N4KTF32 A 0-1024℃ 32CH K Thermocouple Ultra-wide Temperature Collector RS485 Analog Remote IO Board Thermocouple-to-Digital Converter

N4KTF32 is the 32CH RS485 K-type Ultra-wide thermocouple collector developed and produced for the first time by eletechsup. Through this module, the temperature value of the K thermocouple can be converted into a digital quantity and transmitted through RS485. If the accuracy requirements are not high, you can use version A. If the accuracy requirements are high, it is recommended to use version B.

Function:
A version module:
Power supply : DC 7-25V (Recommended 12V 24V)
Working current: 20-30MA
Temperature measurement channel: 32
Temperature measurement chip: MAX6675ISA+
Temperature measurement range: 0-1024℃
Resolution: 12 bits, 0.25℃ resolution
Accuracy: The thermocouple has an accuracy of ±4℃( 0℃ to +700℃),Accuracy is poor.
MODBUS RTU protocol, 03/04 read command, 06/16 write command.
RS485 bus interface, Default baud rate 9600BPS
Compatible sensor: K-type thermocouple
Dimensions: 285 X 106 X 40MM(With DIN Housing)
Weight: 430grams(With DIN Housing)
 
B version module:
Power supply : DC 7-25V (Recommended 12V 24V)
Working current: 20-30MA
Temperature measurement channel: 32
Temperature measurement chip: MAX31855KASA+
Temperature measurement range: -200℃ to +1350℃
Resolution: 14 bits, 0.25°C resolution
Accuracy: The thermocouple has an accuracy of ±2℃( -200℃to +700℃),Accuracy is relatively good.
MODBUS RTU protocol, 03/04 read command, 06/16 write command.
RS485 bus interface, default baud rate 9600BPS
Compatible sensor: K-type thermocouple
Dimensions: 285 X 106 X 40MM(With DIN Housing)
Weight: 430grams(With DIN Housing)

NOTE!!!
The K thermocouple acquisition port is easily damaged, please do not input a voltage greater than 3V, and please prevent static electricity. If the acquisition port is damaged, it can be repaired by replacing the MAX6675ISA+/MAX31855KASA+ IC.

How to use:
1 Connect the power port to the power supply (DC 12V recommended)
2 Connect to RS485 bus
3 Connect the K thermocouple probe
4 Power-on test


Note: The module will restore factory settings and automatically restart after the RES port is short-circuited for 5 seconds.
For protocol details, please refer to the ''N4KTF32 Modbus RTU Protocol''

All states are mapped into 4xxxx range registers. The user can monitor the input and output status of the module by reading or modifying the value of the 4xxxx interval register (03 06 16 function code)