Allen-Bradley armorstratix 5700, Руководство пользователя, Страница: 212 / 458

212 Rockwell Automation Publication 1783-UM007I-EN-P - December 2017
Chapter 3 Configure Switch Features
Figure 28 illustrates the addition of a Redundancy Box, or RedBox. The
RedBox allows non-PRP devices to be added to both LANs. Devices that are
connected to both LANs through a RedBox are called Virtual Doubly
Attached Nodes, or VDANs.
VDANs do not have media redundancy between the device and the RedBox,
however, media redundancy exists on the LAN A/LAN B side of the RedBox.
In this example, the Stratix 5400 switch is configured as a RedBox.
Figure 28 - Parallel Redundancy Protocol (PRP) Topology with a Stratix 5400 as a RedBox
For more information on PRP topologies and configuration scenarios, see the
EtherNet/IP Parallel Redundancy Protocol Application Technique,
publication
ENET-AT006 .
IMPORTANT You can use only a Stratix 5400 or 5410 switch as a RedBox. However, you
can use any switch as an infrastructure switch in a PRP system.
DC OUTPUT
DIAG
DIAG
DC INPUT
DC INPUT DC OUTPUT
DIAG
DIAG
DC INPUT DC OUTPUT
DIAG
DIAG
DC INPUT DC OUTPUT
DIAG
DIAG
S
D
C
A
R
D
Module
Status
Network
Activity
Network
Status
1734-AENT
Point Bus
Status
System
Power
Field
Power
LAN A
LAN A
LAN A
LAN A
LAN A
LAN B
LAN B
LAN B
LAN B
LAN B
1756-EN2TP, PRP Communication Module, Doubly Attached Node (DAN)
DAN
DAN
DAN
Stratix 5400 configured as a RedBox
SAN
SAN
Drive
VDAN
HMI
VDAN
POINT I/O VDAN
IMPORTANT Products with PRP technology have two ports. Each port connects to a separate PRP LAN that then connects to two independent
sets of network infrastructures.