CIMR-M5N27P5 belongs to the discontinued Yaskawa VS-626M5 series specially designed for CNC machine spindle drive. It is a bus-controlled inverter working with MR5 series common rectifier unit via shared DC bus power supply. Original production has been stopped, and the unit is only available as refurbished spare parts for maintenance of old Japanese imported machining centers and milling machines.

CIMR is the fixed prefix of Yaskawa inverter model; M5 stands for VS-626M5 spindle dedicated series; N represents NC digital bus control version equipped with YENET communication for YASNAC and FANUC CNC systems; 2 refers to 200V DC bus grade; 7P5 means rated matching spindle motor power of 7.5kW.

This drive takes DC270V~325V power supply from matched MR5N rectifier module instead of direct AC input. It matches a 7.5kW three-phase spindle motor with rated output current 31A. The adjustable output voltage ranges from 0 to 230V AC and maximum output frequency reaches up to 600Hz for high-speed spindle operation. It supports 150% rated current overload lasting 60 seconds to cope with heavy cutting load. Built-in brake chopper allows external braking resistor connection for rapid spindle stop. Full closed-loop vector control is realized via CN1 encoder feedback port. Complete protection functions include overcurrent, overvoltage, undervoltage, overheat, output short-circuit and motor overload protection.

Primary speed and operation commands are transmitted from CNC controller through proprietary YENET1200 digital bus. Analog signal and multi-step terminal control are reserved as backup mode for maintenance debugging. Closed-loop speed regulation accuracy is controlled within ±0.1% of rated speed for precise machining requirement.

It adopts open-frame IP00 structure with built-in cooling fan for forced air cooling and shall be installed inside control cabinet only. Operating ambient temperature ranges from 0℃ to 50℃, relative humidity 20%~80% without condensation, and applicable installation altitude is below 1000 meters.

Mainly used for spindle driving of vintage imported CNC machining centers and milling equipment for equipment overhaul and spare replacement.