The PTA8E16 is a 16-channel PT100 temperature acquisition module designed for multi-point temperature monitoring through an RS485 network. It supports both 2-wire and 3-wire PT100 RTD sensors and communicates using the standard Modbus RTU protocol.
With support for up to 16 PT100 sensors simultaneously and a measurement range of -40°C to +220°C, the module is ideal for industrial automation, PLC systems, control cabinets, warehouses, HVAC systems, and other applications requiring reliable multi-zone temperature monitoring.
Key Features
- 16 independent PT100 input channels
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Temperature range: -40°C to +220°C
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Supports 2-wire and 3-wire PT100 sensors
- RS485 communication interface
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Standard Modbus RTU protocol
- Reads temperature and PT100 resistance values
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Wide DC 8–30V operating voltage
- Suitable for 12V and 24V systems
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Up to 247 addressable modules
- Configurable RS485 device address
- Suitable for DIN rail installation
- Designed for industrial multi-point temperature acquisition
Module Specifications
| Specification |
Details |
| Model |
PTA8E16 |
| Input Channels |
16 |
| Sensor Type |
PT100 RTD |
| Sensor Wiring |
2-Wire / 3-Wire |
| Temperature Range |
-40°C to +220°C |
| Temperature Measurement Accuracy |
1% |
| Operating Voltage |
DC 8–30V |
| Recommended Supply |
DC 12V / 24V |
| Working Current |
14–25mA |
| Communication Interface |
RS485 |
| Protocol |
Modbus RTU |
| Default Baud Rate |
9600 bps |
| Serial Configuration |
8 Data Bits, No Parity, 1 Stop Bit (8N1) |
| Read Command |
Modbus Function 03 |
| Write Commands |
Modbus Function 06 / 16 |
| Maximum Addressable Modules |
Up to 247 |
| Dimensions |
136 × 92 × 32mm |
Note: For RS485 networks with more than 16 modules, an appropriate RS485 repeater is recommended.
16-Channel PT100 Temperature Monitoring
The PTA8E16 allows up to 16 PT100 sensors to be connected to a single acquisition module.
Each channel can be used to monitor a separate temperature point, making the board suitable for large systems where several areas, machines, tanks, rooms, or processes need to be monitored simultaneously.
The system can read:
- Temperature values
- PT100 resistance values
RS485 Modbus RTU Communication
The module communicates through RS485 using the Modbus RTU protocol, allowing easy integration with industrial controllers and monitoring systems.
Supported Modbus functions include:
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Function 03: Read registers
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Function 06: Write single register
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Function 16: Write multiple registers
Default communication settings:
9600 baud, 8 data bits, no parity, 1 stop bit (8N1).
By changing the RS485 address, multiple modules can operate on the same communication bus.
PT100 Sensor Specifications
When supplied with the compatible PT100 probe:
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Sensor Type: PT100
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Temperature Range: -40°C to +220°C
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Probe Diameter: 6.5mm
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Probe Length: 30mm
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Probe Material: Stainless Steel
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Cable Length: 0.5m
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Cable Sheath: PTFE
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Wiring: 3-Wire
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Nominal Sensor Accuracy: 0.1%
The stainless-steel probe and PTFE cable provide good durability for industrial and general-purpose temperature measurement applications.
DIN Rail Enclosure
The module can be installed using a UM80 DIN rail enclosure, making it suitable for electrical cabinets and industrial control panels.
DIN Rail Box Specifications
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Model: UM80
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Color: Green
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Suitable PCB Width: Approx. 80mm
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Suitable PCB Length: Up to approximately 210mm
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Flame-Retardant Rating: V-0
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Installation: DIN35 / C45 Rail
Applications
Suitable for:
- Industrial automation
- PLC temperature monitoring
- Multi-point temperature acquisition
- HVAC systems
- Thermostatic control
- Factory equipment
- Industrial control cabinets
- Warehouse temperature monitoring
- Server and computer rooms
- Indoor and outdoor temperature monitoring
- Agricultural and greenhouse monitoring
- Measuring instruments
- Data acquisition systems
- Thermally sensitive equipment
- Remote temperature monitoring
The PTA8E16 16-Channel PT100 to RS485 Acquisition Board provides a practical solution for collecting multiple PT100 temperature measurements through a single Modbus RTU network.
