Alcatel-Lucent ES640 5ESS 48V DC Alarm Control Unit

The Alcatel‑Lucent ES640 (PWDQAGKUAA) is a dedicated alarm control unit designed for the 5ESS central office switching system. This 48 VDC module provides comprehensive monitoring and reporting of system alarms, environmental conditions, and power status, enabling operators to maintain high availability and rapid fault response in telecom central offices. Its robust design and integration with the 5ESS platform make it a critical component for network reliability.

Overview

The ES640 alarm control unit interfaces with the 5ESS switch's internal alarm bus and external sensors, collecting data on temperature, power supply, fan status, and line card faults. It processes these signals and generates local audible/visual alerts and remote notifications via contact closures or serial communication. The unit is powered by -48 VDC, the standard telecom voltage, ensuring compatibility with central office battery plants. It includes a front panel with LED indicators for quick status assessment.

Key Features

• Compatible with Alcatel‑Lucent 5ESS digital switching systems

• Input voltage: -48 VDC nominal (range -40 to -72 VDC)

• Multiple alarm input channels (dry contacts, analog, or digital)

• Relay outputs for external alarm indication and control

• Front‑panel LEDs for power, major/minor alarms, and status

• Remote monitoring via serial RS‑232 or RS‑485

• Hot‑swappable for maintenance

Technical Specifications

• Power Input: -48 VDC, 1.5 A max

• Alarm Inputs: 16 dry contact inputs (normally open/closed)

• Relay Outputs: 4 Form C relays, 24 VDC/1A

• Communication: RS‑232 (DB9) or RS‑485 (RJ‑45)

• Indicators: Power, Major Alarm, Minor Alarm, AC Fail, Fan Fail

• Operating Temperature: 0°C to 45°C

• Humidity: 5% to 90% non‑condensing

• Dimensions: Standard 5ESS card form factor (approx. 220mm × 180mm)

• Weight: 1.5 kg

Applications

This alarm control unit is deployed in central offices with 5ESS switches, where it monitors the health of the switching system, power plant, and environmental systems (air conditioning, fire detection, water leakage). It is essential for maintaining service level agreements and minimizing downtime.

Integration and Management

The ES640 integrates with the 5ESS maintenance console, allowing operators to view alarm status and history. It also supports remote access for off‑site monitoring. Configuration of alarm thresholds and reporting is performed via the 5ESS system software.

Installation and Maintenance

Install the card in the designated slot of the 5ESS frame, connect external sensor wiring, and apply power. The unit will perform a self‑test and begin monitoring. Maintenance includes periodic verification of sensor inputs and relay outputs, as well as cleaning of connectors.

Conclusion

The Alcatel‑Lucent ES640 alarm control unit provides reliable, centralized alarm management for 5ESS switches, enhancing operational visibility and responsiveness in telecom central offices.