Product Specifications

Input Voltage
40 Vdc to 58 Vdc (48 Vdc nominal)

Output Voltage and Current
The nominal output voltage, the
adjustable output voltage range and
output current for standard models are
shown in Table 1.

Output Voltage Regulation
Versus line: ±0.1%
Versus load: ±0.5%

Output Voltage Ripple and Noise
3 millivolts rms (typical)
30 millivolts peak-to-peak (typical)

Isolation and Grounding
Mutual electrical isolation is provided
between the input circuit, the output
circuit and chassis ground.

Protection
Protection against overloads, shortcircuits
and output overvoltages is
provided electronically. Recovery
to normal operating conditions is
automatic upon removal of the overload
or short-circuit fault. Following an
overvoltage shutdown, input power
to the converter must be removed
and reapplied to resume converter
operation. Protection against accidental
reversal of the dc input-voltage polarity
during installation is provided by a
shunt diode working in conjunction with
the front-panel circuit breaker.

Ambient Temperature Range
Operating: -30ºC to +60ºC
(convection cooling)
Storage: -40ºC to +95ºC

Efficiency
The efficiency reaches 80% at
approximately 15% of full load and
remains above 80% for most of the
load range. The no-load input current
is approximately 100 milliamperes.
Heat dissipation is approximately 340
BTU/hour for 400-watt models and 170
BTU/hour for 200-watt models.

Front-Panel Controls and Indicators
A combination circuit breaker and ON/
OFF switch is provided for input power.
A potentiometer shaft with lockingnut is provided to adjust the output
voltage level. An optional voltmeter and
ammeter display the dc output.

Physical Characteristics
Weight is less than 15 pounds.
Brackets are provided for 19-inch or
23-inch relay rack mounting. A cover
panel protects the recessed rear panel
and wiring connections.

STANDARD OPTIONS
• Output voltmeter and output
ammeter
• Output series diode for parallelredundant
operation of multiple
converters
• Auxiliary Form C contacts for
remote indication of improper
output (converter fail)
• Balanced load sharing between
converters being paralleled for
additional power