AH Motion – Hardware Manual
4-94
④
The output terminals of a transistor module are open-collector output terminals. If Y0.0/Y0.1 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.
DC power supply
ZP
Y0.0
UP
+
D
Relay/Solenoid valve
NPN transistor output (sinking)
D: 1N4001 diode
ZP
Y0.0
UP
+
D
PNP transistor output (sourcing)
D: 1N4001 diode
DC power supply
Relay/Solenoid valve
⑤
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.
NPN transistor output (sinking)
DC power supply
PNP transistor output (sourcing)
DC power supply