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Detailed explanation of interfaces
The details of I/O signal interfaces stated in the following section (refer to the I/O signal interface type in the table) are as
follows. Refer to the section and connect them with external devices.
Page 62 Signal (device) explanation
Digital input interface DI-1
This is an input circuit in which the photocoupler cathode side is the input terminal. Transmit signals from a sink (open-
collector) type transistor output, relay switch, etc. The following connection diagram is for sink input.
For transistor
Approx. 5 mA
TR
Switch
24 V DC
300 mA
V
≤ 1.0 V
CES
I
≤ 100 μA
CEO
*1 For interfaces of the CN3-13 pin and CN3-28 pin, approximately 6.2 kΩ.
For interfaces of the CN3-9 pin, CN3-10 pin, CN3-13 pin, CN3-25 pin, CN3-26 pin, and CN3-28 pin of the MR-J5D2-_G_/MR-J5D3-_G_,
approximately 6.2 kΩ.
Page 73 Internal connection diagram
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 flows to 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 drive unit. The following connection diagram is for the sink output.
Drive unit
ALM
etc.
DOCOM
*1 If the voltage drop (a maximum of 2.6 V) interferes with the relay operation, apply high voltage (a maximum of 26.4 V) from an external
source.
Refer to the following for the source output.
Page 80 Source I/O interface
Drive unit
EM2
etc.
*1
Approx. 4.3 kΩ
DICOM
± 10 %
If the polarity of the diode
is reversed, the drive unit
will malfunction.
Load
*1
24 V DC
± 10 %
300 mA
3 SIGNALS AND WIRING
3.6 Interface
3
77
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