Module
Description
Galvanic RJ45 Ethernet SFPs
Small form factor pluggable for Ethernet
communication
Galvanic RS485 communication module
(RS485)
Module used for DNP3 and IEC 60870-5-103
communication
IRIG-B Time synchronization module (IRIG-B)
Module with 2 inputs. One is used for handling
both pulse-width modulated signals and amplitude
modulated signals and one is used for optical
input type ST for PPS time synchronization.
17.2.2
Numeric module (NUM)
IP14288-1 v2
17.2.2.1
Introduction
M12643-3 v3
The numeric processing module (NUM) is a CPU module that handles all
protection functions and logic.
For communication with high speed modules, for example analog input modules
and high speed serial interfaces, NUM is equipped with a Compact PCI bus. NUM
is a compact PCI system card, that is, it controls bus mastering, clock distribution
and receives interrupts.
NUM provides up to 4 optical (type LC) or galvanic (type RJ45) Ethernet
ports(one basic and three optional).
17.2.2.2
Functionality
M12644-3 v5
The numeric module (NUM) is a high-performance CPU module based on a dual-
core processor. It is 6U high and occupies one slot. Contact with the backplane is
achieved via a compact PCI connector and an euro connector.
The NUM has two PC-MIP expansion slots where mezzanine cards, such as the
LDCM, can be mounted. It also has four SFP cages for Ethernet communication.
Up to four SFP transceivers for optical 100BASE-FX or galvanic RJ45 100BASE-
TX communication can be mounted in the SFP cages.
Only SPF transceivers approved by ABB (1MRK005500) are
compatible with the SFP cages.
Application code and configuration data are stored in flash memory, and non-
volatile RAM is used to store log data.
The NUM is equipped with a real time clock. It uses a capacitor to keep track of
the time when the IED is not energized.
The NUM is passively cooled, which is possible due to its low power dissipation.
Section 17
1MRK 505 384-UEN A
IED hardware
680
Breaker protection REQ650 2.2 IEC
Technical manual
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