Overview
Table 1: Basic modules
Module Description
Combined backplane module (CBM) A backplane PCB that carries all internal signals
between modules in an IED. Only the TRM (when
included) is not connected directly to this board.
Universal backplane module (UBM) A backplane PCB that forms part of the IED
backplane with connectors for TRM (when
included), ADM etc.
Power supply module (PSM) Including a regulated DC/DC converter that
supplies auxiliary voltage to all static circuits.
• An internal fail alarm output is available.
Numerical module (NUM) Module for overall application control. All
information is processed or passed through this
module, such as configuration, settings and
communication.
Local Human machine interface (LHMI) The module consists of LED:s, an LCD, a push
button keyboard and an ethernet connector used
to connect a PC to the IED.
Transformer input module (TRM) Transformer module that galvanically separates
the internal circuits from the VT and CT circuits. It
has 12 analog inputs.
Analog digital conversion module (ADM) Slot mounted PCB with A/D conversion.
Table 2: Application specific modules
Module
Description
Binary input module (BIM) Module with 16 optically isolated binary inputs
Binary output module (BOM) Module with 24 single outputs or 12 double-pole
command outputs including supervision function
Binary I/O module (IOM) Module with 8 optically isolated binary inputs, 10
outputs and 2 fast signalling outputs.
Line data communication modules (LDCM),
short range, medium range, long range, X21
Modules used for digital communication to remote
terminal.
Serial SPA/LON/IEC 60870-5-103/DNP3
communication modules (SLM)
Used for SPA/LON/IEC 60870–5–103/DNP3
communication
Optical ethernet module (OEM) PMC board for IEC 61850 based communication.
mA input module (MIM) Analog input module with 6 independent,
galvanically separated channels.
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.
1MRK 502 029-UEN A Section 5
Installing the IED
45
Installation and commissioning manual
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