N 3.9.3) – AMETEK ASD Series User Manual
Page 58
Operation
Sorensen ASD Series
3-20
M551177-01 Rev A
Note: The OVP circuit remains active for all units in parallel operation. For
ease of use, adjust the OVP level for the slave to maximum and adjust the
master OVP level to the desired setting.
3.9.3 SERIES OPERATION
Series operation is used to obtain a higher voltage single output supply
using two units. To set up series operation:
Connect the negative terminal (
–) of one supply to the positive terminal (+)
of the next supply of the same model. The total voltage available is the
sum of the maximum voltages of each supply (add voltmeter readings).
Notes:
Under no condition should the negative (
–) output terminal of any
power supply exceed 150V to Earth ground. This is limited by the
creepage/clearance distances internal to the construction. If a
higher output voltage range is required, contact the Sales
Department or Customer Service for availability.
The maximum allowable current for a series string of power
supplies is the rated output current of a single supply in the string.
Remote sensing should not be used during series operation.
A free-wheeling diode (power diode capable of the maximum
current of the series set connected in parallel, but reverse biased)
is recommended to protect against sinking current into a supply
should one supply b
e “ON” while the other is “OFF.” (See Section