  Many accelerators require considerable electronic systems for tests,
verification, and operation. In Shenzhen Superconducting Soft X-ray Free
Electron Laser (S3FEL), to meet the early tests and verification of various
systems, save development expenses, and improve the reusability of hardware,
firmware, and software systems, we have considered the needs of each system and
preliminarily designed a general electronics platform based on MicroTCA.4. The
Advanced Mezzanine Card (AMC) will place an FPGA Mezzanine Card (FMC) that
supports 500 MSPS to 2 GSPS ADC/DAC. We will design two FMC cards on the Rear
Transition Module (RTM), which can be used for analog signal conditioning and
waveform digitization by 10 MSPS to 250 MSPS ADC/DAC or motor control. The
commercial MCH, CPU, power module, and MTCA crate are deployed. This platform
can also be applied to other accelerator facilities.
