常见问题

Isolated Barrier

Q01

What are the main points when selecting an isolated barrier?

Q02

How to distinguish between active and passive signals? Take GS8547-EX analog input isolated barrier as an example

Q03

Take GS8547-EX analog input isolated barrier as an example. It has an independent power supply. Does it output active signals?

Q04

What are the differences between independent powered, loop powered and output loop powered.

Q05

Can the analog input isolated barrier be used as an analog output isolated barrier?

Q06

How to calculate the conversion accuracy of the temperature input isolated barrier?

Q07

Digital input isolated barrier should select which output, transistor output or ralay output?

Signal Conditioner

Q01

What are the main differences between Chenzhu's CZ2000 range, CZ3000 range and CZ3500 range signal conditioners?

Q02

How to distinguish between active and passive signals? Take CZ3047 analog input signal conditioner as an example

Q03

Take CZ3047 analog input signal conditioner as an example. It has an independent power supply. Does it output active signals?

Q04

What are the differences between independent powered, loop powered and output loop powered

Q05

Can the analog input module be used as an analog output module?

Q06

How to calculate the conversion accuracy of the temperature input module?

Q07

What are the differences between isolated barriers and signal conditioners?

Surge Protective Device

Q01

What’s the function of SPD?

Q02

To use SPD or not? What are the standards refered?

Q03

How long can SPD lifetime be？

Q04

How to select SPD for power?

Q05

How to select SPD for signal？

Q06

How to select SPD for field instruments?

Q07

What should be cared when install SPD?

Q08

Why can SPD with Uc= 320vac be applied to 380VAC voltage system?

Q09

Why does backup fuse need to be installed with SPD for power? How to select it?

Q10

How to judge if SPD is functional?

Safety Relay

Q01

What is the difference between a safety relay and a general relay?

Q02

How to choose safety relay?

Q03

Are there recommended models for safety relays suitable for process control SIS systems?

Q04

Are there recommended models for safety relays suitable for process control SIS systems?

Q05

Is there a national standard that mandates that SIS systems must use safety relays?

Q06

Can ordinary relays be used in the SIS system?

Q07

What are the common faults and treatment methods of safety relays?

Q08

Is it necessary to use safety relays on mechanical equipment?

Q09

Is there a life cycle / year for the use of safety relays? Does it need to be replaced regularly?

Q10

Why should we pay attention to the start-up current of safety relays?

Smart Controller

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