Mitsubishi 900 Series User Manual page 33

(2) Notes on 5V DC supply for the additional base (A68RB) for duplex system at the final stage:
220mA of current to be consumed will be supplied from the additional base for duplex system at the
final stage to the GOT bus interface, if the GOT power supply is off and the power supply for the
power supply module mounted on the additional base for duplex system at the final stage is on.
Therefore, please make sure that the 5V DC consumption (8A) of the power supply module will not
be exceeded by the sum of the value of the current consumption of the input/output module and
special function module that are mounted on the additional base for duplex system at the final
stage and the value of the current consumption (220mA) of the GOT bus interface.
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2.6 Notes on Q4ARCPU Duplex System
Power on the GOT-A900 series and Q4ARCPU duplex system in the following order.
(1) Power on the GOT-A900 series.
(2) 1 to 2 seconds after power-on of the GOT-A900 series, power on the Q4ARCPU
duplex system.
Power supply
of Q4ARCPU
duplex system
Power supply
of GOT-A900 series
It is recommended to switch power on with an external circuit configured.
If power is not switched on in the order as specified in the restriction, the Q4ARCPU
duplex system will not start up in system A but will start up in system B before it starts
control.
A61RP
Main base
A61RP
Extension base
Bus connection cable
GOT
ON
Power supply
of Q4ARCPU
duplex system
OFF
ON
Power supply
of GOT-A900 series
OFF
1 to 2s