Contain the temperature readings for each channel in 0.1°C increments.
Communication with the NT18B07 requires a Modbus RTU master (such as a PLC, SCADA system, or micro-controller). The device tracks values across distinct Modbus register addresses. Register Memory Map Register Address (Hex) Register Address (Dec) Access Type Description 0x0000 Read-Only ( 03 ) Channel 0 Temperature Reading 0x0001 Read-Only ( 03 ) Channel 1 Temperature Reading 0x0002 Read-Only ( 03 ) Channel 2 Temperature Reading 0x0003 Read-Only ( 03 ) Channel 3 Temperature Reading 0x0004 Read-Only ( 03 ) Channel 4 Temperature Reading 0x0005 Read-Only ( 03 ) Channel 5 Temperature Reading 0x0006 Read-Only ( 03 ) Channel 6 Temperature Reading 0x00FE Read / Write ( 03 / 06 ) Device Slave ID (Default is 1 , Range: 1–247) Reading Data and Parsing Temperatures
Cascading is achieved by connecting multiple NT18B07 modules in parallel on the same RS485 bus. Each unit must have a unique Node ID. Your host device will then poll each unit using its specific address to retrieve data.
DC 6-24V (Recommended: 9V, 12V, 15V, or 24V). Operating Current: 8-15MA. Protocol: MODBUS RTU supporting 03 and 06 function codes. Interface: RS485 (Baud rate: 9600 bps by default, N, 8, 1). nt18b07 manual
A key point for new users is that the module is only a data acquisition device. The NTC sensors themselves, specifically the type, are not included and must be purchased separately. Using a different sensor will result in inaccurate readings.
To avoid bus conflicts, every module on the same bus must have a unique address. Update the Slave ID by executing a Modbus 06 Write command to Register 254 ( 0x00FE ).
Slide the 18V battery into the base until you hear a definitive click. Contain the temperature readings for each channel in 0
The following story personifies this little green circuit board as it navigates its duties in a demanding industrial setting. The Vigil of Node 01
The screw terminal block on the board typically features four to six connection points:
Designed for serial reader protocols, including various supported card standards . Communication Protocol Format Register Memory Map Register Address (Hex) Register Address
The NT18B07 is a 7-channel RS485 Modbus RTU module designed for NTC 10K 3950 thermistors, featuring a default baud rate of 9600 and register-based temperature mapping. It allows monitoring seven temperature points, with data stored in holding registers 0x0000–0x0006 at 0.1°C resolution. For detailed technical specifications, see the documentation at Sming . NT18B07 7-channel NTC temperature interface board - Sming
Prevents users from accidentally setting the target temperature too high. Lowest Lower Limit
00 00 through 00 00 : CH2 to CH5 Readings = 0 (Unconnected or exactly 0°C) E1 22 : Validated Response CRC-16 Checksum 2. Modifying the Module Device Slave ID
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