SMC Networks LECSN-T Series User Manual

3. SIGNALS AND WIRING
3 - 27
3.8.2 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 3.5. Refer to this section and make connection with the external device.
(1) 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. Refer to section 3.8.3 for source input.
Approximately
6.2 kΩ
Approximately
5 mA
V
CES
1.0 V
I
CEO
100 µA
TR
24 V DC ± 10%
300 mA
Sw itch
For transistor
EM2,
etc.
Servo amplifier
DICOM
(Note)
Note.
It will be approximately 4.3 kΩ for interface of CN3-1 and CN3-10 pins.
(2) 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 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 driver.
The following shows a connection diagram for sink output. Refer to section 3.8.3 for source output.
(Note) 24 V DC ± 10%
300 mA
If polarity of diode is
reversed, servo amplifier
will malfunction.
Servo amplifier
ALM,
etc.
Load
DOCOM
Note.
If the voltage drop (maximum of 2.6 V) interferes with the relay operation, apply high
voltage (maximum of 26.4 V) from external source.
driver
driver
driver

SMC Networks LECSN-T Series Specifications

General

Brand	SMC Networks
Model	LECSN-T Series
Category	Controller
Language	English