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PCS7 Power supply Tolerance!

Created by: Gunners at: 6/18/2009 2:40 PM (9 Replies)

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6/18/2009 2:40 PM	Rate (0)
Gunners Posts: 130 Rating: (18)	Hi all , Can anyone please help me with this question? "The power supply tolerance of the PCS7 system" ????? What is this dependant on??? This is really urgent...please help me, thanks, regards
Gunners Posts: 130 Rating: (18)
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6/18/2009 2:55 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (999)	Pratapks Hi all , Can anyone please help me with this question? "The power supply tolerance of the PCS7 system" ????? What is this dependant on??? This is really urgent...please help me, thanks, regards Do you talk about the line? It should be depending from the used hardware, I think so.
IBN-Service Posts: 8946 Rating: (999)	Last edited by: IBN-Service at: 6/18/2009 2:57 PM Last edited by: IBN-Service at: 6/18/2009 2:56 PM
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6/18/2009 3:11 PM	Rate (0)
Gunners Posts: 130 Rating: (18)	Hi , I think the question is probably like " how much excess or less power supply can the system tolerate" ??????? i think this is my understanding of the question. i.e; + or - some % of the original. i think the answer should be this way.? can anyone help?????? regards,
Gunners Posts: 130 Rating: (18)
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6/18/2009 3:35 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (999)	Pratapks Hi , I think the question is probably like " how much excess or less power supply can the system tolerate" ??????? i think this is my understanding of the question. i.e; + or - some % of the original. i think the answer should be this way.? can anyone help?????? regards, At an PLC7 Machine in a customers office I found follow information on the powersupply - rating plate: U = 110 - 230 VAC f = 50 - 60 Hz. +/-5% I have no idea, if this values are good for other Systems.
IBN-Service Posts: 8946 Rating: (999)	Last edited by: IBN-Service at: 6/18/2009 3:36 PM
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6/18/2009 3:45 PM	Rate (0)
cumulus Platinum Member Joined: 9/27/2007 Last visit: 12/18/2020 Posts: 993 Rating: (102)	Hi Noboby can give you an answer. A PCS7 System can have a lot of komponents (PLS, OS, devices,...). the mosttolerate a litle bitdifferent ranges. You have to specify this questions. For all prdoucts exsists the rigth power supply modul or component. In which context, you have to answer this question??? regards cumulus
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6/18/2009 4:00 PM	Rate (0)
dchartier Grandmaster Joined: 9/27/2006 Last visit: 11/18/2024 Posts: 12296 Rating: (2691)	Hello prataks; If you are speaking of S7-400 CPUs used for PCS 7, you coulduse the Power supply modules chapter from the S7-400 Module Data manual to locate the information you request: http://support.automation.siemens.com/WW/view/en/1117740 You will find specifications for each power module MLFB, such as: Specifications of the PS 407 10A and the PS 407 10A R Input voltage • Rated value 110/230 V DC 20/230 V AC • Permissible range 88 to 300 V AC 85 to 264 V DC (varying voltage input) Line frequency • Rated value 50/60 Hz • Permissible range 47 to 63 Hz Hope this helps, Daniel Chartier

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6/18/2009 9:50 PM	Rate (0)
CBo Gold Member Joined: 4/5/2006 Last visit: 10/10/2024 Posts: 917 Rating: (63)	Hi Pratapks, as well as forum friends poested above, there is not an answer to your question which component in your system PS, CPU, IM, Inpot/Output card (optoisolated or not) are you using Vdc or Vac power supply? Power supply is good quality or disturbed (bad line supply) When you talk about complete system doesn't forget field instrumentation, it's need power supply too and you have to connect intrumentation to your system...that means you have to make a good enginerring (and insulation for keep component safety)... ...sometimes you have to put insulation tranformer in your cabinet (good for high frequancy disturbance)...and sometimes you have to think to use a static UPS (for global safety).. the right question, in my opinion, is not what system can support qithout problem...but...what i have to do to avoid problem and where problems could come in. i know a good enginering is more expensive...as well as i learned a good engineering keep my autometed plant safe...(and me too ) in conclusion, have a look for technical specification to know where you can get trouble...then think you could need external component to help to keep your system safe Regards

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6/19/2009 5:48 AM	Rate (0)
Gunners Posts: 130 Rating: (18)	Hi all, Thanks to all of you for your valuable comments...... That helped me solve my problem... Infact according to the parts i have selected the answer is +/- 5% It is in the permissible limit. thank you folks regards,
Gunners Posts: 130 Rating: (18)
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6/19/2009 7:33 AM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 11/1/2024 Posts: 10229 Rating: (1181)	Hi, Yes it is in the "permissible limit". And will be easier for you. Basically you could started from acceptable standarts in country which your planning to improve this project. Almost in all, power suply voltage is accepted +/-5% tollerans form nominal.... And for all equipments you need 1 phase or 3 phase power suply. After that this is transformered in auxiliary power suply from "standart" devices wih own speciffications for outputs... Hope this will helps. Best regards Hristo Mihalev

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6/19/2009 7:59 AM	Rate (0)
Gunners Posts: 130 Rating: (18)	Thank you for your comments. regards,
Gunners Posts: 130 Rating: (18)
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