CPFE1000FI SERIES
POWER SUPPLY
OPERATION MANUAL
4
19 August 2020
1. Timing Sequence
Note: IOG is an internal factory measurement test point that is not accessible to the user.
When recovering from any fault or reapplication of AC input, the output recovery may be delayed for up to 20 seconds.
2. Output Voltage Adjustment Range
Output Voltage Adjustment Range:
+/-20% of the typical voltage rating
When increasing or decreasing the output voltage, care must be taken such as not to exceed the maximum output power.
If remote sensing is used, this must also be considered as not to exceed the maximum output power.
2.1
Output Voltage Adjustment by voltage adjustment potentiometer.
A multi-turn potentiometer is located between the (+) and (-) output studs. Turning the adjustment screw on the
potentiometer clockwise increases the output voltage; likewise, turning the screw counter clockwise decreases the output
voltage. Note: Care must be taken as not to adjust the output voltage higher than the highest voltage specified within the
specified voltage range; doing so may cause the over voltage protection (OVP) circuit to activate thus immediately
reducing the output voltage to zero.
2.2 Output Voltage Adjustment by applying external voltage
By applying an external voltage at the TRIM terminal, the output voltage can be adjusted within the same output voltage
adjustment range of +- 20% of the nominal output voltage.
Exceeding the maximum specified output voltage will cause
activation of the Over Voltage Protection (OVP) circuit.
Likewise, exceeding the minimum output voltage will cause activation of the Low Voltage Protection (LVP) circuit. The
nominal output voltage is present without using the external output voltage adjustment circuit.