ABB RELION 670 Series Technical Manual page 1288

Section 22
IED hardware
22.2.2.3 Block diagram
Compact
Flash
IEC04000473 V1 EN-US
Figure 645: Numeric processing module block diagram
22.2.3 Power supply module (PSM)
22.2.3.1 Introduction
The power supply module is used to provide the correct internal voltages and full isolation
between the IED and the battery system. An internal fail alarm output is available.
22.2.3.2 Design
There are two types of the power supply module. They are designed for different DC input voltage
ranges see table 1002. The power supply module contains a built-in, self-regulated DC/DC
converter that provides full isolation between the terminal and the external battery system.
1282
Logic
PC-MIP
Memory
North
bridge
CPU
PMC
connector
Ethernet
PCI-PCI-
bridge
en04000473.vsd
1MRK 502 066-UUS B
M12651-3 v1
IP15594-1 v1
M11595-3 v5
IP14278-1 v1
M6377-3 v2
Technical manual