ARCHITECTURAL DIAGRAMS
SNAP PAC S-Series User’s Guide
10
Ethernet Link Redundancy
The following diagram shows a SNAP PAC S-series controller connected to two separate Ethernet network
links. This configuration addresses the concern that an Ethernet network may fail or need maintenance,
leaving the PC running OptoOPCServer, the PC running PAC Display, the controller, and the I/O units unable to
communicate. In this configuration, if one link goes down, devices can still communicate on the other. Each
PC has two network interface cards (NICs), and the SNAP PAC S-series controller and the I/O units
(SNAP-PAC-R1 and -R2 controllers) have two network interfaces as well.
For an example of controller redundancy, see the following page.
PC with two NICs running PAC
Display Professional
PC with two NICs running
OptoOPCServer
I/O units are all connected by the controller. Each
I/O unit is connected to its own group of sensors
and actuators, but all are connected to the same
two networks.
SNAP PAC S-series
controller controls all
I/O units.
SNAP PAC R-series
controller
Sensors and actuators,
location #2
Sensors and actuators,
location #1
Opto 22 Redundant Network
Ethernet switch,
network #2
Ethernet switch,
network #1
SNAP PAC R-series
controller
Содержание SNAP PAC S Series
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