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13-10
Standard and Optional Equipment
590+ Series DC Digital Converter
AH466701U001, U002, U003 (Frames 4 & 5)
590+ 4 Quad and 591+ 2 Quad; Low, Medium and High Volt
Power supplies for the controller are generated from the single phase auxiliary supply via a
Switched Mode Power Supply. The incoming supply is directly rectified to provide a high
voltage dc power rail. A high voltage transistor switches this rail on to the primary of a high
frequency transformer, the output of which is rectified and smoothed to provide the dc power
supply rails. The +15V dc rail is monitored via a reference element and a control signal returned
via an opto-isolator to the control element of the high voltage switching transistor. The other dc
rails (-15V & +24V dc) are generated via separate secondary windings which are rectified and
smoothed, with a separate SMPS element providing a reg5V dc rail. The SMPS operates
over an input voltage range of 110V to 240V ac
r
10%, 50/60Hz.
Figure 13-10 590+/591+ Power Board, 4 Quad and 2 Quad (AH466701)