Power/Digital Ground And Earth Ground - Advantech TPC-B300 Series User Manual

Step A: Connect the cabinet to earth ground.
Step B: Ensure that all cabinet has been grounded together.
Step C: Connect the ground of the power supply to the cabinet.
Step D: Connect the ground pin of TPC system to the cabinet.
Step E: Connect the I/O to the controller if needed.
Step F: Connect the V+ and V- of power supply to TPC system.
While completing step A to F step by step, you can supply power to TPC system now.
Note! Ensure that all wires follow the installation guidelines or damage to the
system may occur.
Note! If you need to install device or Mini PCIe card on the TPC system,
please double check the voltage between V- and earth ground, if the
voltage is not almost equal with each other, we suggest to short V- and
earth ground with wiring.
2.6

Power/Digital Ground and Earth Ground

The purpose is to block all the external interference on the chassis, and prevent any
possibility of bad grounding design to cause electric shock of people. This is so called
level 1 isolation which consumer PC do not implement this kind of design.
1. TPC Chassis and Earth (Power pin3) are short,
2. TPC Chassis and Power / Digital GND are OPEN.
The TPC is an industrial grade product, designed to prevent external interference
and the possibility of electric shock. To complete the isolation design, we need to
consider the following:
1. The Ethernet is isolated, a LAN connection will not impact the isolation design.
2. For general USB devices, to solve EMI and ESD issues, they are designed as a
chassis and digital short. But the TPC prevents damage to USB devices, ESD
and EMI solutions are designed to use the Power GND as a vent path to ensure
Power GND and Chassis GND will not have potential difference abnormalities.
TPC-B300 Series User Manual 16