Does isolated barrier require grounding like zener barrier?
Does isolated barrier require grounding like zener barrier? 2019-09-25 Does isolated barrier require grounding like zener barrier? 183

Ansower from CHENZHU:

Isolated barrier does NOT require grounding.


Isoated barrier contains zener barrier funtion.


To be intrinsically safe (I.S.), Zener barriers must be connected to a dedicated I.S. ground. This ground wiring must be run separately, i.e. in separate cable trays – which costs money to create and maintain.


Unlike zener barrier, Isolated barrier has galvanic isolation between input and output. 

Take CHENZHU's isolated barrier for an example: The isolation voltage is above 2500 V, while the control cabinet is less than 500 V, cannot breakdown the I.S barrier.


In addition, the energy-limited unit of the I.S barrier forms a loop, independently from the control circuit.


Below drawing for your reference.


Does isolated barrier require grounding like zener barrier?

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