Mitsubishi A2USCPU(S1), User Manual

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6. BASE UNIT AND EXTENSION CABLE
6.1.3 Applicable standards of extension base units (A1S52B(S1), A1S55B(S1), A1S58B(S1), A52B, A55B,
A58B)
When using the A1S52B(S1), A1S55B(S1), A1S58B(S1), A52B, A55B or A58B extension
base unit, make sure that the voltage of the receiving port (the module installed in the last
slot of the extension base unit) is 4.75V or more.
Since the power supply module on the main base unit supplies 5V DC to the A1S52B(S1),
A1S55B(S1), A1S58B(S1), A52B, A55B or A58B extension base unit, a voltage drop
occurs through the base unit and extension cable. If the specified voltage is not supplied at
the receiving port, incorrect input or output may result.
If the voltage at the receiving port is less than 4.75V, replace the extension unit with the
A1S65B(S1), A1S68B(S1), A62B, A65B or A68B model that has a power supply.
(1) Selection condition
Receiving voltage of the module installed in the last slot of the A1S52B(S1),
A1S55B(S1), A1S58B(S1), A52B, A55B or A58B extension base unit shall be 4.75V
or more.
The output voltage of the power supply module is set to 5.1V or more. Thus, a
voltage drop of 0.35V or less allows use of the module.
(2) Elements of voltage drop
There are the following elements of voltage drop, (a) to (c), depending on the
connection method and type of the extension base unit.
(a) Voltage drop in the main base unit
(b) Voltage drop in the extension base unit
(c) Voltage drop in the extension cable
Extension base unit used
Extension cable is connected to the left
side of the main base unit (in series).
Extension cable is connected to the right
side of the main base unit (parallel installation).
A1S52B(S1), A1S55B(S1)
or A1S58B(S1) extension
base unit is used.
The voltage drop in the main base unit
can be ignored.
A52B, A55B or A58B
extension base unit is used.
The voltage drop in the main base unit
and extension base unit can be ignored. The voltage drop in the extension base unit can
be ignored.
A1S3 B
A1S5 B(S1)
(c)
(b)
A1S3 B A1S5 B(S1)
(a) (b) (c)
A1S3 B
A5 B
(c)
A1S3 B A5 B
(a) (c)