Delta AH500 Hardware Operation Manual page 270

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4.13.3.3 Transistor Output Circuit

Direct-current power supply

The output terminals of a transistor module are open-collector output terminals. If Y0.8 is a pulse train

output terminal of a transistor module, the output current passing through its output pull-up resistor must

be greater than 0.1 A to ensure that the transistor module operates normally.

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.

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.

Y0.9 can not be connected to a power supply directly. It must be connected to a load.

C h a p t e r 4 I n s t a l l i n g H a r d wa r e a n d W i r i n g

Transistor output

Emergency stop

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