ALSTOM L54E1100EC00

Technical Specifications

• Safety Integrity Level: SIL4 (EN 50128 / EN 50129)
• Operating Supply Voltage: 24 V DC ±10%
• Power Consumption: Max 24 W
• Operating Temperature Range: -20°C ~ +70°C
• Storage Temperature Range: -40°C ~ +85°C
• Humidity Tolerance: 5% ~ 95% RH non-condensing
• Vibration Resistance: 10–200Hz, 2g continuous vibration
• Shock Resistance: 15g peak shock (11ms pulse)
• Communication Bus: VME industrial backplane bus
• Input Channels: 24 galvanically isolated analog vital input channels
• Output Channels: 12 fail-safe relay output channels
• Isolation Voltage: 2500V AC between field circuit and backplane bus
• PCB Protection Coating: Conformal acrylic coating (IP30 internal cabinet rating)

Function Features

1. Expanded high-density channel layout for large railway station interlocking systems
2. Dual redundant signal sampling circuit for 100% fail-safe operation
3. 10ms full channel self-test cycle with independent fault flag for each I/O channel
4. Hardware interlock logic prevents dangerous false output actuation under single component failure
5. Buffered VME bus interface supporting multi-card rack stacking without signal attenuation

Performance Parameters

• Signal sampling cycle: 10 ms deterministic fixed cycle
• Channel fault detection response time: ≤20 ms
• Relay output switching life: ≥10⁷ mechanical operations
• Analog input measurement accuracy: ±0.2% full scale
• Common-mode noise rejection ratio: ≥120 dB
• MTBF: 195,000 hours at 40°C operating temperature

Material Composition

• Base substrate: FR4 high-Tg flame retardant PCB
• Surface coating: Acrylic conformal protective coating
• Signal relays: Silver alloy contact safety relays
• Isolation components: High withstand voltage optocouplers
• Backplane connector: Gold-plated copper alloy edge connector
• Enclosure: Aluminum alloy rack guide rail frame

Structural Characteristics

• Standard 6U VME single-width PCB form factor
• Expanded front panel terminal block layout for 24 input +12 output wiring
• Individual LED fault indicator per input/output channel
• Back edge VME bus connector for rack data communication
• Reinforced mounting lugs for rack vibration resistance
• Segregated PCB layout for analog signal, digital logic and power supply zones

Working Principle

Advantage Highlights

1. Higher channel density reduces total rack quantity for large station interlocking systems
2. Full SIL4 certification compatible with all Alstom Microrec interlocking control racks
3. Conformal coating enables stable operation in damp tunnel and outdoor trackside cabinets
4. Backward plug-and-play compatible with existing L54E1100 series rack infrastructure
5. Independent per-channel fault diagnosis simplifies on-site maintenance troubleshooting

Applicable Industries

Installation Requirements

1. Install inside IP54 rated sealed industrial control cabinet only
2. Mount on standard 6U VME rack with fixed rail locking screws
3. Field wiring torque limit: 0.6 N·m for terminal block screws
4. Separate safety signal wiring from power cables with minimum 20cm clearance
5. Cabinet forced air cooling mandatory for continuous operation above 50°C ambient

Usage Precautions

1. Complete full rack power shutdown before card hot-swap attempt; no hot plug operation permitted
2. Avoid continuous operation at ambient temperature above 70°C to extend relay service life
3. Prevent conductive dust and water vapor contact with PCB surface
4. Annual terminal block maintenance to remove oxidation and loose wiring
5. Field component repair prohibited; replace entire card upon permanent channel fault alarm