Delta AS218TX-A User Manual

4.8.2.3 Transistor Output Circuit (NPN)
ZD D
[ Figur e 2 ]
C
Y
VDC
+
High powe r-
Fre quentl y ON OF F/
ZD: 9V Zener, 5W
D: 1N4001 diode
①
Direct-current power supply
②
Emergency stop
③
Fuse
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.
1. A diode is connected in parallel to absorb the surge voltage: used in low-power situations (refer to
Figure 1).
2. A diode and Zener are connected in parallel to absorb the surge voltage: used in high-power and
power-on/off frequently situations (refer to Figure 2).
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.
⑥
Mutually exclusive output: For example, Y0.2 controls the clockwise rotation of the motor, and Y0.3
controls the counterclockwise rotation of the motor. This interlock circuit and the program in the PLC
ensure that there are protective measures if an abnormal condition occurs.
⑦
Connected to a NTC thermistor (negative temperature coefficient), when a bulb (incandescent lamp
) is
used as a DC load and a thermistor is connected in series to absorb the surge current.
VDC
+
D
[ Figure 1 ]
C
Y
Low power-
D: 1N4001 diode
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Delta AS218TX-A Specifications

General

Brand	Delta
Model	AS218TX-A
Category	Control Unit
Language	English