Yaskawa LEGEND Digital Torque Amplifier - Manual (Page 31)

2.2 Input Signals
20
■ Interface Circuit
An example is given below of connection of the digital torque amplifier I/O signals to an
upper level device.
■ Command Input Circuit and Interface
Analog Input Circuit
The analog signal is the torque reference signal. The input impedance is as follows.
• Command Input (CMD-IN): Approx. 14k
Ω
The maximum allowable voltage for the input signal is ± 12V
• 10V= Peak Motor Torque
■ Sequence Input Circuit and Interface
This is connected by a relay or open collector transistor circuit. Select a low current type
when connecting by relay. If low current relay is not used, this may cause a connection
fault.
12V
1.8k Ω (1/2W) or more
25HP-10B
2k Ω
3
1
2
1000 ： 1
0V
SG
Approx. 14k Ω
Amplifier
CMD-IN
50mA or more
3.3k Ω
+24VIN
/S-ON etc.
Amplifier
DC24V
50mA or more
3.3k Ω
+24VIN
/S-ON etc.
Amplifier
DC24V 3.3k Ω
+24VIN
/S-ON etc.
Amplifier
50mA or more
DC 24V