TDK Genesys User Manual page 40

3.9.2. Noise and Impedance Effects
To minimize the noise pickup or radiation, the load wires and remote sense wires should
be twisted pairs to the shortest possible length. Shielding of sense leads may be
necessary in high noise environments. Where shielding is used, connect the shield to the
chassis via a rear panel Ground screw. Even if noise is not a concern, the load and
remote sense wires should be twisted-pairs to reduce coupling, which might impact the
stability of power supply. The sense leads should be separated from the power leads.
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 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.
3.9.3. 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 current rating.
Connect the cathode to the positive output and the anode 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.
3.9.4. Connecting Single Loads, Local Sensing (Default).
Fig.3-10 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
Fig. 3-3: Single load connection, local sensing
+v
-v
-Rem Sense
-Local Sense
Load Lines, twisted pair,
+Local Sense
shortest length possible.
+Rem Sense
36
83-530-000 Rev J
+
Load
-