News: New product 8-Way 1-Wire DS18B20 Digital Temperature Sensor Modbus RS485 Analog IO Module For PLC Paperless Recorder Thermostatic Controls N4DSC08
The N4DSC08 is an upgraded 8-channel RS485 DS18B20 temperature logger designed by eletechsup. Compared to the previous version, it features several improvements. For example, by configuring the ''Sensor probe mode'' register, it can adapt to sensors of varying lengths and specifications, making it compatible with DS18B20 sensors from a wider range of manufacturers.
Working voltage: Power Supply DC 7-25V;
Working current: 10-18MA
Number of acquisition channels: 8 channels
MODBUS RTU protocol, 03, 04 read commands, 06, 16 write commands.
Serial port baud rate: 9600 (default), 1200-115200,N, 8, 1
By modifying the RS485 address, up to 247 modules can be cascaded (more than 16 please use R485 repeater)
Adapted sensor: DS18B20 Temperature Sensor
Temperature measurement range: -55°C to +125°C(-67°F to +257°F)
Size: 75 *50 * 14mm(Only Board),80 *54 * 26mm(With DIN housing)
Weight: 36g(Only Board) ,66g(With DIN housing)
In order to collect temperature more stably, it is recommended that the cable length of the DS18B20 probe should not exceed 15 meters.
1 For probes less than or equal to 5 meters, the default settings can be used
2 When the probe cable is greater than 5 meters, data can be collected correctly under normal circumstances. However, some manufacturers' sensors are incompatible and cannot collect data correctly.
The following modifications can be made:
1 Set the 0X00F3 register to 1.
2 Change the RA1/RA2 resistor to 3.9K or 2.7K resistor.
Pin description:
VCC: Positive power supply
VCC: Negative power supply
A+: RS485 A+ port
B- : RS485 B- port
5V: DS18B20 positive power supply
GND: DS18B20 negative power supply
D1: CH1 DS18B20 DATA
D2: CH1 DS18B20 DATA
D3: CH1 DS18B20 DATA
D4: CH1 DS18B20 DATA
D5: CH1 DS18B20 DATA
D6: CH1 DS18B20 DATA
D7: CH1 DS18B20 DATA
D8: CH1 DS18B20 DATA
