American Magnetics 4Q12125PS-430 Integrated Power Supply System - Manual (Page 20)

2 Rev. 5
Introduction
Features
1.1.4 Flexibility
The Model 4Q12125PS-430 system is configured as a four-quadrant power
supply system which is able to both supply and remove electrical energy
from the superconducting magnet system. The Power Supply System was
engineered to be compatible with most magnet systems.
1.1.5 Standard Remote Interfaces
The Power Supply System provides an RS-232 serial port as well as an
Ethernet port as standard features. All settings can be controlled via the
remote interfaces and the front panel can be remotely locked to prevent
accidental operation. The Power Supply System also provides trigger
functions for data collection and/or logging during operation.
1.1.6 Programmable Safety Features
The Power Supply System is designed to be operated from the front panel
of the Programmer or remotely with operational parameters which must
not be exceeded for the given conditions of the system. Once set, should an
operator inadvertently attempt to take the magnet system to an excessive
magnetic field strength or charge at an excessive voltage, the Programmer
will not accept the parameter and will alert the operator that a value was
rejected because it was outside the user-defined limits.
In addition, each setup parameter can be individually selected for locking.
A user-defined password is required to lock or unlock settings. This allows
an administrator to set and password protect any critical parameters that
should not be changed by the operator. Then the administrator can be
confident that an operator will not subsequently change any of these
critical parameters, and yet will be free to change any non-critical
(unlocked) parameters.
1.1.7 Condition-Based Magnet Auto-Rampdown
The Power Supply System can be connected to an AMI Model 13x Liquid
Helium Level Instrument to allow automatic rampdown of the magnet
(even in persistent mode) should the liquid helium (LHe) level drop to a
preset level. This feature ensures the magnet will be protected and not
experience a quench should the LHe level reach an unsafe level for magnet
operation. A single cable is required to use this feature and is covered in
more detail in section A.5.2 on page 150 of the Appendix. Contact AMI for
more information.
In addition to low LHe level, this input to the Power Supply System can be
used with other instrumentation as well. Other uses for this input include
faults from a cryocooler, temperature instrumentation, etc.