User`s manual
Overall system System configuration
MELSEC System Q, Hardware 3 – 17
Base units and accessories
Type Description Note
Main base units
Q32SB For power supply module, CPU and up to 2
modules
Slim type main base unit
It is not possible to connect an exten-
sion base unit.Q33SB For power supply module, CPU and up to 3
modules
Q35SB For power supply module, CPU and up to 5
modules
Q33B-E For power supply module, CPU and up to 3
modules
Connection of extension base units
possible
Q35B-E For power supply module, CPU and up to 5
modules
Q38B-E For power supply module, CPU and up to 8
modules
Q38DB For power supply module, CPU and up to 8
modules
Connection of extension base units
possible
Multiple CPU high speed transmission
base unit
Q38RB-E For 2 redundant power supply modules, CPU and
up to 8 modules
Connection of extension base units
possible
Q312B-E For power supply module, CPU and up to 12
modules
Q312DB For power supply module, CPU and up to 8
modules
Connection of extension base units
possible
Multiple CPU high speed transmission
base unit
Extension base units
Q52B For up to 2 modules Without power supply, connect only
with cable QC05B
Q55B For up to 5 modules
Q63B For up to 3 modules Depending on the CPU type are up to
7 extension base units connectible to
the main base unit with maximum 64
slots totally.
Q65B For up to 5 modules
Q65WRB For 2 redundant power supply modules and up to 5
modules (redundant local I/O of a redundant
system)
Q68B For power supply module and up to 8 modules
Q68RB-E For 2 redundant power supply modules and up to 8
modules
Q612B For power supply module and up to 12 modules
Connection cable
QC05B Cable length: 0.45 m For connecting Q52B and Q55B only
QC06B Cable length: 0.6 m For connecting the base units
QC12B Cable length: 1.2 m
QC30B Cable length: 3 m
QC50B Cable length: 5 m
QC100B Cable length: 10 m
Tracking cable
QC10TR Cable length: 1 m For connecting the 2 CPU modules of a
redundant system.
QC30TR Cable length: 3 m
Tab. 3-5: Base units and accessories