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Anonymous Poster

MTL5021 SOLENOID ALARM DRIVER

10/21/2008 6:37 PM

I am facing a problem with installation and operation of a MTL5021 SOLENOID/ALARM DRIVER.

The input voltage to the driver is 24Vdc, however the output is only 12Vdc which is not sufficient to energise the solenoid.

I would appreciate inputs to help me correct this and complete this job.

The solenoid used is EP/00019 (RS Limited).

Thank you

John

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bob c
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#1

Re: MTL5021 SOLENOID ALARM DRIVER

10/21/2008 6:49 PM

Can you use the 12 volts to opperate a relay that would energize the 24 volts?

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indel
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#2

Re: MTL5021 SOLENOID ALARM DRIVER

10/21/2008 8:41 PM

Here is the data sheet for your driver:

http://www.mtl-inst.com/products/isolators/5000/datasheets/MTL5021.pdf

It seems that there is a voltage drop that you have to compensate. Maybe your solenoid is drawing a current in the range shown (45 mA). You are allowed to increase the input voltage to 35V. Try and see if this solves your problem.

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Marconet
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#3

Re: MTL5021 SOLENOID ALARM DRIVER

10/23/2008 3:10 AM

The MTL5021 is a galvanic isolator which supply intrinsically safe component. It will limited the power supply given to this component.

So if the voltage is reduce at the output (12V instead of 24Vdc), that means that the current consume by your solenoid is to high.

Check if the solenoid is an intrinsically safe component (Exi or ExnL).

If it is not the case, please could you indicate us what is the Hazardous area classification where you intend to install this solenoid, or why you want to use an galvanic isolator?

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