ABB 3HAC024775-003

ABB 3HAC024775-003

Sales Manager :Yuki  / Phone: +8617359287459

Email: sales15@amikon.cn  / Skype:+8617359287459

  Power Supply Units Types SD821/822/823 – Description  

ABB recommends the use of these robust and reliable power supply units (PSUs) for
providing power to the AC 800M Controller when connected to an industrial mains network
of installation category III. All three PSUs can be used for both non-redundant and
redundant applications.

The three PSUs were designed as switch mode power converters, converting AC mains
supply voltage to a regulated 24V DC output. Rated output capacity:
• SD823 = 24 Volts DC regulated @ 10 A
• SD822 = 24 Volts DC regulated @ 5 A
• SD821 = 24 Volts DC regulated @ 2.5 A

The mains input voltage is set to either 115 or 230 V by means of a switch mounted on
the face of the unit. The factory default position for this switch is 230 V.

The output voltage of all three PSUs is a regulated, low noise, 24 V DC. A green LED
on the PSU front panel indicates that the output circuit is providing the correct output
voltage level. The double connectors provided on the 24 V DC output terminals allow
for connecting more than one piece of equipment.

A surge current limiter within the PSU circuit provides a soft-start feature. Consequently
the controlled power-on of a PSU will not trip fuses or ground-fault circuit breakers. In
addition, the normal disturbances that occur within an industrial main network will not
result in transient fault conditions or tripping.

This results in the surge current limiter effectively reducing the peak inrush current caused
by a power disruption, to a level the PSU can tolerate.

This soft-start, surge current limiter facility simplifies designing the system power
distribution circuits.

E-mail : sales15@amikon.cn

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