3 Specifications
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AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
Note When you do not use the STO function via safety input signals, short-circuit pins 22 and 23, 24 and 26, 3
and 5, and 6 and 7.
When you use the STO function via safety input signals, remove the attached short-circuit wires and do not
connect anything to pins 7 and 22.
*1. When you use an output signal to drive a relay directly, always insert a diode as shown in the above figure.
Use a high-speed diode.
Safety I/O Signal Table
Pin No. Symbol Name Function and interface
3 and 23 SF1+ Safety input 1 Inputs 1 and 2 for operating the STO function, which are two inde-
pendent circuits. This input turns OFF the power transistor drive
signals in the Servo Drive to cut off the current output to the motor.
4 and 24 SF1-
5 and 25 SF2+ Safety input 2
6 and 26 SF2-
1 EDM+ P EDM Output A monitor signal is output to detect a safety function failure.
2EDM+
21 EDM-
Safety Input Circuits
EDM Output Circuit
4.3 kΩ
430 Ω
24 VDC±5%
4.3 kΩ
430 Ω
SF1+ 3, 23
SF1- 4, 24
SF2+ 5, 25
SF2- 6, 26
Photocoupler input
External power
supply
Photocoupler input
Servo Drive
Signal level
ON level: 20.8 V or more
OFF level: 5 V or less
X
21 EDM-
2 EDM+
1 EDM+P
Di
2.2 Ω
Servo Drive
External power supply
12 to 24 VDC
Maximum service voltage: 30 VDC
Maximum output current: 50 mA
Leakage current: 1 mA or less
Residual voltage:
Di: Surge voltage prevention diode
*1
Short-circuit
protection element
2.0 V or less (EDM+P)
1.7 V or less (EDM+)
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