Yes, PCR-LE series can be externally controlled by installing the optional analog interface board.
The functions of the external analog control are as follows.

Amplifying the input waveform:
The optional EX05-PCR-LE (analog interface board) is required.
It allows for amplification of the input waveform, enabling it to be used as a power amplifier.
Additionally, an external signal can be added to the signal source of PCR-LE series.

Varying the voltage of the output AC waveform using DC signals:
The optional EX06-PCR-LE (analog interface board) is required.
When the AC mode or AC+DC mode is selected, an AC voltage of 0 to 150 V (when the L range is selected) or 0 to 300 V (when the H range is selected) is output in relation to an external DC signal (0 to 10 V) input.

Controlling the output through the external contact:
The external contact allows for the following external control by connecting between the pins assigned to each signal in the signal I/O connector:
Turn on/off output
Execute and stop sequences
Clear alarms
Shut down the output

Monitoring the operation status:
The signal I/O connector can be used to externally monitor the following operation status of PCR-LE series:
Output (OUTPUT ON STATUS)
Alarm occurrence (ALARM STATUS)
Current peak limit and overload (OOR STATUS)
Busy (BUSY STATUS)

For the details, read the user’s manual – chapter of Controlling the Output Using External Analog Signals.