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User’s Manual
GPIO input
GPIO output
GND
GPIO output
GPIO Input
GND
Peripheral unit
VT-7GA/VT-7GE
3.2.6.2. GPIO Typical Connection
The following figure is a typical connection method of GPIO. In order to
ensure communicate normally, please connect the GPIO interface of VT-
7GA/VT-7GE as shown in the following figure.
GPIO Cable
GPIO Cable
GND
3.2.6.3. GPIO Specification
VT-7GA/VT-7GE GPIO Specification Descriptions
PINs
Wire
Color
Description
Logic
Symbol
Min
TYP. Max
Unit
Note
GPIO1 Red
Digital Input
VIH
3
5
30
V
Positive Trigger
input
VIL
0
0.6
V
GPIO2 While
Digital Input
VIH
3
5
30
V
Positive Trigger
input
VIL
0
0.6
V
GPIO3 Green
Digital
Output
VOH
-
50
V
Open drain
VOL
0
-
1.2
V
GPIO4 Yellow
Digital
Output
VOH
-
50
V
Open drain
VOL
0
-
1.2
V
GND
Black
Ground
Note: Black wire (Ground) should be connected to ground of connecting devices.
The maximum sink current rating of GPIO output is 300mA.
In case of inductive load of motor, relay, and so on, be sure to use a clamp
diode in parallel with external coil. Generation of the counter electromotive
force that exceeds the output rating is prevented by discharging through the
clamp diode. Relay application circuit is shown in the following figure.
