
AT680 Leakage Current/IR Meter user’s Manual
30
34 EX-VCC1
35
IN-VCC
Internal
3.3V:
Not Recommend to use
36
IN-VCC
5.2 Electrical Characteristics
Input Signal:
Each input signal is connected to the LED (cathode side) of the photo-coupler. The LED
(anode side) is connected to the pull-up power supply voltage.
Output Signal:
Each output signal is outputted via an open collector by using a photo-coupler. The voltage
of each output is obtained by connecting pull-up resistors, inside or outside of the AT680.
NOTE:
If the external power supply greater than 8VDC, use external pull-up resistance please.
The Pin 32 leaves float.
The output signal current can not drive relay.
Power supply
The power supply for the judgment output signal pull-up and that for the operation output
signal pull-up and input signal drive can be set separately. You can 3.3V of the
internal power supply or from +3.3V to +24V external power supply.
1
2
R
499
EXT.DC
INPUT
Figure 5-2
Typical Circuit Diagram of Handler Interface Input signals.
1
2
4
3
R
4.99k
EXT.DCV
OUTPUT
GND
Figure 5-3
Typical Circuit Diagram of Handler Interface Output signals.