Digital Output - Nexcom VTC 7120-BK Series User Manual

Appendix C: Signal Connection of DI/DO

Digital Output

CN18 connector for GPO signal (digital signal output)
The CN18 has 4 digital output channels. Each channel can accept 0~30Vdc
voltage. And it is able to drive 250mA current for low level. The signal
connection of CN18 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).
SW4 SW4
G_OUT1 1
G_OUT2 2
3
G_OUT3
G_OUT4 4
DIP SW 2X4 DIP SW 2X4
GPO (SW4)
On Pull up VCC5
O Don't Care
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VCC5
8 Z12003 0603 0603 330E 330E
7 Z12004 0603 0603 330E 330E
6
Z12005 0603 0603 330E 330E
5 Z12006 0603 0603 330E 330E
Wet Contact (default)
The SW4 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 isolated output channel.
1 8
2 7
GPO0
3 6
4 5
GPO1
EMB17A03G EMB17A03G
1 8
2 7
GPO2
3 6
4 5
GPO3
EMB17A03G EMB17A03G
62
VCC5
G_OUT1 0603 0603 330E 330E
G_OUT2 0603 0603 330E 330E
G_OUT3 0603 0603 330E 330E
G_OUT4 0603 0603 330E 330E
G_OUT1
G_OUT2
G_OUT3
G_OUT4
VTC 7120-BK Series User Manual