User manual 3COM S7502E CHASSI1, W/FAN

[. . . ] H3C S7500E Series Ethernet Switches Installation Manual Hangzhou H3C Technologies Co. , Ltd. http://www. h3c. com Manual Version: T2-080406-20090526-C-1. 06 Copyright © 2007-2009, Hangzhou H3C Technologies Co. , Ltd. and its licensors All Rights Reserved No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Hangzhou H3C Technologies Co. , Ltd. Trademarks H3C, , Aolynk, , H3Care, , TOP G, , IRF, NetPilot, Neocean, NeoVTL, SecPro, SecPoint, SecEngine, SecPath, Comware, Secware, Storware, NQA, VVG, V2G, VnG, PSPT, XGbus, N-Bus, TiGem, InnoVision and HUASAN are trademarks of Hangzhou H3C Technologies Co. , Ltd. All other trademarks that may be mentioned in this manual are the property of their respective owners. Notice The information in this document is subject to change without notice. [. . . ] The resistance between human body and the ground should be 1 to 10M ohm. Laser Safety Some LPUs of the S7500E series have optical interfaces. In operating status, it is prohibited to stare into the open optical interface because the laser being transmitted through the optical fiber will produces a small beam of light, it has very high power density and is invisible to human eyes, when a beam of light enters the eye, retina may be burned. Staring at the laser beam inside the fiber could hurt your eyes. Examining Installation Site The S7500E series can only be used indoors. To ensure that the switch works normally and expand its service life, the installation environment shall meet the requirements below. 2-2 Temperature/Humidity Requirements To ensure the normal operation and service life of a switch, a certain level of temperature and humidity should be maintained in the equipment room. If the humidity in the equipment room is too high for a long time, it will lead to bad insulation of the insulating material or even creepage. Sometimes, the mechanical performance changes of material, the rustiness and corrosion of some metal parts are also likely to occur. If the relative humidity is too low, the captive screws may become loose due to the shrinkage of the insulation washers. Meanwhile, the electrostatic is likely to be produced in the dry environment, which will jeopardize the CMOS circuit of the switch. The higher the temperature, the greater the damage it will do on the switch. High temperature for a long time will speed up the aging process of the insulation materials, greatly lower the reliability of the switch and therefore affect its service life seriously. Table 2-1 Temperature/humidity requirements Temperature Working condition 0 C to 45 C (32 F to 0 113 F) 0 0 0 Relative humidity Working condition 0 Idle condition ­40 C to +70 C (­40 F 0 to +158 F) 0 0 Idle condition 5% to 95%, noncondensing 10% to 95%, noncondensing Cleanness Requirements Dust is a big harm for the normal operation of the switch. The indoor dust accumulated on the chassis can cause electrostatic adsorption, resulting in the poor contact of the connector or metal contact point. This happens more frequently when the relative indoor humidity is low, which will not only shorten the service life of the switch, but also cause communication failure. The required specifications on dust content and particle diameter in an equipment room are shown in Table 2-2. Table 2-2 Dust concentration limit in the equipment room Physical active substance Dust particle Note: Dust particle diameter 5µm 4 Concentration limit (particles/m³) 3 x 10 (No visible dust on desk over three days) Except the requirements on dust, rigorous requirements on ingredient of salts, acids and sulfides of air in an equipment room are also set. These harmful gases will speed up the metal corrosion and the aging processes of certain parts. The equipment room should be protected from the invasion of harmful gases such as SO2, H2S, NO2, NH3 and Cl2, the value limits of which are shown in the following table: Table 2-3 Limits on harmful gases in the equipment room Gas SO2 H2S NH3 0. 2 0. 06 0. 05 Maximum concentration (mg/m3) 2-3 Gas Cl2 0. 01 Maximum concentration (mg/m3) Anti-static Requirements Any possible interference sources, no matter outside or inside the system, affect the switch in use may in a way of capacitance coupling, inductance coupling, radiation of electromagnetic wave, common impedance (including the grounding system) coupling or conducting line (power line, signaling line and transmission line etc. ). Therefore, the following should be considered: Adopt effective measures to protect the power supply system against the power grid interference. Separate the working ground of the switch from the ground device of the power supply equipment or lightning-protection ground device as far as possible. Keep the switch far away from the radio launcher, radar launcher, and high-frequency devices working in high currents. If necessary, adopt electromagnetic shield. Grounding Requirements A good grounding system is the basis for a switch to work stably and reliably and the important guarantee of lightning protection, anti-interference and ESD. A user should provide good grounding system for the switch and the grounding resistance should be less than 1. 5 ohm. Power Supply Requirements For the power supply requirements, refer to section 1. 2. 3 "Power Supply System" in Chapter 1 "Product Overview". Installation Planning Since the S7500E series are a kind of complex equipment, it is necessary to make a good plan and arrangement concerning installation position, networking mode, power supply and cabling before installation. Installation Space Requirement For better heat dissipation and equipment maintenance, it is recommended that the front and back of the switch should be at least one meter away from walls or other devices, and that the left and right of the switch should be at least 0. 8 meters away from walls. If a rack is to be installed, the headroom should be 3 meters at least. If the above-mentioned requirements are not satisfied, it will be very inconvenient to install a rack or install air filters on the switch. Rack-Mounting Requirements Before rack-mounting a switch, make sure the rack meets the following requirements: Better mount a switch in an open rack. [. . . ] When operation is performed in a damp environment, make sure that water is kept off the equipment. Muss in einem feuchten Umgebung gearbeitet werden, ist sicherzustellen, dass kein Wasser in die Ausrüstung dringen kann. Non-standard and improper high voltage operations may result in fire and electric shock. Therefore, AC cable bridging and wiring through a certain area must follow the local rules and regulations. [. . . ]