Overview; Figure 1-1 System Configuration - Hitachi LQZ700 User Manual

1 SPECIFICATIONS

1.1 Overview

The SYS SW module (model: LQZ700) is a system changeover module to implement a multi-LPU
(simplified duplex) configuration by connecting between two R70 units or S10V units by this
module.
A standby duplex system for each unit is configured, and the running system is changed over to the
standby system when a fault occurs in the running system.
This changeover is performed by the following causes.
The PCs OK signal of the LPU has changed from the "ON" status into the "OFF" status.
The PI/O output "PI/O OK" of the LPU has changed from the "ON" status into the "OFF" status.
This module (LQZ700) is not available for the CPU unit of the S10mini series.
The following figure shows a system configuration.
R70 unit of system A
PS
RI/O line
SYS
LPU Option
SW
module
PI/O unit
PS ST

Figure 1-1 System Configuration

R70 unit of system B
PS LPU
PI/O
1-2
SYS
Option
SW
module