Wiring a DC-Powered System

Wiring a DC-Powered System

The procedure in this section explains how to wire a DC-powered LS2020 switch to a DC power source. This task should be performed only by qualified service personnel or a licensed electrician.

This section applies only to systems with the DC power option. If you have a standard AC-powered system, skip to the section “Installing Fantails.”

For general information on DC-powered LS2020 systems, see the LightStream 2020 Hardware Reference and Troubleshooting Guide. For power specifications, see the LightStream 2020 Site Planning and Cabling Guide.

Preparation for Wiring

Note the following in preparation for wiring a DC-powered LS2020 switch:

The system power connection on the DC power tray is provided by a 3-position terminal block, as shown in Figure 2-3. The –48, –48RTN, and CHS GND connections providing –48VDC power to the system require a minimum of number 10AWG wire for the 24A-rated load. The terminal block is rated to accept up to number 8AWG solid wire. The use of ferrules to terminate these wires is recommended.

The alarm circuit connection to the DC power tray is provided by a smaller 3-position terminal block, also shown in Figure 2-3. The COM, NO, and NC connections providing the circuit breaker alarm indication should be wired with number 22AWG or larger wire. The use of number 6 spade or ring lug terminals for these connections is recommended.

Obtain a slot-tip screwdriver for securing the system power terminals and a Phillips screwdriver for securing the alarm circuit terminals.

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Cisco Systems 2020 manual Wiring a DC-Powered System, Preparation for Wiring

2020 specifications

Cisco Systems, a global leader in networking and cybersecurity solutions, experienced a transformative year in 2020, marked by its commitment to innovation and adaptation in the face of unprecedented global challenges. As the COVID-19 pandemic reshaped the way businesses operated, Cisco responded by enhancing its offerings and focusing on remote work solutions, robust security measures, and the expansion of its cloud capabilities.

One of the main features of Cisco's 2020 portfolio was the enhancement of its Webex platform. With remote work becoming the norm, Cisco Webex proved invaluable for businesses and educational institutions, providing a comprehensive suite of tools for video conferencing, online collaboration, and virtual events. The platform saw significant upgrades, including enhanced security features and improvements in user experience, ensuring seamless communication in a distributed work environment.

In the realm of cybersecurity, Cisco reinforced its dedication with the launch of several new security solutions. The Cisco SecureX platform was introduced as a cloud-native security platform that integrated the company's extensive security portfolio, allowing organizations to have a unified view of their security postures. This move highlighted Cisco's focus on simplifying security management and improving incident response times, recognizing the growing need for comprehensive cybersecurity as remote work became prevalent.

Furthermore, 2020 saw advancements in Cisco's cloud strategy. The company focused on multi-cloud environments, allowing customers to manage their applications seamlessly across various platforms. The integration of technologies such as Application Centric Infrastructure (ACI) and Cisco Intersight provided improved automation, visibility, and control over network resources, essential for businesses navigating hybrid cloud setups.

Cisco also placed a strong emphasis on digital transformation, empowering organizations to transition to a more agile and responsive IT infrastructure. The company introduced innovative solutions to support enterprises in their journeys toward digital transformation, leveraging technologies such as artificial intelligence and machine learning to enhance network performance and operational efficiency.

In addition to its focus on technology and innovation, Cisco was recognized for its commitment to corporate social responsibility. The company actively engaged in initiatives aimed at bridging the digital divide, providing resources and support to underserved communities to promote access to technology and education.

Overall, 2020 was a pivotal year for Cisco Systems, characterized by resilience, innovation, and a profound understanding of the evolving needs of businesses worldwide. Through its comprehensive portfolio of solutions, Cisco not only adapted to the changing landscape but also paved the way for a more connected and secure future.