Yaskawa MP940 Reference Manual - Manual (Page 185)

MotionSuite™ MP940 Machine Controller Reference Manual Servo Amplifier I/O Signal
5-43
Interface Circuit
An example of connecting the servo amplifier I/O signals to an upper-level
device is shown below.
Interface with Command Input Circuit
Analog Input Circuit
The analog signal is either the speed reference or torque reference signal. The
input impedance is as follows:
• Speed Reference Input: approximately 14k
• Torque Reference Input: approximately 14k
• The maximum allowable voltage of the input signal is ±12V.
Interface with Sequence Input Circuit
Connect this with a relay or open collector transisitor circuit. Select a relay
for use in minimal current. Use of a relay unsuited for minimal current may
result in poor connection.
1.8k Ω(1/2W) or higher
25HP-10B
2k Ω
3
1
2
1000: 1
0V
SG
Approx.
14k
Ω
Servo Amplifier
V-REF or
T-REF
12V
50mA or higher
3.3k Ω
+24VIN
/S-ON etc.
Servo Amplifier
DC24V 3.3k Ω
+24VIN
/S-ON etc.
Servo Ampliifer
50mA or higher
DC24V