The RS20/30 Unmanaged Ethernet switches are ideal for applications that are less dependent upon the features of switch management while maintaining the highest feature-set for an unmanaged switch. Features include: from 8 up to 25 ports Fast Ethernet with options for up to 3x fiber ports or up to 24 fast Ethernet and option for 2 Gigabit Ethernet uplink ports SFP or RJ45 redundant power inputs via dual 24 V DC, fault relay (triggerable by loss of one power input and/or the loss of the link(s) specified), auto-negotiating and auto crossing, variety of connector options for Multimode (MM) and Singlemode (SM) fiber optic ports, choice of operating temperatures and conformal coating (standard is 0 °C to +60 °C, with -40 °C to +70 °C also available), and variety of approvals including IEC 61850-3, IEEE 1613, EN 50121-4 and ATEX 100a Zone 2.