SMC Networks LECSB2-T Series

3. SIGNALS AND WIRING
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3.9.2 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 the 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 3.9.3 for source input.
Approximately
5 mA
TR
24 V DC ± 10%
500 mA
Switch
For transistor
EM2,
etc.
Servo amplifier
DICOM
V
CES
1.0 V
I
CEO
100 µA
Approximately
6.2 k Ω
The following is for when CN1-10 pin and CN1-35 pin are used as digital input interfaces.
Approx. 1.2 k
Ω
Servo amplifier
24 V DC ± 10%
300 mA
OPC
CN1-10, CN1-35
DOCOM
SD
10 m or less
VCES ≤ 1.0 V
ICEO ≤ 100 μA
Approx. 20 mA
Driver
Driver