TDK-Lambda CUS350M Installationsanleitung Seite 17

Examples of connecting remote ON/OFF control application:.
Actual Test Waveform （ l imit resistor is 0ohm ） :
4-9. Remote Sensing (S+, S- terminal)
This function compensates voltage drop of wiring from output terminals to load terminals. Connect "S+" terminal to "+"terminal of load and
"S-" to "–" terminal of load with sensing wires. The total line voltage drop (+ side line and – side line) shall be less than 0.5V. Otherwise the
output voltage will decrease as the line voltage drop increased. In case that sensing lines are too long, it is necessary to put an electrolytic
capacitor in following places.
1) Across the load terminal;
2) Between "S+" terminal and "V+" terminal;
3) Between "S- " terminal and "V-" terminal.
4-10. Output Ripple and Noise
Ripple and noise are measured at 100MHz by using a 150mm twisted pair terminated with a 0.1uF & 100uF capacitor. When load cables are
longer, ripple will becomes larger. In this case, electrolytic capacitor, film capacitor, etc. might be necessary to use across the load terminal.
The output ripple cannot be measured accurately if the probe ground lead of oscilloscope is too long. For start up at low ambient temperature,
output ripple noise might not meet specification. However, output ripple noise specification can be met after few seconds.
V+
Power
Supply
V -
All manuals and user guides at all-guides.com
S+
CN52
S-
+
V+
+
V-
150mm
A
C1
C2 Load
Coaxial Cable
1.5m 50ohm
Vo
V
R
Vin
+
Load
_
C1 : 0.1uF Film Cap.
C2 : 100uF Electric Cap.
C3 : 4700pF Ceramic Cap.
R1 : 50ohm
Oscilloscope
Bandwidth : 20MHz
R1
C3
- 4 -
TDK-Lambda
CUS350M
Instruction Manual