How to choose cu for pm240-2

Hello friends, fighting against this coronavirus, we'll get it!.

We are going to change an old MM440 to sinamics. It's a induction motor 3600rpm and 0.3kw.

Its working on v/f control but maybe we change to vector control controlled by PLC and profibus.

what's the cu its better?

we have in our job:

CU250S-2DP

CU240B-DP

CU240E-DP

Any link to see the meaning of "250" "240" "S""E"....??

Thank you ver much.

Hello,

Please refer below link but I am afraid it does not mention any information about meaning of 250, 260.

SINAMICS low-voltage converters.    Selection and ordering guide  

Hi, you said:

We are going to change an old MM440 to sinamics. It's a induction motor 3600rpm and 0.3kw.

Its working on v/f control but maybe we change to vector control controlled by PLC and profibus.

what's the cu its better?

we have in our job:

These devices are:

CU250S-2DP, (250) regenerative, (S) encoder feedback, (DP) Profibus.

CU240B-DP, (B) this is discontinued.

CU240E-DP, (E) standard drive similar to the MM440, (DP) Profibus.

Also as an example: CU240E-2 DP F, (-2) latest version, (DP) Profibus, (F) failsafe options to SIL2 cat 3.

The motor is a two pole device 3000rpm synchronous, recommend oversizing the power module to 0.55kW for operating in field weakening. I am making an assumption here that the nameplate shows 3000rpm?

The CU240E-2 DP, will offer control similar to the MM440, with SLVC, that is Sensorless Vector Control, and profibus, if Profibus is not required look at CU240E-2.

Tractor

https://support.industry.siemens.com/cs/document/109755273/catalog-d-31-1%3A-sinamics-inverters-for-single-axis-drives-built-in-units?dti=0&pnid=13223&lc=en-WW

@PISCEAN 2010

@TRACTOR

Thank you for your help.

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