AC Brushless Servo Drive System Manual Ver: 0002
ACa - 12 / 32
Preliminary
Control Signals.
±10V voltages, Pins 1,2,3 of X1: Internal power supply so the user can easily generate a
velocity command. It offers a maximum current of 20mA limited internally.
Velocity command. Pins 4,5,6 of X1: It allows a range voltage of ±10V and offers an
impedance of 22 kOhms.
Current command. Pins 4,7 of X1: It allows a range voltage of ±6.2V and offers an impedance
of 10 kOhms. The motor torque is directly proportional to the current. "Torque command".
Monitoring, Pins 8, 9, 10 of X1: Voltage outputs for monitoring motor speed and current.
Voltage range of ±10V.
Warning output, Pins 1, 2 of X2: Open-collector output to set a warning when the motor i2t or
the internal Ballast vigilance is activated.
Common, Pin 5 of X2: Reference point for the following Enable signals:
Drive Enable, Pin 4 of X2: At 0Vdc, disables current through the motor which loses its torque.
Speed Enable, Pin 3 of X2: A 0Vdc, forces a "zero speed" command.
These control signals are activated at +24Vdc.
Drive OK. Pines 6, 7 of X2: Relay contact that closes when the internal status of the drive is OK.
It must be included in the electrical maneuver.
Encoder Input + Motor Sensor Temp: Encoder signal input from the motor for velocity
feedback, and Motor thermistor signals.
Encoder Output + Ratio Select: Encoder output for closing the loop at the CNC. They are
splited by the factor selected through the B3-B0 dip-switches.
The maximum section for these cables is 0.5 mm
2
.
INTERNAL FAN ACTIVATION: The internal fan cools the power electronics. The fan turns-on
when the Drive_Enable signal is activated. The fan will turn-off two minutes later than the
Drive_Enable signal had turned-off. This procedure reduces the stress of the fan and makes the
life span longer.
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