Brand Name:icchipcn.com
Condition:New
Type:Drive IC
Model Number:PD3061-NTC
Supply Voltage:DC8-30V
Operating Temperature:-35 to +50
Model:PD3061-NTC
Decoration and construction contents:Hydropower project
Summary
The interface is fully protected, accidentally touching the 24V, and even 220V communication, will not be damaged.
Communication, collection, power supply, the three part is completely isolated.
Main features
Temperature
acquisition module based on RS485 interface and Modbus protocol. Isolated RS485
interface, supports Modbus-RTU protocol.
The
temperature calculation is completed inside the module, and the temperature
value can be directly read in degrees Celsius.
All
module interfaces have protection components, and the measurement end is
isolated from the power supply to protect the interface chip.
Power
supply: DC 8-30V. The measured power consumption of 30V is 9mA, the power
consumption of 24V is 12mA, the power consumption of 12V is 23mA, and the power
consumption of 8V is 33mA.
It
adopts standard 35mm rail installation. Dimensions: 88*72*59
Working
temperature: -35℃～+50℃.
Application
field: liquid and gas temperature measurement field, usually NTC temperature
measurement range is -40℃-150℃.
Accuracy 0.1℃.
PD3061-NTC
NTC resistance temperature acquisition module:
It
supports various NTC resistance temperature measurement, and the corresponding
relationship between temperature and resistance value is calculated by the
following formula:
Rt
= R *EXP(B*(1/T1-1/T2))
The
above formula is explained as follows:
1.Rt
is the resistance value of the thermistor at T1 temperature; 2.R is the nominal
resistance value of the thermistor at normal temperature T2; 3.B value is an
important parameter of the thermistor;
4.
EXP is the n power of e;
5.
Here T1 and T2 refer to K degrees or Kelvin temperature, K degrees = 273.15
(absolute temperature) + degrees Celsius;
For
example: an NTC thermistor with a nominal resistance value of 5K at 25 degrees
and a B value of 3470K has R=5000, T2=273.15+25, B=3470, RT=5000*EXP(3470*(1/T1
-1/(273.15+25)),
At
this time, the resistance value of the thermistor at the corresponding
temperature can be obtained by substituting the temperature of T1. Therefore,
by measuring the resistance value of the NTC, the current temperature can be
obtained by reverse deduction.
NTC
has 2 important parameters: The following software is required to write
parameters into the module.
R25:
is the zero power resistance value at 25°C. Unless otherwise specified, it is
the nominal resistance of the NTC.
B
value: is the thermal index, which is defined as the ratio of the difference
between the natural logarithms of zero-power resistance values at two temperatures and the
difference between the reciprocals of the two temperatures.
2 pictures and interfaces
A: RS485 serial
communication A
B: RS485 serial
communication B
Power supply
V+: Positive power supply of DC power supply GND: Negative terminal of DC power
supply, common terminal
R(n)+: NTC
sensor power supply terminal, about 0.1mA output.
GND: NTC sensor
common terminal.
Note①：
The purpose of this feature is to prevent accidental modification of parameters. If the parameter protection function is turned on, the
10H-11H parameter registers can be modified within 255 seconds after power-on. After 255 seconds, 10H-11H cannot be written,
but can only be read. An attempt to write these registers will return an error response. If the current protection state = off, and the
user operation sets the protection state = on, after the device receives the command, if it is turned on for more than 255 seconds, it
will enter the protection state immediately; if it is less than 255 seconds, it will delay to 255 seconds to enter the protection state. To
turn off the protection function, the device must be powered on again and reset the parameters within 255 seconds.
