TDK-Lambda Genesys User Manual page 47

Twisting the load wires reduces the parasitic inductance of the cable, which could
produce high frequency voltage spikes at the load and the Output of the Power
Supply (because of current variation in the load itself).
The impedance introduced between the Power Supply output and the load could
make the ripple and noise at the load worse than the noise at the power supply rear
panel output. Additional filtering with bypass capacitors at the load terminals may be
required to bypass the high frequency load current.
3.9.5. Inductive Loads
Inductive loads can produce voltage spikes that may be harmful to the Power Supply.
A diode should be connected across the output. The diode voltage and current rating
should be greater than the Power Supply maximum Output voltage and Output
current rating. Connect the cathode of the diode to the positive output and the anode
of the diode to the negative output of the Power Supply.
Where positive load transients such as back EMF from a motor may occur, connect a
surge suppressor across the output to protect the Power Supply. The breakdown
voltage rating of the suppressor must be approximately 10% higher than the
maximum Output voltage of the Power Supply.
Hazardous voltages may exist at the outputs and the load connections when using
a power supply of any rated Output Voltage. To protect personnel against
accidental contact with hazardous voltages, ensure that the load and its
connections have no accessible and live parts. Ensure that the load wiring
insulation rating is greater than or equal to the maximum Output voltage of the
Ensure that the load wiring mounting hardware does not short-circuit the output terminals.
Heavy load cables must have some form of strain relief to prevent loosening of the
3.9.6. Connecting Single Loads, Local Sensing (Default).
Fig.3-3 shows recommended load and sensing connections for a single load. The
local sense lines shown are default connections at the rear panel J2 sense connector.
Local sensing is suitable for applications where load regulation is less critical.
Power
Supply
WARNING
power supply.
CAUTION
connections or bending of the busbars.
+v
-v
-Rem Sense
-Local Sense
Load Lines, twisted pair,
+Local Sense
shortest length possible.
+Rem Sense
41
83532002 Rev C
+
Load
-