-5-
TDK-Lambda
RDS Series (110VDC Input)
Instruction Manual
6.
Function & Precautions
6-1. Input Voltage Range
The range is 60 to 160V DC. Applying input voltage over than 160VDC will cause damage to power supply.
This product is partially needed output derating for high input (143 to 160V), please refer the section 7-2.
6-2. Output Voltage Range
Output voltage is adjusted to the center of rated value when shipping. And output voltage can be adjusted by the VR of ‘V.ADJ’ rotation.
Output voltage increases when rotating CW direction for the VR. Please use within rated output range as shown below.
5V Output Model : -10% / +20%, 12V, 15V and 24V Output Model : -10% / +10%
Please note that output will shutdown due to OVP activation when output voltage is adjusted too high..
And please use within rated output power when output voltage setting is higher than typical value of rated voltage.
6-3. Input Surge (Inrush) Current
RDS has input surge (inrush) current suppressor inside. The value in the data sheet is specified at 25
o
C ambient temperature.
Inrush current increases during input recycling once the power supply has commenced operation.
Take caution when selecting external input switch or input fuse.
6-4. Over Voltage Protection (OVP)
OVP method is “Output Shutdown (Latch) / Manual Reset”. OVP operates 120-150% of rated output voltage and shuts down output.
After OVP operation, please turn off the input once and wait about 1 minute, then turn on input again or reset ON/OFF control terminal
to reset OVP Latch inside. The OVP setting level is fixed and cannot be adjusted externally.
Be careful when applying external voltage directly to output higher than nominal
as this might lead to damage of the RDS unit. When using inductive load,
such as a motor or a relay, connect diode to output line as right side.
6-5. Over Current Protection (OCP)
5V output Model - - - - - - - - - - - - - - - Constant Current Limit with LVP Shut-down
OCP operates if output current exceeds the rated output current of the unit, approximately at 120% typ.
Then, if output decrease to 2V approximately, the output will be shut down by LVP inside.
After LVP operation, please turn off the input once and wait about 1 minute, then turn on input again
or reset ON/OFF control terminal to reset OVP Latch inside.
12, 15, 24V Output Model - - - - - - - - - Constant Current Limit with automatically reset.
OCP operates if output current exceeds the rated output current of the unit, approximately at 120% typ.
The outputs will be automatically recovered when the overload condition is canceled.
Please note that never operate the unit under over current or shorted conditions for more than 30seconds, as this might to lead
damage or failure. The OCP setting level is fixed and cannot be adjusted externally.
6-6.
Over Temperature Protection (OTP)
The output will be shut down when over rise temperature for ambient or internal of the RDS unit is detected. For this product,
Temperature Detector is built in at Internal Power Module (RDS50-110) inside, then output shuts down when the temperature of
the fin reaches approximately 100
o
C. This automatically resets after temperature less than 80
o
C approximately.
6-7. Remote Sensing Function (+S, -S Terminals)
This product has a remote sensing terminal to compensate a voltage drop between the output terminal of RDS and the load.
When using as local sensing (Not using remote sensing), please short +S/+V and –S/-V terminal by using a short piece sheet metal.
The short pieces are attached when shipping. The compensation line drop voltage is within adjust level and within maximum output power.
Voltage drop level between –V and –S must be less than 2V. Please use shield or twisted pair wire to decrease influence of switching noise.
6-8.
Remote ON/OFF Control Function (CNT, TOG Terminals)
Remote ON/OFF function is available inside. It provides output ON/OFF control with input voltage applied condition as the table below.
Between CNT / TOG terminal
Output Condition
Open or Apply 1.5 to 5V
OFF
Short or apply 0 to 0.4V
ON
