Type:Logic ICs
Condition:New
Supply Voltage:10V-30V
Dissipation Power:3W
Operating Temperature:-10 to +55
Model Number:PT1000 PT100 8 way platinum resistance
Type 1:PT100/PT1000 acquisition module
Collection type:Channel isolation acquisition
Communication type:RS485 MODBUS-RTU
Characteristic:Signal acquisition, RS485 communication, the main power of mutual isol
Technology:Industrial patch design
PT100/PT1000 channel 8 platinum collection module, platinum resistance using channel isolation and acquisition, effectively prevent the channel crosstalk; full range acquisition range of -200-850 degrees, can be set to display 0.1 degrees or 0.01 degrees, acquisition accuracy + 0.05%. Communication using MODBUS-RTU RS485; can be adapted to PLC, DCS and a variety of configuration software, etc. The first chapter product introduction
A. Summary
MB8RTD8High precision acquisition module, Pt resistance(385 PT100/PT1000Dual excitation current500uA/250uA)The platinum resistance excitation source is a double matching programmable excitation current source, and the acquisition precision and the speed are higher and faster.RS485Interface output moduleModbus-RTUCommunication, can be suitable forPLC,DCSAnd a variety of configuration software, etc..
Signal acquisition, CPU and power input, RS485 communication electrical signal isolation, the effective suppression of all kinds of serial mode and common mode interference, to ensure the accuracy of the data, but also to ensure the reliability of the module.
Two. Characteristic
1. Using standard Modbus-RTU protocol.
2. According to their own needs to set the input signal type channel.
Three High precision signal acquisition: using high precision 24 bit AD and dual excitation to match the programmable current source.
4. The platinum resistance is collected by channel isolation, which can effectively prevent the channel crosstalk.
Five Security: signal acquisition, signal output, power supply, RS485 communication electrical signals isolated from each other.
Six Communication protection: RS485 communication signal output interface using overvoltage and over current dual protection.
7. Input signal type, communication format can be set through the software.
8. Power polarity protection.
Three. Technical index
| project | parameter |
| AI Signal input | 1Input channel: 4 channel isolated analog acquisition 2Input signal type: platinum resistance (PT100/PT1000) ThreePlatinum resistance of each channel isolation collection, effective prevention of channel crosstalk 4Sampling rate: 8 channels per 400mS acquisition time (2.5 times per second acquisition point) 5Resolution: 24 AD bit acquisition SixAcquisition circuit and CPU isolation voltage protection: 1500V |
| RS485 Communication output | 1Communication protocol: MODBUS-RTU 2Interface type: isolated RS485 communication, the output of the interface using the overvoltage and overcurrent protection 3Baud rate: 1200BPS, 2400bps., 4800bps, 9600bps, 19200bps 38400bps57600bps, 115200bps. 4Check bit: no parity check, parity check 5. setting: module address, baud rate, parity bits can be set by software SixCommunication circuit and CPU isolation voltage protection: 1500V |
| Module size | Separate module size:115mm*90mm*40mm |
| Installation method | standardDINGuide rail mounting or screw fixation |
| work environment | Temperature:-10 ~ +55℃temperature humidity: 35~85% (not dew) |
| Working power supply | 1Power supply voltage: 10V~30V wide range of power supply, with the power supply polarity protection 2Power consumption: less than 3W |
Four. measurement accuracy
| Input type | measuring range | Display resolution | accuracy |
| rtd | PT100(-200 - 850 degrees C) | 0.1C/0.01 C | 0.05% |
| PT1000(-200 - 850 degrees C) | 0.1C/0.01 C | 0.05% |
Five. Product appearance
Six. Module indicator lamp and switch function specification
1. POW;Module working status indication
A.Green light: the module works in the running state. B. red light: the module has the configuration parameters have been written, need to re power up.
2. COM:Communication status indication
A.The green light flashes: the communication receives the data B. red light flashes: the module is sending data
C.The green light is always on: A and B on the communication line RS485 line is connected to the reverse or the connection is broken.
Three Module right reset switch
A. When the communication parameters (module address, baud rate, parity bit) do not know or communication parameter misspecification, and can not establish contact module communication, the solution is to reset the communication parameters; we use the clip to hold the reset switch is not open, 5 seconds after the module of [POW] red light, release the reset switch, the communication parameters has been reset, as long as the power supply module after the restart time, the communication parameters of the module has been reset.
B. Communication parameters after reset: Address: 1, baud rate: 9600bps, parity: No.
Seven. Typical application wiring diagram
Eight. Terminal definition
| terminal | Name | Explain | | terminal | Name | Explain |
| 1 | +Vs | Power input + | 28 | A | A RS485Communication + |
| 2 | GND | Power input - | 27 | B | B RS485Communication - |
| 3 | AI0+ | Analog input channel 0 positive | 26 | C7 | Platinum resistance input 7 |
| 4 | AI0- | Analog input channel 0 negative | 25 | AI7- | Analog input channel 7 negative |
| 5 | C0 | Platinum resistance input 0 | 24 | AI7+ | Analog input channel 7 positive |
| 6 | AI1+ | Analog input channel 1 positive | 23 | C6 | Platinum resistance input 6 |
| 7 | AI1- | Analog input channel 1 negative | 22 | AI6- | Analog input channel 6 negative |
| 8 | C0 | Platinum resistance input 1 | 21 | AI6+ | Analog input channel 6 positive |
| 9 | AI2+ | Analog input channel 2 positive | 20 | C5 | Platinum resistance input 5 |
| 10 | AI2- | Analog input channel 2 negative | 19 | AI5- | Analog input channel 5 negative |
| 11 | C2 | Platinum resistance input 2 | | 18 | AI5+ | Analog input channel 5 positive |
| 12 | AI3+ | Analog input channel 3 positive | | 17 | C4 |
