ABB 500CPU 031HDF700003R5122 Central Processing Unit (CPU) module

Product Description

ABB 500-CU03 (official part 500CPU03, 1HDF700003R5122, commonly abbreviated as 500-CU03 in spare part market) is a legacy central processing unit for ABB 500 series (Procontic / REB500 busbar protection). This discontinued CPU acts as the main controller for the rack. It executes logic, processes field signals, manages I/O bus and host communication. It matches REB500 busbar protection relays and BIVECTOR drive controllers. It is widely stocked as spare parts for power plant protection cubicles and retrofits of old automation systems.

Specifications

• Model: 500-CU03 (Official: 500CPU03, 1HDF700003R5122)
• Brand: ABB
• Type: Central Processing Unit Module
• Processor: 32-bit RISC
• Memory: Flash for application, SRAM for data
• Internal Bus: Rack backplane I/O bus
• Communication: RS232 serial; expandable with 500PB101 Profibus DP
• Power Supply: 5VDC from rack backplane
• Mounting: Plug-in subrack module for 19” rack
• Operating Temperature: -25℃ ~ +60℃
• Storage Temperature: -40℃ ~ +85℃
• Protection Class: IP20 (cabinet use)
• Lifecycle: Obsolete, available only from surplus spare stock
• Certifications: CE, UL

Application

1. Main CPU for REB500 busbar protection systems in power plants
2. Control core of BIVECTOR high-power drive controllers
3. Spare replacement for legacy protection cubicles in thermal and hydro power stations
4. Retrofit and maintenance of large industrial drive systems
5. Spares for old Procontic PLC systems

Series Compatible Models

500CPU03, 500PB101 (Profibus interface), 500AI01, 500AO01