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PSS44/76-500L

The ABB PSS44/76-500L is a Heavy-Duty, High-Current Power Supply System from ABB's PSS (Power Supply System) modular product range. It is designed as a central, high-capacity DC power source for industrial automation and process control systems, specifically to reliably power a large number of distributed I/O modules, sensors, actuators, and field devices in demanding environments.

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Technical Data Parameter Specification / Value (Based on PSS Series Typical Data) Product Type Modular High-Capacity DC Power Supply System Input Voltage (AC) 3-phase, 400/480 V AC (Typical for PSS high-power modules) Input Frequency 50/60 Hz Output Voltage (DC) 24 V DC (Nominal, adjustable within a range, e.g., 24-28V) Rated Output Current The core PSS44/76 module likely provides 76 A or a similarly high current at 24V DC. The exact value must be confirmed from the official datasheet. Rated Output Power Approximately ~1.8 kW (if 76A @ 24V). Redundancy Support Yes. Modules can be configured in N+1 parallel redundancy with load sharing and hot-swap capability to ensure maximum system availability. Efficiency High efficiency, typically > 90%. Power Factor (PF) High, typically > 0.95. Protection Features Overload, overvoltage, short-circuit, and overtemperature protection. Monitoring & Signals Provides remote alarm signals (e.g., "Power Good", "Module Fail") via relay contacts or a system bus. Cooling Fan-cooled for high power dissipation. Connection Heavy-duty screw terminals for input and high-current output connections. Mounting Designed for mounting in a 19-inch rack or cabinet (the -500L likely indicates a specific cabinet depth of 500mm). Operating Temperature Typically 0°C to +60°C (with derating above a certain temperature). Approvals CE, cULus, ATEX (for hazardous areas - specific variants), IEC/EN 60950-1, IEC/EN 62133.