Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 520

11. MR-D01 EXTENSION I/O UNIT
(2) Detailed explanation of interfaces
This section provides the details of the I/O signal interfaces (refer to the I/O division in the table) given in
section 11.5.3. Refer to the following and make connection with the external device.
(a) Digital input interface DI-1
This is an input circuit whose photocoupler cathode side is input terminal. Transmit signals from sink
(open-collector) type transistor output, relay switch, etc. The following is a connection diagram for
sink input.
(b) Digital output interface DO-1
This is a circuit in which the collector of the output transistor is the output terminal. When the output
transistor is turned on, the current will flow from the collector terminal.
A lamp, relay, or photocoupler can be driven. Install a diode (D) for an inductive load, or install an
inrush current suppressing resistor (R) for a lamp load.
(Rated current: 40 mA or less, maximum current: 50 mA or less, inrush current: 100 mA or less) A
maximum of 2.6 V voltage drop occurs in the servo amplifier.
The following shows a connection diagram for sink output.
For transistor
Approximately
5 mA
Switch
TR
≤ 1.0 V
V 24 V DC ± 10%
CES
≤ 100 µA
800 mA
I
CEO
MR-D01
INP
etc.
DOCOMD
Note. If the voltage drop (maximum of 2.6 V) interferes with the relay operation, apply a
high voltage (maximum of 26.4 V) from an external source.
11 - 57
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MR-D01
SON
etc.
Approx.
5.6 kΩ
DICOMD
If polarity of diode is
reversed, servo amplifier
will malfunction.
Load
(Note) 24 V DC ± 10%
800 mA