Nanjing Metran Measurement & Control Instrument Co., Ltd.
Main products:Flowmeter,Pressure Sensor,Distribution Isolation,Digital Display Instruments,Isolation Safety Barrier
Contact Us
  • Contact Person : Ms. Hu Jessie
  • Company Name : Nanjing Metran Measurement & Control Instrument Co., Ltd.
  • Tel : 86-25-52366120
  • Fax : 86-25-52899138
  • Address : Jiangsu,Nanjing,No.12, Rungu Road, Guli Industrial Zone, Jiangning District, Nanjing
  • Country/Region : China
  • Zip : 211146

MTA/DGA Repeated Signal Safety cpr barrier device

MTA/DGA Repeated Signal Safety cpr barrier device
Product Detailed
MTA/DGA Repeated Signal Safety Barrier 1. High reliable 2. Explosion-proof 3. High Safety 4.Explosion-proof mark: [Exib] II


 MTA/DGA Repeated Signal Safety cpr barrier device  

High Safety

Voltage-current limiting circuit is designed to be dual, which greatly increases the safety and reliability of

the system.The transformer of intrinsic-safety circuit is separated from that of non-intrinsic-safety circuit.

They have no direct connection. Isolation resistance to pressure is as high as 1500Vrms.The fuse has

the ability of high speed and disjunction which achieves the current of 1500A when the voltage is 250VAC.

It accords with the national standard of the latest intrinsic-safety circuit.Power transformer and signal

transformer are encapsulated. So it can eliminate the possibility of elastic joint and then further improve

the reliability and safety of the product.


The product uses semiconductor devices of high quality brand, adopts automatic SMT patch craft manufacturing,

and employs modern test-equipment like computers to test products so as to ensure the quality of the

products.The design of the circuit is fully optimized according to the national electromagnetic-compatibility

standard.Every product has high temperature and aging treatment before leaving the factory.

Working Principle

The standard current-input/output repeated Zener safety barrier is a modular card loading intrinsic-safe

explosion-proof instrument. It restricts dangerous energy from intrinsic safety terminal entering into

dangerous places and transform the 420mADC signal into 4-20mADC or 1-5VDC signal. What makes

it different from other zener safety barrier is that it can resume to normal work automatically after the

dangerous energy disappears.

Technical Parameters

Explosion-proof mark: [Exib] IICT6The Intrinsic Safety Explosion-Proof Parameters: Uo≤35DVC, lo≤35mADCThe Intrinsic Safety Explosion-Proof Parameters: Co ≤0.045uF, Lo≤2mHThe Intrinsic Safety Explosion-Proof Parameters: Po≤0.3W, Um=250VAC/DCTerminal in Dangerous Zone: (7)+(8)-, (10)+(11)-, 4-20mADCTerminal in Safe Zone: (1)+(2)-(3)ground, (4)+(5)-, 4-20mADC(1-5VDC)

MTA/DGA Repeated Signal Safety cpr barrier device

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