Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 33

Redundant configuration of basic systems
A redundant configuration of basic systems that have CPU modules, power supply modules, and network modules on main
base units is available when redundant function modules are used and Process CPUs are operated in the redundant mode.
To build a redundant system, build the same system with modules on two main base units, and connect the redundant
function modules of each system by using tracking cables. Connect the redundant function modules with two tracking cables
to configure a redundant system of tracking cables.
Use modules of the same model, and mount them on the same slots on each main base unit. The redundant function module
can be mounted on any slot of the main base unit. (It does not need to be mounted on the right side of the CPU module.)
In the redundant system, the CPU module in one of two systems performs programs and controls. The other system is in the
standby state and does not perform control. The system that performs control is called a control system and the other system
in the standby state is called a standby station.
Data link is performed between redundant function modules connected with tracking cables. If an error occurs in the control
system, the system is switched to the standby system and the standby system continues the operation.
(1) (2)
For details, refer to "WHEN BUILDING A REDUNDANT SYSTEM" in the following manual.
 MELSEC iQ-R CPU Module User's Manual (Application)
Redundant configuration of power supply modules
A redundant configuration of redundant power supply modules is available when two redundant power supply modules are
mounted on a redundant power supply base unit. (Redundant power supply system)
Even if one power supply module has failed or an error occurs with its power supply system, system operation can be
continued with the other power supply module.
The power supply system error can be cleared or the defective power supply module can be replaced during system
operation. As preventive maintenance, a power supply module can be replaced during system operation. ( Page 145
Replacement procedure of redundant power supply modules)
(1) (1)
(1) (1)
A redundant power supply system can be configured not only with Process CPUs (redundant mode) but also
programmable controller CPUs and remote head modules. For the CPU modules compatible with redundant
power supply base units and redundant power supply modules, check "Compatible CPU" in "Lists of
configuration devices". ( Page 44 Lists of configuration devices)
(1) (2)
(3)
(3)
(1) Process CPU
(2) Redundant function module
(3) Tracking cable
(1) Redundant power supply module
(2) Redundant power supply main base unit
(3) Redundant power supply extension base unit
(2)
(3)
1 SYSTEM CONFIGURATION
1.1 Overall Configuration
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