bids are invited for upgradation of variable frequency drive at arplas welding machine power module 1 - supply of pm240-2 power module without integrated line filter heavy duty 2.2kw cu250s 2 dp bop 2 , power module 2 - supply of pm240 2 power module without integrated line filter heavy duty 0.55kw cu250s 2 dp bop 2 , communication module - supply of profibus connector siemens 6es7 972 0ba52 0xa0 upgraded equivalent. , communication connector - supply of profibus connector siemens 6es7 972 0bb12 0xa0 upgraded equivalent , cable - supply of profibus cable shieled cable , installation - upgradation installation and commissioning of vfds sl no01 and sl no 02 in arplas welding machine