If you are referring to "hot" as in (spark/fire hazard) rather than temperature:
Use original maps. Burnt "backup" CDs are harder for the old laser to read, causing it to run hotter. ⚡ Technical Wiring & Pinout siemens ncdr 1100 manual hot
Before diving into the manual or the heat issue, it is vital to understand the hardware. The is typically part of the Siemens SIMODRIVE or SINAMICS family—a compact, regulated power supply unit used in industrial CNC machines, servo drives, and automation cabinets. If you are referring to "hot" as in