Appendix C Translated Safety Warnings

Switch Relays Warning

Attention Les relais à commutateur ont une intensité nominale d'un ampère (A) et une limitation de tension de 30 VCC (0,3 A à 125 VCA). Dans un environnement à risque, il est dangereux de dépasser ces limitations.

Un arc électrique peut se produire lors de la connexion ou de la déconnexion des câbles de relais lorsque l'alimentation du côté terrain est activée. Si le site est dangereux, cela peut causer une explosion dans les installations commutées. Avant de continuer, vérifiez que l'alimentation est coupée et que le site ne présente aucun danger.

Warnung Die Switch-Relais haben eine Nennstromstärke von 1 A und eine Höchstspannung von 30 VDC bzw. eine Stromstärke von 0,3 A bei einer Höchstspannung von 125 VAC. In einem explosionsgefährdeten Gebiet sollten diese Werte aus Sicherheitsgründen nicht überschritten werden.

Wenn Sie die Relaiskabel anschließen oder abnehmen, während die Stromzufuhr zum Alarmgerät eingeschaltet ist, kann sich ein elektrischer Bogen bilden. Dies kann bei Installation eines Switches in einer Gefahrenzone zu einer Explosion führen. Vergewissern Sie sich daher, bevor Sie fortfahren, dass die Stromzufuhr ausgeschaltet ist, oder es sich beim gewählten Standort nicht um ein explosionsgefährdetes Gebiet handelt.

Avvertenza I relè switch hanno una capacità nominale di 1 amp e una tensione limite di 30 VCC e capacità di 0,3 amp a una tensione limite di 125 VCA. È pericoloso superare questi limiti in un ambiente pericoloso.

La connessione o disconnessione dei fili di relè con l'alimentazione lato campo inserita, può determinare la formazione di un arco elettrico. Ciò può causare un'esplosione in caso di installazioni di switch in aree pericolose. Prima di procedere, accertarsi che l'alimentazione sia disinserita o l'area non sia pericolosa.

Advarsel Bryterreléene er merket 1 A og har en spenningsgrense på 30 V likestrøm og 0,3 A med en spenningsgrense på 125 V likestrøm. Det medfører fare å overskride disse grensene i et farlig område.

En elektrisk bue kan oppstå når du tilkobler eller frakobler relétråder med en strømførende ekstern alarmenhet. Dette kan forårsake eksplosjon i bryterinstallasjoner i farlige områder. Før du fortsetter må du være sikker på at strømmen er fjernet eller at området ikke er farlig.

 

Catalyst 2955 Hardware Installation Guide

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Cisco Systems Catalyst 2955 manual Appendix C Translated Safety Warnings Switch Relays Warning

Catalyst 2955 specifications

The Cisco Systems Catalyst 2955 is a robust and versatile Ethernet switch designed for enterprises seeking reliable Layer 2 switching capabilities. Known for its steadfast performance and extensive feature set, the Catalyst 2955 is particularly favored for environments requiring high-density connectivity and advanced traffic management.

One of the hallmark features of the Catalyst 2955 is its support for IEEE 802.1Q VLAN tagging, which allows for efficient traffic segregation and helps improve network security. The switch can handle up to 256 virtual LANs, supporting a more organized network structure and optimized resource allocation. This VLAN capability is crucial for businesses that need to segment their networks for various departments or applications while maintaining efficient communication between them.

The Catalyst 2955 is equipped with a comprehensive Quality of Service (QoS) mechanism, which prioritizes critical applications and ensures that voice, video, and data traffic receive appropriate bandwidth. By providing features such as classification, marking, queuing, and congestion avoidance, the switch helps meet the demands of real-time applications, thereby enhancing user experience and productivity.

Another remarkable technology integrated into the Catalyst 2955 is Spanning Tree Protocol (STP), which prevents loops in redundant network connections. Enhanced with features like Rapid Spanning Tree Protocol (RSTP), this switch minimizes downtime by allowing for quicker convergence times in case of topology changes. The ability to support both STP and RSTP is vital for maintaining network stability and performance.

The Catalyst 2955 is also designed with network management and monitoring in mind. It includes features like Simple Network Management Protocol (SNMP), which enables administrators to manage network resources effectively and troubleshoot issues more efficiently. With support for Cisco’s proprietary software, it offers insights into traffic patterns and usage statistics that can aid in maintaining optimal network health.

Physical characteristics of the Catalyst 2955 include various configurations with either 24 or 48 ports, suitable for different deployment scenarios. The switch is designed for rack mounting, making it an ideal solution for data centers and enterprise networks where space is a consideration.

In summary, the Cisco Systems Catalyst 2955 stands out for its solid Layer 2 functionality, VLAN support, QoS capabilities, network stability features such as STP, and extensive management tools, making it an excellent choice for organizations aiming to enhance network resiliency and performance. Its balance of performance and manageability continues to make it a viable option in the competitive landscape of networking equipment.