supply of controller [pcb] for 110v dc bldc railway carraige fan of 400 mm sweepcontroller [pcb] for 110v dc bldc railway carraige fan of 400 mm sweep,controller [pcb] for 110v dc bldc railway carraige fan of 400 mm sweep , confirming to rdso specification no. rdso/ pe/spec/ tl /0021- 2005 [rev - 3] with amendment no 1. note: any a pproved supplier of bldc fan firm shall be ensured, that the pcb shall be suitable for all makes of bld c fan which are listed in approved vendor directories accepted make: any oem of bldc fan of 400m m sweep carriage fan [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]