Keywords: PT1000 platinum resistance temperature and humidity sensor, LM-PT100, LM-PT1000 sensor, PT1000 thermal resistance, China PT1000 sensor manufacturer



Product brand: Link-Max
Product introduction:
The LM-PT100 and LM-PT1000 are thermal resistance temperature and humidity sensors with LCD display. Working in the industrial environment of -40 ° C ~ +85 ° C (host range, not an external sensor range), the acquisition temperature range is -200 ° C ~ +200 ° C, display accuracy of 0.1 ° C; The overall accuracy is 0.3 °C. By connecting our thermal resistance sensor with our RS-485 repeater, we can connect 32 PT100 and PT1000 thermal resistance acquisition modules to the same network up to 255, and the maximum communication distance is 1200 meters. The LM-PT100 and LM-PT1000 RTD sensors can also be combined with the LM-8052NET to form a TCP/IP temperature acquisition network for remote acquisition of temperature.



Detailed Description:
LM-PT100, LM-PT1000, WD-PT100, WD-PT1000 is a new type of thermal resistance temperature sensor acquisition module (without PT100, PT1000 temperature sensor, need to purchase separately). It can be used to collect the temperature of two channels on the spot. At the same time, the RS-485 bus serial communication interface can be used to connect with the environment monitoring host or other industrial control host conveniently.

Working at -40 ° C ~ 85 ° C (host range, not an external sensor range) industrial grade PT100, PT1000 thermal resistance acquisition module. There are two kinds of display modes: WD series without LCD display (WD-PT100, WD-PT1000) and LM series with LCD display (LM-PT100, PT1000). The acquisition temperature range is -200 °C ~ +200 °C, the display accuracy is 0.1 °C; the comprehensive precision is 0.3 °C.

The PT100 and PT1000 RTD acquisition modules can be connected to the RS-485 local area control network via an isolated 485 communication interface. RS-485 allows up to 32 PT100 and PT1000 RTD acquisition modules to be connected to the same bus. However, if Link-Max RS-485 repeater is used, up to 256 PT100 and PT1000 RTD acquisition modules can be connected to the same network, and the maximum communication distance is 1200m. Before installing the PT100 and PT1000 RTD acquisition modules into the network, configure them. First, the baud rate of the module should be set to match the baud rate of the network. At the same time, the PT100 and PT1000 RTD acquisition modules should be set to different addresses to prevent the address conflict of each PT100 and PT1000 RTD acquisition module.

After the PT100 and PT1000 RTD acquisition modules are correctly connected, the host issues a read data command to enable the PT100 and PT1000 RTD acquisition modules to send data back to the host. The data in the PT100 and PT1000 RTD acquisition modules is updated every second and the display data of the LCD display is updated periodically (LM series only).

The WD series is used where there is no need to display temperature, such as an outdoor ATM cabinet, which is a DIN rail mounted enclosure. In addition to temperature acquisition, the LM series can also preset the upper and lower alarm values of the temperature. When the environmental parameters exceed the set value, the buzzer in the main engine immediately sounds an alarm.

PT100 and PT1000 RTD acquisition modules are all-digital PT100 and PT1000 RTD acquisition modules with wide application prospects. Using this module makes temperature monitoring very easy. The PT100 and PT1000 RTD acquisition modules can be connected to two-wire, three-wire, four-wire PT100 and PT1000 thermal resistors. When three-wire four-wire is used, the module can effectively compensate the line resistance. Making the length of the cable does not affect the acquisition accuracy. The module is widely used in environmental monitoring systems, power systems and industrial automation, and has excellent cost performance.

The PT100 and PT1000 RTD acquisition modules can also be combined with the LM-8052NET to form a TCP/IP temperature acquisition network for remote acquisition of temperature.



Technical Parameters:
Input response time (data update rate in module) is 1 second synchronous measurement
One-way Isolated 485, MODBUS RTU Communication Protocol
When using RS-485 two-wire output interface, it has the ESD protection function of + 15kV.
Rate (bps) can be selected from 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
Optional dual protocol communication function, customers can request communication protocol with ASCII code format or hexadecimal format
When the instruction is in ASCII format, it is suitable for the microcomputer programming interface; When the instruction is in hexadecimal format, it is suitable for the microcontroller programming interface.
Configurable temperature upper and lower limit alarm function (LM series only)
Accuracy level: 0.2
Power supply: +7.5~30V
Power consumption is less than 0.1W
Host operating temperature range is -40 ° C ~ +85 ° C
Measuring range is -200 ° C ~ +200 ° C
Storage conditions are -40 ° C ~ +85 ° C (RH: 5% ~ 95% no condensation)
Volume: LM series is 106mm × 98mm × 22mm; WD series is 26mm × 98mm × 41mm Installation method:
LM series is wall-mounted mounting hole, built-in diagonal bracket can also be placed on the table; WD series is DIN rail card

Model Guide:
LM-400 network temperature sensor sensor acquisition module with LCD display (with temperature and humidity sensor)
LM-410 network temperature and humidity sensor sensor acquisition module with LCD display (with temperature and humidity sensor)
LM-420 network temperature and humidity acquisition module with LCD display with upper and lower limit alarm output (can control sound and light alarm)
LM-PT100 network type two-way PT100 thermal resistance acquisition module with LCD display
LM-PT1000 network type two-way PT1000 thermal resistance acquisition module with LCD display
WD-PT100 network type two-way PT100 thermal resistance acquisition module without LCD display
WD-PT100 network type two-way PT1000 thermal resistance acquisition module without LCD display