Technical Manual for EA350 Analog Pulse Type Servo Driver V101 3.4.5 Wiring of digital output terminal Take DO1 for example. DO1~DO4 have the same interface circuits. 1) When the higher-level device has relay input Fig. 3-11(a) Correct wiring of the DO terminal when the higher-level device has relay input Fig. 3-11(b) Incorrect wiring of the DO terminal when the higher-level device has relay input Caution ☞ When the higher-level device has a relay input, do connect a freewheel diode; otherwise damage may be caused to the DO terminal 2) When the higher-level device has optical coupling input Fig.
3-12(a) Correct wiring of the DO terminal when the higher-level device has optical coupling input Fig. 3-12(b) Incorrect wiring of the DO terminal when the higher-level device has optical coupling input The maximum allowable voltage and current capacity of the optical coupling output circuit inside the servo driver: ➢ Voltage: DC30V (maximum) ➢ Current: DC50mA (maximum) ➢ If it drives an induced load (such as a relay or contactor), it is required to additionally install a surge voltage absorption circuit, such as:
RC absorption circuit (note that the leak current shall be smaller than the holding current of the control contactor or the relay), voltage-dependent resistor, or freewheel diode (for use in a DC electromagnetic circuit; special attention shall be paid to the polarity upon installation). The components of the absorption circuit should be installed close to both ends of the relay or contactor coil. Caution ☞ 3.4.6 Wiring of CN4 analog input terminal AI1 and AI2 are generally used for input of speed or torque analog signals. Fig.3-13 AI1/AI2 Terminal Wiring Diagram 35 Signal name Pin number Function Analog quantity AI1 15 Voltage analog input Voltage input range:
-10V to +10V, 12 bits in resolution Maximum allowable voltage: ±12V Input impedance: 10K AI2 30 GND 29 Analog input ground