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Appendix C: Signal Connection of DI/DO
VTC 6210-R Series User Manual
Dry Contact
Each channel can accept 3~19Vdc voltage. And it is able to drive 150mA
current for low level.
The SW2 needs to switch to “OFF” state. The GPO signal will no have a pull
up resistor internally when you switch “SW2” to “OFF” state.
The figure below shows how to connect an external input source to one of
the output channel.
Digital Output
CN15 connector for GPO signal (digital signal output)
The CN15 connector has 4 digital output channels. The signal connection of
CN15 support two connected methods for output signal type.
The output signal has two states, one is low level (driven to 0V from GPO
signal) other is open (high voltage is provided from external device).
Wet Contact (default)
The SW2 needs to switch to “ON” state. The GPO signal will have a pull up
resistor to 5V internally when you switch “SW2” to “ON” state. The output
signal has two states, one is low level (driven to 0V from GPO signal ) other
is high level (driven to 5V from GPO signal).
The figure below shows how to connect an external input source to one of
the output channel.
GPO
Register
Port
1
HIGH
0
GND
GPO
Register
Port
1
OPEN
0
GND
External
Internal
GPO1
GPI1
GPI2
GPO2
GPI3
GPO4
GPI4
GPO3
GPIO_GND
CN14
9
10
11
12
13
14
15
7
16
VCC5
6
11
5
12
4
13
External
Internal
GPI1
GPO1
GPO2
GPI2
GPO3
GPI4
GPO4
GPI3
GPIO_GND
CN14
9
10
11
12
13
14
15
7
16
Resistor
External power
