Technical Parameters Basic Information Brand: ALSTOM Part Number: 57721819 Form Factor: Standard 3U slide-in rack pluggable module Matching Equipment: EP3-E-4-EN / EPIC-III traction main control card, KCEG series IGBT gate drive boards, KBCH high-voltage auxiliary power supply Application: European urban metro, light rail traction converter analog monitoring and hardware safety interlock control Control Power Supply Rated operating voltage: DC 24V vehicle control power Operating range: 18 VDC ~ 30 VDC Max power consumption: 9.7 W Protection: Reverse polarity diode, TVS surge suppression filter, input overcurrent fuse Analog Sampling Channels Galvanically isolated DC-link high voltage sampling for inverter closed-loop regulation Isolated three-phase inverter output current & braking resistor current acquisition Multi-channel 4–20mA temperature inputs: IGBT power module, traction motor winding, cooling system temperature detection Multi-stage EMI filter circuit to suppress high-frequency switching noise generated by IGBT power stage Digital Safety Interlock IO 12-way opto-isolated DC24V digital inputs: cabinet safety door contact, emergency stop loop, cooling fan fault, high-voltage earthing switch state feedback Independent hardware interlock circuit: Instantly send blocking signal to gate drive boards once safety loop is disconnected, independent of CPU software logic Internal Rack Communication High-speed proprietary backplane bus for bidirectional data transmission: upload voltage/current/temperature sampled values and interlock fault status to master traction CPU, receive synchronous clock and control instructions from main control unit. 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 OK, Sampling Active, Safety Interlock Fault, Communication Loss Fastening: Anti-looseness lock buckle, stable electrical contact under long-term vehicle vibration operation Railway Environmental & EU EN 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