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Product highlights

5-port 10/100 Base-TX
Automatic MDI/MDI-X crossover for plug-and-play
Store-and-forward architecture
Full duplex IEEE 802.3x and half duplex backpressure flow control
DIN-Rail mounting (only 33 mm)
10/100 Mbps speed auto negotiation
Power supply: 10~30 VDC (NS-205), 12~56VDC (NS-205A)
Operating temperature range: -40°C ~ +75 °C

The NS-205 and NS-205A are 5 port ethernet switches which support 10/100 Base-TX transmission,  10/100M auto-negotiation and auto MDI/MDI-X function. These two last functionalities allow the NS-205 and NS-205A to be fully plug-and play: they can detect automatically the used transmission speed (10 Mbps or 100 Mbps), as well as the type of ethernet cable used for the connection (crossed or not). Therefore, the use is made simple, and there is no need for any configuration.

Each port has its own LED, to verify the transmission working status. Further smart functionalities are provided to cope up with the provide robust data transmission: the RJ-45 ports are shielded, a "soft start" function with overload protection is provided, and a high-low voltage protection protects the switch for electrical shocks. Each ethernet port has a memory buffer supporting a store-and-forward mechanism, which ensures a reliable transmission without data loss.

NS-205A is the newest generation of the NS-205 classical 5-port switch. The main improvement are a wider input voltage range (+12 ~ +56 VDC instead of 10~30 VDC) and a higher memory bandwidth (3.2 Gbps instead of 1.4 Gbps). Both switches are very compact (only 33 mm wide) and can be mounted on DIN-Rail.