ProNet Series AC Servo User's Manual
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3.2.4 Interface Circuit
This section shows examples of servo drive I/O signal connection to the host controller.
■Interface for Analog Reference Input Circuit
Analog signals are either speed or torque reference signals at about 40kΩ impedance, and the maximum allowable
voltages for input signals is ±10V.
Reference speed input Reference torque input
10V
470Ω(1/2W)min.
1
2
3
2KΩ
V-REF
GND
About 40KΩ
0V
Servodrive
■Interface for sequence input circuit
The sequence input circuit interface connects through a relay or open-collector transistor circuit. Select a low-current relay
otherwise a faulty contact will result.
■Interface for line driver output circuit
The amount of two-phase (phase A and phase B) pulse output signals (PAO,/PAO,PBO,/PBO) and zero-point pulse
signals (PCO,/PCO) are output via line-driver output circuits. Normally, the servo drive uses this output circuit in speed
control to comprise the position control system at the host controller. Connect the line-driver output circuit through a line
receiver circuit at the host controller.
■Interface for sequence output circuit
Photocoupler output circuits are used for Servo Alarm (ALM), Servo Ready(S-RDY), and other sequence output signal
circuits. Connect a photocoupler output circuit through a relay circuit.
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