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The NT18B07 is a 7-channel RS485 NTC thermistor temperature acquisition module commonly used for industrial monitoring and data logging.
A primary feature of the NT18B07 is its Cascading Capability, which allows you to connect up to 247 modules on a single RS485 network by modifying the device's Modbus address. Key Specifications & Features
Multi-Channel Input: Supports up to 7 simultaneous NTC sensor connections (compatible with B3950 10K 1% thermistors).
Communication Protocol: Uses the standard Modbus RTU protocol (supporting function codes 03 and 06) with a default baud rate of 9600.
Measurement Range: Typically measures from -20°C to +125°C with a 1% accuracy level when used with standard NTC sensors. nt18b07 manual
Automatic Reporting: According to the Modbus RTU Protocol Guide, the module can be configured for automatic temperature reporting at intervals ranging from 1 to 255 seconds.
Wide Operating Voltage: Operates on DC 6V to 24V, making it compatible with various power systems (9V, 12V, or 24V).
For detailed wiring and setup, you can refer to the NT18B07 User Manual provided by manuals.plus.
The NT18B07 is a 7-channel RS485 temperature measurement module. It uses the Modbus RTU protocol to communicate with computers or PLCs, allowing you to connect up to seven NTC thermistors (specifically the B3950 10K 1% type) to monitor temperatures across multiple points.
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 morning light didn’t reach the deep corners of the server room, but the NT18B07 didn’t need eyes. It lived in a world of silent pulses and shifting resistances. Securely mounted to its rail, the green PCB felt the steady hum of DC 12V flowing through its terminals. It was known to the master controller simply as Node 01. Provide me with:
Across seven channels, seven thin wires reached out like mechanical nerves into the humming machinery. Channel 1 felt the steady, cool breath of the intake fans.
Channel 4 was pressed against the iron skin of a high-speed transformer, feeling the heat rise as the morning workload began.
Suddenly, the "silence" was broken. A Modbus RTU command flashed across the RS485 bus—a sharp, binary interrogation: 01 03 00 00 00 07 04 08.
“Node 01, identify yourself and report your registers,” the master demanded.
The NT18B07 didn't hesitate. Within milliseconds, its internal processor translated the analog resistance from its thermistors into digital precision.
Channel 4 is creeping toward 85°C, it noted, the accuracy holding steady at ±0.5°C. With that, I can help you find a
It packaged the data—fourteen bytes of critical information—and sent it back up the line at 9600 baud.
The manual diagrams show the following connections (left to right):
Side Panel (Easy Access):
Rear Panel:
A: Unlikely. The manual states the ambient light sensor is not present. Instead, go to Menu > Picture > set Backlight (if available) to 100, and Contrast to 80. Default "Energy Saving" mode often dims the panel excessively.
Most NT18B07 units come pre-set for a 5+2 schedule (Monday–Friday same program, Saturday–Sunday same program). To change the setpoints:
A password will be e-mailed to you