Technical Specifications Basic Identification Brand: Alstom Full Part Number: 3EST000225-7161 Product Type: Traction Logic & Signal Acquisition Plug-in PCB Card Application: EMU/metro traction control cabinet, motor speed & temperature signal processing, safety interlock control Power Supply Parameters Rated Operating Voltage: DC 24V Operating Voltage Range: 18V ~ 30 VDC Max Power Consumption: 14W Protection: Built-in reverse polarity protection, TVS surge suppression Insulation: Reinforced isolation between power, analog and digital circuits, 2kVAC dielectric withstand Signal Interface Configuration Analog Input: 8 channels, 4–20mA / 0–10V sensor signal interface, 16-bit ADC precision Digital Input DI: 10 channels, DC24V vehicle equipment status feedback Digital Transistor Output DO: 6 channels for contactor and actuator drive Communication: Proprietary internal rack serial bus for master controller data exchange Local Storage: Onboard EEPROM for parameter storage and fault history recording Mechanical & Installation Mounting: 3U standard rack slide-in pluggable module Connection: Rear gold-plated edge connector for backplane power & signal interconnection PCB Protection: Full conformal anti-corrosion coating Overall Dimensions: H130mm × W100mm × D220mm Net Weight: 0.73kg Fastening: Front panel lock buckle to prevent loosening under vibration Environmental & Railway Standards Operating Temperature: -25 ℃ ~ +70 ℃ Storage Temperature: -40 ℃ ~ +85 ℃ Humidity: 5%–95% non-condensing Vibration Test: IEC 61373 rolling stock standard (10–150Hz) Shock Resistance: 12g half-sine impact load Fire Safety: EN 45545-2 HL2 low smoke flame retardant material EMC Compliance: EN 50121-3-2 railway vehicle electromagnetic immunity