Introduction
The PT-7728 is designed to meet the demands of power substation automation systems (IEC 61850-3, IEEE 1613), and railway applications (EN 50121-4), and also features critical packet prioritization (GOOSE and SMVs) and a built-in MMS server. The PT-7728’s Gigabit and Fast Ethernet backbone, redundant ring, and 24 VDC, 48 VDC, or 110/220 VDC/VAC dual isolated redundant power supplies increase the reliability of your communications and save on cabling/wiring costs. The modular design of the PT-7728 also makes network planning easy, and allows greater flexibility by letting you install up to 4 Gigabit ports and 24 Fast Ethernet ports. Along with the optional front or rear wiring, these features together make the PT-7728 suitable for a variety of industrial applications.

FEATUREs and Benefits
• IEC 61850-3, IEEE 1613 (power substations), and EN 50121-4 (railway
   applications) compliant
• IEC 62439-3 Clause 4 (PRP) and Clause 5 (HSR) compliant1
• Built-in MMS server based on IEC 61850-90-4 switch data modeling for
   power SCADA
• Complies with a portion of EN 50155 specifications
• Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches),2 RSTP/
   STP, and MSTP for network redundancy
• VLAN Unaware: Supports priority-tagged frames to be received by specific
   IEDs
• Up to 12 ports with M12 connectors
• Isolated redundant power inputs with universal 24 VDC, 48 VDC, or 110/220
   VDC/VAC power supply range
• -40 to 85°C operating temperature range