6
Section 4: Theory of Operation
The CoolX platforms are comprised of an appropriate CoolPac and a selection of CoolMod DC
output modules selected to deliver the exact volts and amps requirements of the system
designer. An operational block diagram is shown above.
The CoolPac is made up of an off-line single-phase AC front end, EMI filter, and customer
interface and associated housekeeping circuits. Input AC mains voltage (L, N and GND) is
applied to either an IEC type input connector or a screw terminal input block (optional) and
then through an EMI filter designed to meet EN55022 Class B. Some applications may require
an external ferrite on cabling to meet Class B Radiated EMI. Please contact Applications
Support for recommendations.
For medical applications, the EMI filter also ensures the power supply meets the low earth
leakage current requirements of EN60601-1 3rd Edition. All modules provide medical isolation
of 4000VAC (2 MOPP) from input to output and extended isolation of 1850VAC from output
to earth (Note: 1 MOPP requirement is 1500VAC). A 24W auxiliary
‘always
-
on’
isolated bias
supply of 12VDC or 5VDC (optional) is provided for peripheral use. This Bias supply also has
medical isolation of 4000VAC (2 MOPP). A full suite of monitoring and controls including AC
Fail, Global Inhibit/Enable, and Over-Temperature Alarm are provided.
CoolMods provide isolated DC outputs. These can be set to the required voltage setpoints by
the user or factory set as required. Each CoolMod has its own discrete Enable/Inhibit control,
Voltage Adjust (Vtrim), Current limit adjust (Itrim), and Remote Sense.
Summary of Contents for CoolX1800
Page 29: ...29 ...
Page 71: ...71 CoolX1800 2 x Bulk Modules ...
