IES1028-4GS-2F Industrial Ethernet Switches Consists of 22 Ethernet Ports, 2 Fiber Ports and 4 Gigabit (SFP Slot) Ports That Provide An Economical Solution for Your Industrial Ethernet Connection. The IES1028-4gs-2F switches have an operating temperature range of -40 to 75 ° C, and are designated with low consumption and with without fan. The RugGed Hardware Design Makes The IES1028-4GS-2F Perfect for Ensuring That Your Ethernet Equipment Can Withstand The Rigors of Industrial Applications.