(b) Base adapter
Main base unit
Extension base unit
(with power supply)
Extension base unit
(without power supply)
*1: The conversion adapter with fixing frame cannot be used with the base adapter that does not have "N" after the conventional model.
*2: The width is 36 mm larger, so mounting space must be secured. (No need to additionally drill mounting holes)
*3: The width is 22 mm larger, so mounting space must be secured. (No need to additionally drill mounting holes)
*4: Mountable within existing space (No need to additionally drill mounting holes)
• External wiring work is eliminated by directly mounting the existing AnS/QnAS (Small Type) I/O module
When using the conversion adapter, the terminal block cover (enclosed with conversion adapter) must be
• When replacing the AnS/QnAS Series I/O module with connector type external connection method (wiring),
the existing wiring can be used. (The connector, with wires attached, can be connected to the Q Series
module.) Note that after replacement, the Q Series does not have a D-sub 37-pin connector type I/O
module, so the wiring must be changed to a 40-pin connector.
Note that units with and without the conversion adapter can be used together on the same base unit.
• If replacement is difficult from the existing AnS/QnAS (Small Type) I/O module, the module can be replaced
with the FA goods interface terminal module.
(Example: When A1SX20 is replaced, two QX28 modules will be required. This increases the number of
modules and changes the address. By selecting QX40 and providing the FA goods terminal module
"FA-TH16X200A31L" externally, the number of modules does not need to be increased, and the address will
• When replacing a system containing an A Series large type extension base unit connected to the
AnS/QnASCPU to the Q Series, the "Q Series large type base unit, Mitsubishi Electric Engineering Co., Ltd.
Upgrade Tool" can be used to replace the A Series large type extension base unit and mounted modules.
Refer to the following section for tips on selecting the "Q Series large base unit, Mitsubishi Electric
Engineering Co., Ltd. Upgrade Tool" in this case.
Transition from MELSEC-A/QnA (Large Type) Series to Q Series Handbook (Fundamentals) L(NA)08043
MELSEC-A/QnA (Large), AnS/QnAS (Small) Transition Examples L08121 (-B and higher)
Note that the CPU/base unit integrated CPU type cannot be used with the Q Series large extension base
• For details on the upgrade tool manufactured by Mitsubishi Electric Engineering Co., Ltd., please contact
your local Mitsubishi sales office or representative.
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2.2 Replace AnS/QnAS (Small Type) Series with Q Series
Base adapter model*