The FS-501Z series is an unmanaged industrial Ethernet switch offering 5 ports of 10/100Base-TX or 4 ports of 10/100Base-TX plus 1 port of 100Base-FX, with fiber options suitable for distances up to 120km. It operates within a temperature range of -10°C to 60°C (with testing at -20°C to 70°C) and supports a wide voltage range of 12 to 48VDC. Compliance with various EMI and safety regulations, along with features like DIN-rail mounting and automatic negotiation, makes it suitable for industrial environments.