28 MPA2C3 User Manual
Configuring the EVL (Ethernet Virtual Group)
What is an EVL?
An Ethernet Virtual Loop (EVL) allows a group of IP network connected MPA2C3
controllers to be managed as a group, through an embedded Web Server residing
on one of the controllers.
Up to 16 controllers may be grouped into an Ethernet Virtual Loop.
The grouping is known as a Virtual Loop since the administration paradigm is sim-
ilar to an RS-485 loop.
Figure 2-1 EVL System Diagram
Network Requirements
The controllers must be connected to a common IP sub-network that provides
dynamic address assignment through DHCP.
DIP Switch Settings (EVL Mode)
When a MPA2C3 panel is used in EVL mode, DIP (dual in-line package) SW1 Bit 5-
Bit 9 are NOT used to identify the panel. The panel is identified by its MAC address
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