured temperature data to data loggers and monitoring units.
Technical Specifications of Multi PT1000 Modbus Converter
| Technical Specifications | 3S-MC-M-PT1000 | 3S-MC-M-PT1000-3T |
| Measured Data | Up to 8 Module or Ambient Temperature Sensors | Up to 3 Module or Ambient Temperature Sensors |
| Connectable Sensor Type | PT1000 | |
| Measurement Range | -40°C…+85°C | |
| Accuracy | ±0,1°C | |
| Resolution | 0,1°C | |
| Output Rate | 1/s | |
| Data Output | RS485 up to 38400 Baud | |
| Communication Protocol | Modbus RTU | |
| Power Supply | 12…30 V DC (24 V DC recommended) | |
| Power Consumption | 25 mA max. @ 24 V DC | |
| Cable Length and Features | 3 m, 2x2x0.22 mm², 24 AWG, LI2YC11Y-TP PUR cable, UV and weather resistant, cable bending radius 35 mm* | |
| Galvanic Isolation | 1000 V between power supply and RS485 Bus | |
| Operating Temperature Range | -40°C…+85°C | |
| Operating Humidity Range | 0…100% RH | |
| Dimensions | 92 × 158 × 60 mm (W × L × H) | |
| Weight | 240 g | |
| IP Rating | IP67 | |
| Material | ABS | |
| Origin | Türkiye | |
What is a Multi PT1000 Modbus Converter Used For?
The PT1000 is a resistive temperature sensor (RTD) that measures temperature with high accuracy. However, the output of a raw PT1000 is an analogue resistance value. It cannot be connected directly to a data logger or SCADA system. Furthermore, if there are numerous temperature points in a field, wiring and reading each one individually is cumbersome.
The 3S-MC-M-PT1000 solves both of these problems at once. It connects multiple PT1000 sensors to a single device, converts measurements into temperature values, and presents them all digitally over a single Modbus RTU line. This allows numerous temperature measurements to be collected at a single point and easily integrated into the system.
Temperature Control for Up to 8 Channels on a Single Line
In a solar power plant, temperature is one of the most important factors directly affecting production. The back surface temperatures of different panels, or the ambient temperatures in different areas of the site, can vary. To observe these differences, measurements need to be taken at multiple points.
With the 3S-MC-M-PT1000, you don’t need to install a separate converter or communication line for each of these measurements. Up to 8 PT1000 sensors can be connected to a single converter, and all temperature values are read from the same Modbus line. This simplifies cabling and reduces costs.
What are the Models of SEVEN Multi PT1000 Modbus Converter?
The converter is offered in two models, depending on the number of sensors you will connect.
| Model | Number of PT1000 ports that can be connected |
| 3S-MC-M-PT1000 | 8 |
| 3S-MC-M-PT1000-3T | 3 |
Why Choose the SEVEN Multi PT1000 Modbus Converter?
The main advantages of the SEVEN Multi PT1000 Modbus Converter are listed below.
- Multiple sensors on a single line: Combines up to 8 PT1000 sensors into a single converter, simplifies cabling and integration.
- Analog to digital: Converts PT1000 measurements to Modbus RTU, preventing signal loss over long distances and connecting directly to PLCs, SCADA systems, and data loggers.
- Selectable sensor type: Sensor configuration can be adjusted according to your installation.
- Designed for field use: With IP67 protection rating and UV-resistant cable, it withstands harsh outdoor conditions.
- Backed by SEVEN: Comes with remote installation service, free software updates and a 2-year warranty.
How to Install and Connect SEVEN Multi PT1000 Modbus Converter?
The converter connects to the data logger via Modbus RTU over RS485. Please pay attention to the following points during installation.
- Connect the PT1000 sensors to the corresponding inputs on the converter.
- Connect the RS485 cable (Data+, Data-, and data ground) to an RS485 port on the data logger.
- Power the device with 12 – 30 V DC. 24 V DC is recommended.
- Separate the power and communication cables from the AC/DC power lines.
Frequently Asked Questions (FAQ)
What is the purpose of the 3S-MC-M-PT1000?
It integrates multiple PT1000 temperature sensors into a single device, converts measurements into temperature values, and transmits them digitally via Modbus RTU.
How many sensors can I connect to SEVEN Multi PT1000 Modbus Converter?
Up to 8 PT1000 sensors can be connected to the standard model. The 3S-MC-M-PT1000-3T model can connect 3 sensors.
Which sensors can I connect to SEVEN Multi PT1000 Modbus Converter?
It works with SEVEN Ambient and Module Temperature Sensors.
Which output and protocol does SEVEN Multi PT1000 Modbus Converter use?
It uses Modbus RTU (up to 38400 Baud) over RS485.
What supply voltage is required for SEVEN Multi PT1000 Modbus Converter?
It operates with 12-30 V DC. 24 V DC is recommended.
What is the protection class of SEVEN Multi PT1000 Modbus Converter?
It has an IP67 protection rating.
What is the warranty period of SEVEN Multi PT1000 Modbus Converter?
SEVEN offers two-year warranty for each product.
What is the delivery time for SEVEN Multi PT1000 Modbus Converter?
For small orders delivery time is 2-3 weeks. For bulk purchases above 100 units, it is between 8-10 weeks.
What is the unit price of the SEVEN Multi PT1000 Modbus Converter?
The price of the model varies between 123-380 EUR.