Alcatel‑Lucent 111381 Power Distribution Module

The Alcatel‑Lucent 111381 is a dedicated power distribution module designed for use in telecom chassis and subracks. This unit receives –48 VDC input from the main power feed and distributes it to multiple line cards, control modules, and cooling fans via fused and monitored output channels. It ensures that each load receives clean, protected power while providing fault isolation and alarm reporting in case of overcurrent or short‑circuit conditions.

The module incorporates individual circuit breakers or fuses per output channel, with visual indicators for blown fuses and active status. It also includes voltage and current monitoring sensors that report to the system controller via an I²C or analog interface. This enables remote monitoring of power consumption and early detection of potential failures.

Its compact form factor allows installation in a dedicated power slot or as a mezzanine module. The 111381 is fully hot‑swappable, enabling replacement without affecting downstream modules.

Technical Specifications

• Product Type: Power Distribution Module

• Part Number: 111381

• Input Voltage: –36 to –72 VDC (nominal –48 VDC)

• Number of Output Channels: 12 (fused)

• Output Current per Channel: 5 A (max)

• Total Output Current: 60 A (max)

• Fuse Type: Automotive‑style or thermal circuit breaker

• Monitoring: Voltage (each channel), current (total or per group)

• Status Indicators: LED per channel (green = OK, red = fault)

• Alarm Outputs: Dry contact for remote alarm

• Connectors: 2 x high‑current power connectors (input), 1 x 50‑pin (output)

• Power Consumption: 10 W (logic & monitoring)

• Operating Temperature: –20°C to +65°C

• Dimensions: 1U x 19 inches (rackmount) or subrack plug‑in

• Compliance: NEBS, RoHS

Key Features

• Individual channel fusing protects downstream circuits.

• Visual and remote fault indication speeds troubleshooting.

• Hot‑swappable for zero‑downtime maintenance.

• Wide input voltage range accommodates battery variations.

• Compact design saves valuable chassis space.

Deployment Scenarios

Installed in central office racks, outdoor cabinets, and enterprise comms rooms to distribute power to multiple shelf components. Used in Alcatel‑Lucent 7750, 7450, and 7210 platforms, as well as in optical transport shelves.

Maintenance

Regularly check fuse status LEDs. Replace blown fuses with identical rating. Keep vents clear for cooling.

Conclusion

The Alcatel‑Lucent 111381 power distribution module provides a reliable, manageable way to distribute and protect DC power in telecom systems, ensuring operational continuity and safety.