C h a p t e r 2 : P r e p a r i n g t h e e P r o P S f o r O n l i n e U s e
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Use an Isolated Power Supply
AC to DC power supplies are typically isolated while DC to DC power supplies are often
non-isolated. Check the power supply specifications to ensure that the power supply is
fully isolated. If used in a Class I, Div 2 environment, then the external power supply
must be appropriately rated.
Use Single Point Grounding
The external power supply and the PanelMate ePro PS unit should be grounded to the
same point. Single point grounding should be practiced even when the devices are
located in separate enclosures to help prevent ground loop issues.
Install a Power Supply Solely for the PanelMate ePro PS
If the current external power supply is used for multiple devices, add an external power
supply specifically for the PanelMate ePro PS unit. A separate external power supply will
better protect against system transients and ground potential issues. If used in a Class I,
Div 2 environment, the external power supply must be appropriately rated.
Use a Current-Limiting Power Supply
The external power supply should not be able to source more than five amps. If used in
a Class I, Div 2 environment, the external power supply must be appropriately rated.
Add Circuit Breakers
Install circuit breakers (Cutler-Hammer Catalog Number WMS2C04) on both the supply
and return paths between the PanelMate and the external power supply to protect
against current swells on the return path. The circuit breakers should be rated for ten
amps.