ABB Relion 670 series, Technical Reference Manual

Page: 1097 / 1232

1
en05000759.vsd
IEC05000759 V1 EN
Figure 514: UBM position, rear view.
Pos Description
1
UBM
19.2.4 Numeric processing module (NUM)
19.2.4.1 Introduction
The Numeric processing module (NUM), is a CPU-module that handles all protection
functions and logic.
For communication with high speed modules, e.g. analog input modules and high
speed serial interfaces, the NUM is equipped with a Compact PCI bus. The NUM is the
compact PCI system card i.e. it controls bus mastering, clock distribution and receives
interrupts.
1MRK505222-UUS C
Section 19
IED hardware
1091
Technical reference manual