Table 688: Designations for 1/1 x 19” casing with 2 TRM slots
1MRK002801-AC-6-670-1.2-PG V1 EN
Module Rear Positions
PSM X11
BIM, BOM,
SOM, IOM or
MIM
X31 and X32 etc. to X131
and X132
SLM X301:A, B, C, D
LDCM, IRIG-B or
RS485
X302
LDCM or RS485 X303
OEM X311:A, B, C, D
LDCM, RS485 or
GTM
X312, X313, X322, X323
TRM 1 X401
TRM 2 X411
19.2 Hardware modules
19.2.1 Overview
Table 689: 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.
Table continues on next page
1MRK505222-UUS C Section 19
IED hardware
1085
Technical reference manual
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