The Hirschmann GREYHOUND GMM switch Module is a robust network solution designed for the GRS1040 series, offering a versatile combination of Fast Ethernet/Gigabit Ethernet SFP and TX ports. This module supports both PoE and PoE+ to power connected devices efficiently. It features four SFP slots on ports 1, 3, 5, and 7 with data rates of 100/1000 Mbit/s, alongside four TX RJ45 ports on ports 2, 4, 6, and 8 supporting speeds up to 10/100/1000 Mbit/s. Engineered to operate reliably within a temperature range of 0 deg C to +60 deg C, it meets stringent industry standards including CE, FCC, EN 61131, EN 60950, IEC 61850-3, and IEEE 1613 for substation environments. The GREYHOUND GMM series ensures high-performance networking in demanding industrial conditions.