13 USING STO FUNCTION
13.4 Detailed explanation of interfaces
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13
13.4
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 the following section.
Refer to this section and make connection with the external device.
Page 456 STO I/O signal connector (CN8) and pin assignment
Sink I/O interface
Digital input interface DI-1
This is an input circuit in which photocoupler cathode side is input terminal. Transmit signals from sink (open-collector) type
transistor output, relay switch, etc.
Digital output interface DO-1
This is a circuit of collector output terminal of the output transistor. When the output transistor is turned on, collector terminal
current will be applied to the output.
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 5.2 V voltage
drop occurs in the servo amplifier.
■
When outputting two STO states by using each TOFB
*1 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.
■
When outputting two STO states by using one TOFB
*1 If the voltage drop (maximum of 5.2 V) interferes with the relay operation, apply high voltage (maximum of 26.4 V) from external source.
Approx. 3.0 k
˖
STO1
STO2
Servo amplifier
Switch
Approx. 5 mA
For transistor
STOCOM
TR
V
CES
≤ 1.0 V
I
CEO
≤ 100 μA
24 V DC ± 10%
300 mA
TOFCOM
Servo amplifier
TOFB2
If polarity of diode is
reversed, servo amplifier
will malfunction.
Load
TOFB1
Load
24 V DC ± 10%
*1
300 mA
If polarity of diode is
reversed, servo amplifier
will malfunction.
TOFCOM
Servo amplifier
TOFB2
Load
TOFB1
24 V DC ± 10%
*1
300 mA
Summary of Contents for MELSERVO-J4 series
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