Local Operation; Floating And Polarized Output - Ametek SPS A Series Operation Manual

AMREL SPS-A Series

LOCAL OPERATION

3.3
The SPS-A Series power supply is shipped from the factory configured for
local voltage/current control and local voltage sensing. The ANALOG
CONTROL connector is supplied with a mating connector with remote
output ON/OFF jumpered for ON (terminal 5 shorted to terminal 6).
WARNING!
The power-up factory default state is output enabled.
1. Prior to turning the unit on, rotate the voltage and current potentiometers fully
counterclockwise (minimum output).
2. Turn the power ON and adjust the voltage and current to the desired output.

3.3.1 FLOATING AND POLARIZED OUTPUT

The SPS-A Series supply can be set up for a Positive or Negative supply,
as well as standard operation as a floating output supply.
F
LOATING
The output terminals are normally floating from chassis ground. No extra
steps or connections are required for a floating output.
P
OSITIVE
Attach the negative output terminal to the supply chassis. The output
reference is now chassis ground. When the output voltage is set or
programmed, the supply will output a positive potential from chassis ground.
N
EGATIVE
Attach the Positive output terminal to the supply chassis. The output
reference is now chassis ground. When the output voltage is set or
programmed, the supply will output a negative potential from chassis ground.
CAUTION!
Floating the negative output terminal floats the power supply's internal control
circuitry common level to the same potential as the negative output terminal. On a
standard non-isolated supply the common of the analog control connector (J1)
floats at the same potential as the negative output terminal. Damage may occur if
the non-isolated analog control connector of a supply is connected to an external
ground referenced input/output device. Such a connection creates ground loop
currents. To correct ground loop problems the Isolated Analog option is advised in
order to isolate the external ground reference signals from the internal control
circuitry of the supply.
M550129-01 Rev A
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UTPUT
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UPPLY ETUP
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Operation
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