IS620P User Manual Chapter 3 Wiring of Servo System
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Encoder phase Z output circuit outputs OC signals. Normally, the encoder phase Z output
circuit provides feedback signals to the host controller. The circuit and the host controller
together form a closed-loop position control system. An optocoupler circuit, relay circuit, or bus
receiver circuit shall be used in the host controller to receive feedback signals.
GND
Servo drive
5-24 VDC
Optocoupler
29
PZ-OUT
GND
44
PE
To reduce noise interference, connect the 5V ground of the host controller to the GND terminal
of the servo drive, and use the shielded twisted-pair.
The maximum allowable voltage and current of the optocoupler output circuit inside the servo
drive are as below:
•
Maximum voltage: 30 VDC
•
Maximum current: DC, 50 mA
3.3.5 Wiring of Holding Brake
The holding brake is used when the servo motor controls a vertical shaft. The servo motor with
brake prevents the movable part from shifting due to gravity when the power supply fails.
•
The holding brake built in the servo motor is only used for keeping the stopped state. Do not use it
to stop running of the servo motor.
•
Brake coils are of no polarity.
•
When the servo motor with brake runs, the brake may generate click sound, which does not affect
its functions.
•
When brake coils are energized (the brake is ON), magnetic ux leakage may occur at the shaft
end. Thus, pay special attention when using magnetic sensors around the servo motor.
The following table describes the models of holding brake connectors.
Table 3-17 Models of holding brake connectors for frame 40/60/80 servo motor
2-pin plug, regardless of positive or negative polarity
Plastic housing: AMP 172157-1
Terminal: AMP 770835-1
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