User`s manual

Part names and settings Base units
MELSEC System Q, Hardware 8 – 7
Extension base units Q63B, Q65B, Q68B Q68RB and Q612B
QH00050C
Fig. 8-4: Part names of extension base units
No. Name Application

Extension cable
connector (IN)
Connector for connecting an extension cable (IN) (for signal communications
with the main base unit or other extension base unit)
 Extension cable
connector (OUT)
Connector for connecting an extension cable (OUT) (for signal communica-
tions with another extension base unit).
 Base cover of cable
connectors
Protective cover of extension cable connector.
 Stage No. setting
connector
Connector for setting the number of bases of the extension base unit.
7 extension stages can be set.
 Module connector Connectors for installing the power supply module (two redundant power
supply modules for the Q38RB), I/O modules, and intelligent function mod-
ules.
To the connectors located in the spare space where these modules are not
installed, attach the supplied connector cover or the blank cover module
(QG60) to prevent entry of dirt.
 Module fixing screw hole Screw hole for fixing the module to the base unit. Screw size: M3x12
 Base mounting hole Hole for mounting this base unit onto the panel such as a control panel (for
M4 screw)
 DIN rail adapter
mounting hole
Hole for mounting DIN rail adapter.
Tab. 8-6: Description for part names of extension base units







