Technical Parameters Basic Information Brand: Alstom Converteam Part No.: M5A121021001C Form Factor: Standard 3U slide-in rack pluggable module Matching equipment: EP3-E-4-EN / EPIC-III traction main control board, KBCH/MAVS high voltage auxiliary power supply, KCEG series gate drive boards Application: Urban metro, light rail vehicle traction converter analog monitoring and safety interlock signal processing Control Power Supply Rated operating voltage: DC 24V vehicle control power Operating range: 18 VDC ~ 30 VDC Max power consumption: 9.5 W Built-in protection: Reverse polarity diode, TVS surge filter, input overcurrent fuse Analog Signal Acquisition Channels Multi-channel 4–20mA analog input: Traction motor winding temperature, IGBT module temperature, cooling system temperature Isolated high voltage sampling: DC-link bus voltage real-time detection Isolated current sampling: Inverter output phase current, braking resistor current monitoring Onboard signal filter circuit: Suppress high-frequency interference from power switching noise Digital Safety Interlock IO 12-way isolated DC24V digital input: Cabinet door safety contact, cooling fan fault, earthing switch state, emergency stop loop feedback Hardware interlock logic: Instantly send fault shutdown signal to gate drive board once safety loop breaks Communication Interface Alstom proprietary high-speed backplane bus, upload real-time sampled analog values and interlock status to master control CPU for closed-loop traction control and fault diagnosis. Mechanical Specifications Overall dimension: H130 mm × W98 mm × D220 mm PCB protection: Full acrylic conformal coating, anti-moisture, anti-corrosion, anti-dust, anti-mold Front panel LED indicators: Power Supply OK, Analog Sampling Active, Safety Interlock Fault, Communication Loss Fastening: Anti-looseness lock buckle, stable contact under long-term vehicle running vibration Railway Environmental & EU Compliance Operating ambient temperature: -25 ℃ ~ +70 ℃ Storage & transport temperature: -40 ℃ ~ +85 ℃ Relative humidity: 5% ~ 95% non-condensing Vibration standard: IEC 61373 railway rolling stock Shock resistance: 12g half-sine wave impact test EMC standard: EN 50121-3-2 railway vehicle electromagnetic compatibility Fire safety grade: EN 45545-2 HL2 low smoke, low toxicity flame retardant