Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 28

MELSEC-Q series modules and base units can be used by connecting the RQ extension base unit in the
MELSEC iQ-R series system. ( Page 113 Connection Method for the Extension Base Unit)
MELSEC-Q series power supply modules, I/O modules, and intelligent function modules can be mounted on
the RQ extension base unit. ( Page 82 RQ extension base unit (for MELSEC-Q series modules))
Using the RQ extension base unit enables the use of the existing MELSEC-Q series system as shown below.
MELSEC-Q series main base unit
OUT
MELSEC-Q series extension base unit
1 SYSTEM CONFIGURATION
26
1.1 Overall Configuration
MELSEC-Q series system
5V
SG
POWER CPU I/O0 I/O1 I/O2 I/O3
FG
MELSEC iQ-R series main base unit
I/O4
MELSEC-Q series extension base unit
MELSEC iQ-R series system
RQ extension base unit