It depends on the open voltage of the DC power supply.
If the open voltage is 12VDC or less, hot swapping should be safe for the devices. However, some DC sources have higher open voltages above 12V (e.g. 36V, 48V). In that case, hot swapping can damage the sensors or exceed their voltage tolerance.
*With a 12VDC or lower open voltage supply, hot swapping is okay.
*If the power supply has an open voltage higher than 12VDC, do not attempt to hot-swap devices while energized.
*Check the exact open voltage of your DC source before attempting hot plug replacement.
The key factor is the uncontrolled open voltage when not loaded – this can spike beyond device limits if higher than 12V. To be safe, fully de-energize the circuit before swapping low-voltage Keilton devices.