Product specifications

Power Supply Units - Types SD831, SD832, SD833, and SD834 Appendix A Hardware Units
372 3BSE036351-510 A
SD834 in parallel to increase output power
Fuses and Protective Devices
Recommended primary external fuse:
Table 114. SD834 Schematic and Instructions for parallel use.
Schematic for parallel operation Instructions for parallel use
a) Only SD834 can be used in parallel connection.
b) Adjust the output voltages of all power supplies to
approximately the same value (±500mV). Otherwise,
the DC-OK signal might not work properly.
c) A fuse (or diode) on the output is only required if
more than three units are connected in parallel.
d) Do not continuously load the terminals with more
than 25A. Keep an installation clearance of 15mm
(left/right) between two power supplies and avoid
installing the power supplies on top of each other.
Table 115. Power Supply Units - Fuses and Protective Devices Power Supply Units Types SD83x
Fuse SD831 SD832 SD833 SD834
Primary: Recommended external fuse
(1)
min/max
(1) Microcircuit Breaker (MCB), Characteristic B or a delayed action fuse.
10 - 20A 10 - 20A 10 - 20A 10 - 20A
Primary: Recommended external fuse
(2)
min/max
(2) Microcircuit Breaker (MCB), Characteristic C
6 - 20A 6 - 20A 6 - 20A 10 - 20A
Secondary: Short circuit <8 A <14 A <18 A <40 A
Secondary: Over-Voltage protection <39 V <39 V <39 V <37 V