Product overview

OneOverview of DM distributed test sub station　　

　　DM series distributed test sub station is an important part of the DMC300 distributed measurement and control system based on the concept of digital front-end, which is used to realize the data acquisition function of DMC300 distributed measurement and control system.

　　DM series distributed test station mainly includes the test station of the dual channel power measurement, 4 ~ 20mA and other standard analog signal measurement sub station, pulse frequency measurement sub station and temperature, humidity measurement station, etc..

TwoBlock diagram of DM series distributed test sub station　

　　The following diagram for its general principle block diagram:

Block diagram of DM series distributed test sub station

Selection and Application

OneDM series distributed test sub station application

　　1、The DMC300 distributed measurement and control system of various sub stations can form a large scale measurement and control system, which is used to realize the DCS measurement and control in industrial field;

　　2、Can use a single or a small number of sub stations with the necessary accessories and PC software instead of a variety of professional equipment, such as:

　　A DM4032 temperature test station and a small number of accessories and the host computer software can achieve 8 temperature inspection instrument;

　　A DM4022 frequency measurement sub station and a small amount of accessories and the host computer software can be realized tachometer and torque meter;

　　A DM4105-2 three-phase voltage test station and a small number of accessories and the host computer software can achieve the power grid voltage monitoring instrument, etc..

TwoDM series distributed test station commonly used models

　　

　　Model: DM4021

　　Single channel frequency test sub station

　　Signal type: AC or DC pulse signal

　　Frequency range: 0.1Hz~50kHz

　　Amplitude range: 2Vpp~30Vpp

　　Accuracy: 0.02%rd

　　

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　　Model: DM4022

　　Name: dual channel frequency test sub station

　　Signal type: square wave signal or DC pulse signal

　　Frequency range: 0.1Hz~50kHz

　　Amplitude range: 5Vpp~30Vpp

　　Accuracy: 0.02%rd

　　

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　　Model: DM4024

　　Name: four channel frequency test sub station

　　Signal type: AC or DC pulse signal

　　Frequency range: 0.1Hz~50kHz

　　Amplitude range: 2Vpp~30Vpp

　　Accuracy: 0.02%rd

　　

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　　Model: DM4031

　　Name: four channel temperature test sub station

　　Signal type: PT100

　　Temperature range: -40 DEG C ~400 C

　　Accuracy: + (0.1%rd+0.5 C)

　　

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　　Model: DM4032

　　Name: eight channel temperature test sub station

　　Signal type: PT100

　　Temperature range: -40 DEG C ~400 C

　　Accuracy: + (0.1%rd+0.5 C)

　　

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　　Model: DM4042

　　Name: eight channel 4~20mA test station

　　Signal type: 4~20mA, 0~20mA, 0~5V

　　Accuracy: 0.1%rd + 0.1%fs

 

 

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　　Model: DM4101-1

　　Name: DC power test station

　　Accurate voltage measurement range: 3V~750V

　　Accurate current measurement range: 4mA~1A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4101-2

　　Name: DC power test station

　　Accurate voltage measurement range: 3V~750V

　　Accurate current measurement range: 25mA~6A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4101-3

　　Name: DC power test station

　　Accurate voltage measurement range: 3V~750V

　　Accurate current measurement range: 1mV~250mV

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4102-1

　　Name: DC power test station

　　Accurate voltage measurement range: 6V~1500V

　　Accurate current measurement range: 4mA~1A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4102-2

　　Name: DC power test station

　　Accurate voltage measurement range: 6V~1500V

　　Accurate current measurement range: 25mA~6A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4102-3

　　Name: DC power test station

　　Accurate voltage measurement range: 6V~1500V

　　Accurate current measurement range: 1mV~250mV

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4103-1

　　AC power test station

　　Frequency range: 5~400Hz

　　Accurate voltage measurement range: 4V~1000V

　　Accurate current measurement range: 4mA~1A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4103-2

　　AC power test station

　　Frequency range: 5~400Hz

　　Accurate voltage measurement range: 4V~1000V

　　Accurate current measurement range: 25mA~6A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4104-1

　　AC power test station

　　Frequency range: 5~400Hz

　　Accurate voltage measurement range: 0.5V~120V

　　Accurate current measurement range: 4mA~1A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4104-2

　　AC power test station

　　Frequency range: 5~400Hz

　　Accurate voltage measurement range: 0.5V~120V

　　Accurate current measurement range: 25mA~6A

　　Voltage / current measurement accuracy: 0.1%rd + 0.1%fs

　　Power measurement accuracy: 0.2%rd + 0.2%fs

 

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　　Model: DM4105-1

　　Name: three phase voltage test station

　　Frequency range: 5~400Hz

　　Accurate voltage measurement range: 0.5V~120V

　　Voltage measurement accuracy: 0.1%rd + 0.1%fs

 

 

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　　Model: DM4105-2

　　Name: three phase voltage test station

　　Frequency range: 5~400Hz

　　Accurate voltage measurement range: 4V~1000V

　　Voltage measurement accuracy: 0.1%rd + 0.1%fs

 

 

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　　Model: DM4107-1

　　Name: three phase current test station

　　Frequency range: 5~400Hz

　　Accurate current measurement range: 4mA~1A

　　Current measurement accuracy: 0.1%rd + 0.1%fs

 

 

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　　Model: DM4107-2

　　Name: three phase current test station

　　Frequency range: 5~400Hz

　　Accurate current measurement range: 25mA~6A

　　Current measurement accuracy: 0.1%rd + 0.1%fs

Performance parameter

OneElectrical isolation

　　1500Vrms isolation between input signal and power supply;

　　1500Vrms isolation between input and RS485 output interface;

　　1500Vrms isolation between power supply and RS485 output interface;

　　110kV isolation between fiber output and input and power supply.

TwoElectromagnetic compatibility

　　Digital transmission, with strong anti-interference ability.

　　When the output is transmitted by optical fiber, the transmission is not affected by electromagnetic interference.

ThreeIndependence 　　

　　Each sub station uses an independent power supply, communication system and microprocessor, each sub station has a strong independence, a sub station does not affect the normal operation of any other sub station.

　　The host can display the online terminal in real time.

FourCommunication protocol　　

　　The AnyBus asynchronous serial communication protocol which is suitable for synchronous high speed sampling is adopted. Single channel maximum sampling frequency up to 100kHz. Even if the 100 channels synchronous sampling, sampling frequency can also reach more than 1000Hz.

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