PPH-1503 User Manual
58
External Relay Control
Function
Description
When the Relay control feature is turned on, it is
synced to the current limit of the power supply.
The external relay control is divided into two
different types, a limit relay and a trip relay.
The limit relay is used in conjuction with CC
mode. When the constant current setting value is
reached, the internal relay control signal will go
high and the OUT terminal will go low (energizing
the relay). When the current level goes back below
the constant current setting then the internal relay
control signal will go low and the OUT terminal
will go high, disconnecting the relay.
The trip relay is used in conjuction with CC mode.
When the constant current setting value is reached,
the output is turned off and the internal relay
control signal will go high and the OUT terminal
goes low (energizing the relay). When the output
power is turned back on and the current limit has
not been reached, the internal relay control signal
goes from high back to low and the OUT terminal
will go high, disconnecting the relay.
Rear Panel
Control Interface
The rear panel control interface
has five terminals, +5V,
IN(software upgrade), OUT
(outputs the control signals) and
GND (connected to the chasis
ground or earth ground),
respectively.
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