Precautions For I/O Module Replacement - Mitsubishi Electric MELSEC Q Series Handbook

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REPLACEMENT OF I/O MODULE

3.3 Precautions for I/O Module Replacement

(1) Size of wire and solderless terminal
Since the module and terminal block of the Q series are smaller than those of the A series, the
applicable size of wire and solderless terminal for a terminal block differ between the two series.
Therefore, when replacing the A series with the Q series, use the wire and solderless terminal that meet
the specifications of the Q series I/O modules.
(2) Connectors for external wiring
(a) Connectors for external wiring are not came with Q series 32- and 64-point I/O modules.
Purchase the connector (A6CON) as required.
(b) The pin layout is the same between AnS series and Q series I/O modules (connector
type).
External wiring can be used even after AnS series I/O modules are replaced by Q series I/O
modules.
(Without changing external wiring, existing connectors can be connected to Q series I/O modules.)
Note that, for modules having a 37-pin connector, the connecting direction of the connector is
inverted between the AnS series and Q series.
(3) Precautions for input module
(a) Specifications change of rated input current
Check the specifications of connecting devices (such as sensors and switches) since rated input
current is reduced for some Q series input modules compared to that for the AnS series.
(b) Specifications change of off current
Check the specifications of connecting devices (such as sensors and switches) since off current is
reduced for some Q series input modules compared to that for the AnS series.
(c) Specifications change of the maximum number of simultaneous input points
The maximum number of simultaneous input points is reduced for some Q series input modules
compared to that for the AnS series.
When replacing the AnS series with the Q series, refer to the derating chart and use the points within
the range shown in the chart.
(d) Specifications change of rated voltage value
For the Q series QX4 and QX8 DC input modules, only 24VDC can be applied.
When applying 12VDC, use the QX7.
(e) Specifications change of response time
For Q series DC input modules, the I/O response time can be set with parameters.
Set the I/O response time with parameters while adjusting it to the response time of the AnS series
module.
(f) Specifications change of common terminal arrangement
The common terminal arrangement may differ between the AnS series and Q series. To apply
different voltages for each common, take measures, such as using different modules according to the
applied voltage.
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