Electrical Installation
AGD155 Product Manual Rev.2.2
Page 18
Attention
Each of the power/voltage/current absolute maximal ratings is valid over the overall
operating temperature range, subject to the safe operating area (SOA).
Attention
Operating (or storing) the product contrary to the defined absolute maximal ratings is
not allowed and will damage the product.
3.3.5 Grounding
It is recommended to install the AGD155 on a metal plate
for better power dissipation, reduced EMI,
and grounding connection. Make sure the plate is not painted.
The heatsink of the AGD155 is electrically conductive and serves as the protective earth (PE) ground
of the product. However, it is critical to ensure the PE screws are electrically conducting between the
PE of AGD155 and the PE of main power supply in the system.
Figure 7. System grounding
Ground Domains
The following table shows the ground domains in the AGD155 system:
GND. Reference voltage for digital/analog circuits and signals.
PGND. High voltage ground domain (internal)
General. Usually at DC potential close to GND, but not connected internally.
Ground Domains
Name
Ground Domain
Notes
DC power input
GND (I/O return)
External DC power supply
AC power input
PGND (power ground only) Internal PGND
Isolated digital inputs/outputs
General
Isolated
Differential inputs/outputs (not
isolated)
GND
To controller/PLC
PLC
