Environmental Requirements

Please read and familiarize yourself with the following requirements.

The switch must be installed in a clean, dust-free environment. Otherwise, the device may be damaged by electrostatic adherence.
Maintain the temperature @airflow front to back within 0º - 45º C @900m, and humidity within 5% - 95%.
The device must work in the range of AC power input: ~100 - 127 VAC & ~200 - 240 VAC (47-63Hz).
The device must be installed in a dry and cool place. Leave sufficient spacing around the device for good air circulation.
The device must be well grounded in order to avoid electrostatic discharge (ESD) damage and physical human injury.
Avoid direct sunlight and keep the chassis away from heat and strong electromagnetic interference sources.

Dust and Particles

Dust is harmful to the operation of the DS2000.

Dust may lead to electrostatic adherence, especially under low relative humidity, resulting in poor contact of metal connectors or contacts. Electrostatic adherence may result in reduced product lifespan and increased chance of communication failures. The recommended value for dust content and particle diameter in the site is shown below.

Table 1. Environmental Requirements: Dust
Max Diameter (µm)	0.5	1	3	5
Max Density (particles/m³)	1.4×10⁵	7×10⁵	2.4×10⁵	1.3×10⁵

Airborne salt, acid and sulfide are also harmful to the device. Such harmful gases will aggravate metal corrosion and the aging of some parts. The site should avoid harmful gases, such as SO2, H2S, NO2, NH3 and Cl2, etc. The table below details the threshold values.

Table 2. Environmental Requirements: Particles
Gas	Average (mg/m³)	Max (mg/m³)
SO₂	0.2	1.5
H₂S	0.006	0.03
NO₂	0.04	0.15
NH₃	0.05	0.15
Cl₂	0.01	0.3

Temperature and Humidity

Although DS2000 is designed to use multiple internal fans, the site should still maintain appropriate temperature and humidity. High-humidity conditions may cause increased electrical resistance and degradation of mechanical properties and corrosion of internal components. Extreme low relative humidity may cause the insulation spacer to contract, making the fastening screw insecure. Furthermore, in dry environments, static electricity is liable to be produced and cause harm to internal circuits. Temperature extremes may cause reduced reliability and premature aging of insulation materials, thus reducing the working lifespan of the switch.

Table 3. Environmental Requirements: Temperature and Humidity
Temperature (airflow front to back):		Relative Humidity
Long-term condition	Short-term condition	Long-term condition	Short-term condition
0º - 45º C @900m	º - º C	5% - 95%	% - %


Temperature (airflow back to front):		Relative Humidity
Long-term condition	Short-term condition	Long-term condition	Short-term condition
0º - 45º C @900m	º - º C	5% - 95%	% - %

Note: A sample of ambient temperature and humidity should be taken at 1.5m above the floor and 0.4m in front of the rack, with no protective panel covering the front and rear of the rack. Short term working conditions refer to a maximum of 48 hours of continued operation and an annual cumulative total of less than 15 days. Adverse operation conditions refer to the ambient temperature and relative humidity value that may occur during an air-conditioning system failure, and normal operation conditions should be recovered within 5 hours.