KEPCO RA 19-4B - Manual (Page 25)

RA 19-4B 011409
2-15
2.4.3 SERIES OPERATION
HSF power supplies may be connected in series to obtain higher output voltages, however the
maximum current must not exceed 35 Amperes (the current carrying capacity of the internal
printed circuit board) and is limited to the maximum current of one of the power supplies con-
nected in series. The power supply with the lowest rated value of maximum current establishes
the maximum load current allowed. Series configurations can only be accomplished by external
wiring of the I/O mating connector. Blocking diodes are incorporated in the HSF power sup-
plies. V+ of one supply must be connected to V– of the next supply at the DC OUTPUT terminal
block.
DIP switches (positions 1 through 5) between series-connected supplies and at both ends of the
series-connected group must be set to OFF (open). Sensing can be either local or remote (PAR.
2.4.1.3). Local sensing requires external wiring (PAR.2.4.1.2). Figure 2-10 illustrates PS4, PS5
and PS6 connected in series.
FIGURE 2-10. SERIES CONFIGURATION, SIMPLIFIED DIAGRAM