ABB Relion 670 series, Technical Reference Manual, Page: 1095 / 1232

19.2.3 Universal backplane module (UBM)
19.2.3.1 Introduction
The Universal Backplane Module (UBM) is part of the IED backplane and is mounted
above the CBM. It connects the Transformer input module (TRM) to the Analog
digital conversion module (ADM) and the Numerical module (NUM).
19.2.3.2 Functionality
The Universal Backplane Module connects the CT and VT analog signals from the
transformer input module to the analog digital converter module. The Numerical
processing module (NUM) is also connected to the UBM. The ethernet contact on the
front panel as well as the internal ethernet contacts are connected to the UBM which
provides the signal path to the NUM board.
19.2.3.3 Design
It connects the Transformer input module (TRM) to the Analog digital conversion
module (ADM) and the Numerical module (NUM).
The UBM exists in 2 versions.
• for IEDs with two TRM and two ADM. It has four 48 pin euro connectors and one
96 pin euro connector, see figure
512
• for IEDs with one TRM and one ADM. It has two 48 pin euro connectors and one
96 pin euro connector, see figure
513 .
The 96 pin euro connector is used to connect the NUM board to the backplane. The 48
pin connectors are used to connect the TRM and ADM.
1MRK505222-UUS C
Section 19
IED hardware
1089
Technical reference manual