32000 Series
Open Frame AC/DC Regulated Linear Power Supplies
These high quality linear regulated power
supplies provide outstanding value and are
designed for ease of application and long
trouble-free life. They will accommodate AC
inputs from 100 V to 240 V and provide a
wide range DC outputs with very low ripple.
All 32000 series power supplies are built
around industry-standard case sizes to
simplify installation and a 3.75 kV isolation
safety transformer. For additional safety
the transformer primary is protected
from thermal overloads by a thermal
fuse. This fuse will blow if a transformer
temperature of 130°C is exceeded. Every
unit incorporates a safety earth tag.
All models are fitted with automatic
foldback current limiting. An overvoltage
protection (OVP) circuit protects sensitive
loads against excessive voltage such as
in TTL logic. OVP is a standard feature of
all 5 V output units and an option on all
other units.
The remote sensing feature, included in
almost all 32000 series power supplies, may
be used to compensate the voltage drop
across the load lines. All dual-output power
supplies feature a unique anti-latch circuit to
minimise common mode latch up.
General Specificat ions
A.C. Input 100/120/220/240 V AC +10%, -12%, 47 to 60 Hz
D.C. Output See Voltage/Current Rating Chart. Adjustment range
±5% minimum.
Line Regulation ±0.05% for a 10% line change.
Load Regulation ±0.05% for a 50% load change.
Output Ripple 2 V to 15 V units: 5.0 mV PK-PK maximum
20 V to 28 V units: 0.02% PK-PK maximum
Transient Response 50 ìs for a 50% load change
Short Circuit and
Overload Protection Automatic current limit/foldback
Overvoltage Protection Built-in on all 5 V outputs. Set at 6.2 V ±0.4 V
Other models use optional overvoltage protection.
See Option 4 overleaf
Remote Sensing Provided on most models, open sense load
protection built in.
Stability ±0.3% for 24 hour period after 1 hour warm-up
Temperature Rating Standard Range: 0°C to +50°C full-rated,
derated linearly to 40% at 70°C
Extended Range: -40°C to +50°C full-rated,
derated linearly to 40% at 70°C
TEMPERATURE DERATING CURVE
Temperature Coefficient ±0.03%/°C maximum
Efficiency (typical) 5V unit: 45%; 12 V and 15 V units: 55%; 24 V units: 60%
Isolation Input to ground: 3750 V AC min.
I nput to output(s): 3750 V AC min.
Output to ground: 500 V AC min.
Leakage current (live to ground): 5 ìA max.