AP5427A is railway certified standard 3U plug-in multi-channel IGBT gate drive and real-time power module monitoring board for Alstom metro and light rail traction converter racks. It receives synchronized PWM modulation commands from MVTU/MVTT master traction CPU via rack internal backplane bus, outputs isolated high-current gate drive signals to control high-power traction IGBT modules, while continuously detecting critical fault states including IGBT desaturation, DC-link overcurrent, gate power supply failure and power device overtemperature.

MPA157 is EN 50155 railway certified 3U plug-in digital input/output and safety chain signal processing board for Alstom metro and light rail traction converter racks, belonging to the standard MV traction control platform.

TTM211/IP166 is EN50155 railway certified 3U plug-in traction-TCMS gateway communication board for Alstom metro & light rail traction converter racks under MV control platform. It acts as bidirectional isolated data bridge between MVTU/MVTT traction master CPU internal rack backplane and vehicle train communication bus (MVB/RS485/IP interface marked IP166).

SIR4-S3-4-1-2 is EN 50155 railway certified 3U plug-in safety relay isolation board for Alstom metro and light rail traction converter MV control platform. It adopts redundant safety relay architecture to process vehicle high-voltage safety chain, emergency stop and interlock feedback signals, realizing electrical isolation between field safety circuits and internal traction control logic.

8239-4018 is EN 50155 certified railway standard 3U slide-in plug-in signal acquisition and safety interlock expansion board for Alstom MV metro/light rail traction converter racks, factory part number corresponding to standardized digital I/O hardware matched with MPA157 series platform.

8197-4002 is EN 50155 railway certified 3U plug-in signal conditioning board, the factory spare part code corresponding to CDG11AF series analog acquisition board for Alstom MV metro and light rail traction converter racks. It integrates galvanically isolated DC-link voltage, three-phase inverter current detection, multi-channel 4–20mA temperature signal collection and DC24V opto-isolated safety chain input circuits.

9510-4001 is EN 50155 railway certified 3U plug-in traction-TCMS gateway communication board, factory component spare part number corresponding to TTM211/IP166 vehicle bus interface board of Alstom MV metro & light rail traction control platform.

8165-4004 is EN 50155 railway certified 3U slide-in plug-in IGBT power module drive board, factory spare part number corresponding to AP5427A standard drive hardware of Alstom MV metro and light rail traction converter platform.

8198-4002 is EN 50155 railway certified 3U plug-in signal conditioning acquisition board, factory spare part serial number of CDG11AF upgraded series analog sampling board for Alstom MV metro and light rail traction converter racks.

NG4 is EN 50155 railway certified standard 3U slide-in isolated low-voltage backup power module for Alstom MV metro and light rail traction converter racks, equivalent to PRS12N series platform hardware.