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Programmable Power
Supplies are used wherever variable dc voltage and current
are required. They are found in automated test systems, test
departments, research and development departments, and laboratories,
hence they are often referred to as "laboratory power supplies",
"bench power supplies", or "variable power supplies".
 These
units have control knobs on the front to vary both the dc voltage
and current at the output, and in addition to these front panel
controls, programmable power supplies are often used where remote
control and monitoring facilities are needed. Therefore, all
the units supplied by CP Power & Automation Ltd have analogue
remote control and monitoring as standard, along with the option
for an installed IEEE488.2 (GPIB) interface card with LabVIEW
driver, for networking and linking to a PC. Some units also have
RS232 or RS485 built in as standard.
Important features include overvoltage protection, and adjustable
current limit to inhibit accidental setting of levels which might
damage the equipment being powered. Many units can also be set
to the correct levels "offline" and then the output
switched on once the levels are correct.
An area of growth at the moment for programmable power supplies
is the Automotive sector where consideration of increased voltages
in Vehicles (e.g. 42Vdc) has prompted investment in test equipment
to research and test at these increased voltage levels. All units
can be provide as bench top units or as rack mounted units with
front plates for incorporation into a cabinet.
CP Power & Automation provide units with voltage ranges
from 0 - 6Vdc up to 0 - 600Vdc, and with current ranges from
0 - 0.5A up to 0 - 1000A. In terms of power these range from
30W units up to 32kW units which can also be operated in parallel
or master/slave modes up to 2MW.
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