Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 117

Set the extension level in order of connection, starting from the extension base unit connected to the main
base unit.
Set the correct extension level for the extension level setting connector. The incorrect settings as below may
cause the incorrect input or incorrect output. When any extension level is skipped, slots cannot be reserved
because no slots will be allocated to a skipped extension base unit.
• Any extension level is skipped.
• The same extension level is set to two or more extension base units.
• Two or more connector pins for the extension level setting are inserted, or no connector pins are not
inserted.
For details on the extension level setting, refer to the following.
 QCPU User's Manual (Hardware Design, Maintenance and Inspection)
4.
Install the IN side extension connector cover
on the MELSEC-Q series extension base unit
and tighten the screws of the extension
connector cover. (tightening torque: 0.36 to
0.48Nm)
5 INSTALLATION AND WIRING
5.5 Connection Method for the Extension Base Unit
5
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