Digital Output - Nexcom VTC 7200-BK User Manual

Appendix C: Signal Connection of DI/DO

Digital Output

CN3 connector for GPO signal (digital signal output)
The CN3 connector has 4 digital output channels by default. The signal
connection of CN3 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 SW1 needs to switch to "ON" state. The GPO signal will have a pull up
resistor to 5V internally when you switch "SW1" 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.
Internal
VCC5
GPIO8 16
GPIO7 15
GPO6 14
GPO5 13
GPO4 12
GPIO3 11
GPIO2 10
GPIO1 9
GPO
Port
Register
1 HIGH
0 GND
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External
7
GPIO_GND
CN3
Dry Contact
Each channel can accept 3~18Vdc voltage. And it is able to drive 150mA
current for low level.
The SW1 needs to switch to "OFF" state. The GPO signal will no have a pull
up resistor internally when you switch "SW1" to "OFF" state.
The figure below shows how to connect an external input source to one of
the output channel.
GPIO8
GPIO7
GPO6
GPO5
GPO4
GPIO3
GPIO2
GPIO1
GPO
Port
Register
1 OPEN
0 GND
61
Internal External
16
15 7
14
13
12
11
External power
10
GPIO_GND
9
Resistor
CN3
VTC 7200-BK Series User Manual