B&K 1652 Manual De Usuario

Descargar
Página de 88
 
1
 
INTRODUCTION 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The B & K-Precision Models 1651A & 1652 Triple Output 
DC Power Supplies are high quality, general purpose dc power 
sources.  They provide two supplies with a 0-24 volt dc output 
and one with a fixed 5 volt dc output.  The 0-24V supplies are 
adjustable and are capable of current output of 0-0.5 amp.  The 
fixed 5V supply has a current output of 0-4 amps, allowing it 
to handle extensive digital logic circuitry.  Two panel mounted 
meters can simultaneously monitor the output current and 
output voltage of either of the 0-24V supplies. 
 
  The two 0-24 volt supplies can be operated independently or 
in one of two tracking modes.  In the series tracking mode, the 
“B” supply tracks the voltage of the “A” supply.  In the series 
tracking mode the “A” and “B” supplies are connected in 
series, allowing a single output of 0-48V at up to 0.5 amps.  In 
the parallel tracking mode, the two supplies are connected in 
parallel, allowing a single 0-24V output at up to 1 amp. 
 
  Both 0-24 volt supplies may be used in constant voltage or 
constant current applications.  The crossover from constant 
voltage to constant current modes is smooth and automatic.  
LED’s indicate the Constant Current mode of operation.  In 
constant voltage applications, a current limit may be preset.  
When load variations cause the current to reach the preset 
limit, the unit then regulates output current rather than output 
voltage.  Current limits are adjustable from 6% to 100% of 
maximum.  In constant current applications, the maximum 
voltage may be preset.  When load variations cause current to 
drop below the regulated value, the unit reverts to regulated 
voltage operation at the preset value. 
The fixed 5V supply is ideal for powering digital logic 
circuitry.  The 0-4 amp capacity allows the supply to be used 
for large circuits.  Built-in overload protection automatically 
limits the current output to a maximum of 4 amps.  An LED 
indicator lights when the supply is overloaded. 
 
These supplies exhibits excellent regulation and low ripple 
characteristics.  The circuit design incorporates a pre-regulator, 
which greatly reduces internal power dissipation at low output 
voltages. 
 
Reverse polarity protection prevents accidental damage to 
the power supply from improper connection to an external 
voltage, and current limiting protects the equipment being 
powered, as well as the power supply. 
 
The output is isolated from chassis and earth ground, which 
permits full flexibility of connections. When needed, the (+) or 
(-) polarity may be strapped to ground, or either polarity may 
be floated to an external voltage. Additionally, the two “main” 
volt supplies can be used as a “split supply” with two positive 
voltages and a common negative, two negative voltages and a 
common positive, or one positive, one negative, and a 
common. All of these configurations can be used with either 
matching (tracking) or differing (independent) voltages.