Digital Input - Nexcom VTC 7260 User Manual

Appendix E: Signal Connection of DI/DO

Digital Input

CN12 connector for GPI signal (digital signal input). The CN12 connector
has 4 digital input channels by default.
Wet Contact (default)
The SW2 switch needs to switch to "ON" state. The GPI signals have a pull
up resistor to Vin Voltage internally.
The figure below shows how to connect an external source to one of the
input channels.
Internal
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External
External GPI
Port
Switch Register
ON (Short) GND 0
OFF (Open) OPEN 1
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Dry Contact:
The SW2 switch needs to switch to "Low" state. The GPI signal will not have
a pull up resistor internally.
The figure below shows how to connect an external source to one of the
input channels.
Internal External
External GPI
Port
Switch Register
ON (Short) GND 0
OFF (Open) HIGH 1
VTC 7260 Series User Manual