LiAM User’s Manual
LiAM Description
35
A correct operation of the magnet cooling keeps the interlock input pins shorted
while a fault has to be generated when the input becomes open (a power source is
needed with a pull-up resistor); the interlock #2 activation level needs to be set to
HIGH with the following command:
MWG:49:2
\r
In order to make this settings take effect (permanently since they are stored in
non-volatile memory), a ‘MUP\r” command needs to be sent to the power supply.
3.1.3
Analog Current Monitor
Each LiAM power supply has an output monitor signal that is fed to the rear
panel BNC
(
Bayonet Neill–Concelman) connector, as shown in
Figure 22
.
Figure 22:
analog current monitor coaxial connector
This signal is a scaled version of the actual output current of the module and is
directly obtained from buffering the current sensing circuit.
This output monitor, rated at ±10V, can be very useful in order to check and
debug the power supply current behavior directly with an oscilloscope.
The gain and bandwidth characteristics of this buffered voltage output are the
following:
Please note that this signal, being the connector directly mounted on the power
supply chassis, is ground-referred and the maximum current that can be sunk/sourced
in order to maintain full output swing is rated at ±5mA – i.e. 2-kΩ load resistor.
