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  • Product number:MC-000467001345
  • Product name:Zener Safety Barrier
  • Product Type:DFA-3400
  • Product nameplate:SAIC
  • Project Category:Unit Meter
  • Manufacturer:Shanghai Automation Instrumentation Co., Ltd.
  • Sales unit: Shanghai Automation Instrumentation Marketing Center
  • Information download:Click to enter the download page  
  • Introduction
  • Specifications
DFA-3□□□ zener safety barrier is an auxiliary unit of DDZ-III electric unit combination instrument.
Safety Barrier is key equipment for intrinsically safe explosion-proof instrument. In normal state, the safety barrier does not affect the normal operation of the system; when there is fault, safety barrier will limit voltage and current to limit electric energy within the limits of ignition and ensure the security. It is widely used in petroleum, chemical industry, light industry and other explosive flammable place.
High Explosion-proof grade
High accuracy
Small size
Easy to install
Double-based components circuit, high reliability
Max voltage: VM:AC/DC 220V
Rated voltage:DC 24(+10~-5)%V
Rated Current ID:DC4~20mA
Inner Resistance:(DC 20mA)DFA-3100≤190Ω    DFA-3300≤150Ω
accuracy:DFA-3100 0.2%   DFA-3300  0.5%
limiting voltage:Vk:<30V
limiting current Ik:<25mA
ambient temperature 5~40℃
RH <85%
Working frequency <10-55Hz,amplitude <0.75mm
External magnetic field <400A/m
Without corrosive media for chrome-nickel layer of non-ferrous metals and alloys in ambient.

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