Numeric Processing Module (Num); Introduction; Functionality - ABB Relion 670 Series Technical Reference Manual

Section 17
IED hardware
17.2.4
17.2.4.1
17.2.4.2
626
IEC05000759 V1 EN
Figure 296: UBM position, rear view.
Pos Description
1 UBM

Numeric processing module (NUM)

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.

Functionality

The NUM, Numeric processing module is a high performance, standard off-the-
shelf compact-PCI CPU module. It is 6U high and occupies one slot. Contact with
the backplane is via two compact PCI connectors and an euro connector.
1MRK 505 208-UEN B
1
en05000759.vsd
Technical reference manual