When a control circuit requires 28 V — to drive older relay logic, to compensate for voltage drop over long cable runs, or to match a legacy standard — the 6EP1334‑2BA20 delivers exactly that, without modification. It is a native 28 V/10 A stabilized power supply from the SITOP modular range, adjustable from 24 V to 28.8 V via a front‑panel potentiometer. The wide‑range input (85‑264 V AC) works on any industrial single‑phase supply, and the unit operates from ‑20 °C to +70 °C with natural convection, making it suitable for outdoor cabinets as well as factory floors. With an efficiency of 89 %, the heat dissipated into the panel is low, and the mean time between failures (MTBF) exceeds 500 000 hours under nominal conditions.

Performance and Adjustability

• 280 W output: 10 A at 28 V, enough for several contactors, solenoid valves, or a complete row of I/O modules. When more power is needed, two units can be connected in parallel to deliver up to 560 W.
• Adjustable voltage: the output can be set between 24 V and 28.8 V. Use the 24 V setting for standard controls or raise it to 28 V to compensate for voltage drop on long cable runs to remote devices.
• Current‑limiting overload protection: the output characteristic is constant‑current with a threshold between 1.1 and 1.4 × In. A short‑circuit or overload simply limits the current; once the fault is removed, the output recovers automatically without user intervention.
• Low ripple: residual ripple below 150 mV peak‑to‑peak, with spikes under 240 mV, meeting the demands of sensitive electronic loads.

Hazardous Area Ready

• ATEX / IECEx certified: the power supply is approved for installation in Zone 2 explosive atmospheres, making it suitable for chemical, pharmaceutical, and oil & gas applications.
• UL 508 Listed, GL approved: expands the operational envelope to North American panels and marine installations.
• Safety isolation: galvanic isolation between input and output meets SELV requirements per EN 60950‑1.

Technical Specifications