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5.5 The EXT I/O Connector
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NOTE
5.5.4 Electrical Characteristics of the Output Signals
External DC
power supply
voltage
Output signals
(internal pull-up resistors 4.7 k
Ω
)
High level
Low level (Output current)
10 mA
30 mA
5 V
5V
0.9 V
1.1 V
12 V
12 V
0.9 V
1.1 V
24 V
24 V
0.9 V
1.1 V
The internal DC power supply of 5 VDC is provided between INT DCV
and INT GND. The maximum current capacity is 100 mA. Do not
connect any external circuit whose current consumption is greater than
100 mA.
INT GND is grounded to the chassis of the 3532-50 unit.
When using the EXT I/O connector, be sure always to supply power to the
external DC power supply.
The output signal low level output current is a maximum of 30 mA. If a
current greater than this is required, you should connect a transistor
circuit using a current amplifier driven by an external power source or the
like externally.
The output signals are the collector outputs of the photocouplers, and are
connected to the external DC power supply (EXT. DCV) via 4.7 k
Ω
pull-up
resistors provided internally to the 3532-50 unit.
The relationship between the external DC power supply voltage, the voltage
of the output signals, and the current, is as shown in the following table:
The above value is for reference only, and not a guaranteed value.
Direct connection of a circuit whose input voltage V
IL
is regulated to a
maximum of 0.8 V or the like is not possible.
In such a case, keep V
IL
below 0.8 V by incorporating a transistor or a drive
capable buffer circuit or the like.
