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8030HEPTA/GPS GPS - NTP Time Server with 2x 10/100/1000 MBit LAN Interface - V04.00
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hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
8.3.2.4 Network Interface PRP (Activation Key necessary)
The PRP (Parallel Redundancy Protocol) functionality is specified in standard IEC 62439-
3:2011 and enables to bundle the physical network interfaces ETH0 and ETH1 to one logical
network interface. Each network interface is connected to an independent LAN (Local Area
Network). If one of the two LANs has got a failure, usage of PRP ensures that the network
connection between the PRP terminal devices is going to be maintained via the second, inde-
pendent LAN. PRP standard was developed for very high demanding and critical applications
in the field of automation of substations.
The following illustration shows an example of a PRP network:
PRP-suitable applications are known as DAN (Dual Attached Node) and are going to be con-
nected to the independent networks "LAN A" and "LAN B". The advantage of PRP is that cost-
efficient and common network switches can be used which do not have to support the PRP
standard. Applications which do not need to be redundantly available and which do not have
to support PRP can be connected without problems in one of the two LANs - they are then
called SAN (Single Attached Node). If it is necessary to redundantly connect non-PRP-sup-
porting applications to the PRP network, a so-called RedBox (Redundancy Box) can be used.
Time Server 8030HEPTA/GPS supports PRP as DAN and can therefore directly be integrated
into a PRP network without using a RedBox.
