Schweitzer Engineering Laboratories SEL-787, Instruction Manual, Page: 379 / 564

C.3
Date Code 20081022 Instruction Manual SEL-787 Relay
SEL Communications Processors
SEL Communications Processor
SEL Communications Processor
SEL offers SEL communications processors, which are powerful tools for
system integration and automation. The SEL-2030 series and the SEL-2020
communications processors are similar, except that the SEL-2030 series has
two slots for network protocol cards. These devices provide a single point of
contact for integration networks with a star topology, as shown in
Figure C.1 .
Figure C.1 SEL Communications Processor Star Integration Network
In the star topology network in Figure C.1 the SEL communications processor
uses the following substation integration functions:
➤
Collection of real-time data from SEL and non-SEL IEDs
➤
Calculation, concentration, and aggregation of real-time IED
data into databases for SCADA, HMI, and other data
consumers
➤
Access to the IEDs for engineering functions including
configuration, report data retrieval, and control through local
serial, remote dial-in, and Ethernet network connections
➤
Distribution of IRIG-B time synchronization signal to IEDs
based on external IRIG-B input, internal clock, or protocol
interface
➤
Simultaneous collection of SCADA data and engineering
connection to SEL IEDs over a single cable
➤
Automated dial-out on alarms
The SEL communications processors have 16 serial ports plus a front port.
This port configuration does not limit the size of a substation integration
project, because you can create a multitiered solution as shown in
Figure C.2 .
In this multitiered system, the lower-tier SEL communications processors
forward data to the upper-tier SEL communications processor that serves as
the central point of access to substation data and substation IEDs.
SEL Communications
Processor
To Engineering
Modem
To SCADA
Local HMI
SEL IED SEL IED SEL IED Non-SEL IED