Delta AH500 Hardware Operation Manual page 231

A H 5 0 0 H a r d w a r e a n d O p e r a t i o n M a n u a l
A relay or a solenoid valve is used as a DC load. A diode is connected in parallel to absorb the surge
voltage which occurs when the load is OFF.
⑤
An electromagnetic contactor is used as an AC load. A resistor and a capacitor are connected in
parallel to absorb the surge voltage which occurs when the load is OFF.
⑥
A bulb (incandescent lamp) is used as a DC load. A thermistor is connected in series to absorb the
surge current which occurs when the load is ON.
⑦
A bulb (neon lamp) is used as an AC load. A thermistor is connected in series to absorb the surge
current which occurs when the load is ON.
Mutually exclusive output: For example, Y0.4 controls the clockwise rotation of the motor, and Y0.5
○ 8
controls the counterclockwise rotation of the motor. The interlock circuit which is formed, and the
program in the PLC ensure that there are protective measures if an abnormal condition occurs.
4 - 6 4
V DC power supply
Electromagnetic contactor
V DC power supply