Control Unit Profile — CU230P-2 HVAC
The Siemens 6SL3243-0BB30-1HA2 is a spare-part SINAMICS G120 Control Unit CU230P-2 HVAC, handling USS, MODBUS RTU, and BACnet MS/TP fieldbus protocols. It carries 6 digital inputs, 3 digital outputs, 4 analog inputs, and 2 analog outputs, plus one motor temperature sensor input. Two auxiliary power supplies (10 V DC and 24 V DC) are included, along with one 24 V DC power supply input. USB and MMC interfaces are on the front for parameter backup and commissioning. The enclosure is rated IP20, so it belongs inside a cabinet or control panel — not in a washdown or outdoor location.
Mounts on the standard DIN rail inside a G120 Power Module chassis. The IP20 rating means no gaskets or washdown provisions — plan for a clean, dry enclosure. The USB and MMC interfaces face forward for easy access during commissioning and firmware updates. The 24 V DC power supply input is separate from the auxiliary outputs; verify the power budget on the backplane before connecting additional loads.