Main Features

• Simple DIN-rail mounting.
• Class I equipment (when connected to Protective Earth (PE)).
• Over-voltage Category III suitable for connection to primary circuit in Category III TN distribution systems.
• Electrical isolation protection from primary circuit to secondary circuit.
• Equipped with SELV and PELV protective extra-low voltage.
• Output units feature overcurrent (current limit) and overvoltage protection (OVP).
• SD834 can parallel output to increase output power.
• Both a.c. and d.c. input supported by SD831 and SD834.
• SD834 provides a DC-OK relay signal.

Equipment Classification

The power supply units (PSU) are designed to meet the technical requirements for electrical safety stated in the EN 50178 European Standard, as well as additional safety and functionality requirements specified in EN 61131 and UL 508. The secondary output circuitry is suitable for SELV or PELV applications. SELV design complies with EN 50178, EN 60950, and VDE 0100 Part 410 standards. For PELV applications, it complies with EN 50178 and UL 508, listed under E 198865.

Protection Rating

• IP20 according to EN 60529 and IEC 60529 standards.
• Protection Class I according to EN 50718; 3.56.

Electrical Parameters of SD834

The power supply unit is switch-mode converters that can convert mains a.c. or d.c. voltage to 24VDC output. The technical data is as follows:

Dimensions Width x Height x Depth

• 82 mm x 127 mm x 124 mm (3.23 in.*5 in.*4.88 in.)

Weight

• 1200 g (2.6 lbs)