The FE40FI45 part of the TQ solution is a lightweight, fanless, stackable Ethernet switch that is designed for industrial environments. It is a Managed Industrial Layer-2 switch with four 10/100Mbps Fast Ethernet ports, four 10/100/1000Mbps Gigabit Ethernet ports, and four optical Gigabit interfaces. It supports Power over Ethernet (PoE) and is powered by a 24V DC power supply. The FE40FI45 has an extended temperature range (-30 to +75°C) and is designed to withstand harsh environmental conditions. It is certified to IEC 61508, EMC, and EN 50155. The switch also features an advanced security suite, including 802.1X port-based authentication, SSH/SSL, ACLs, and advanced management functions.