Digital Input - Nexcom VTC 7252 Series User Manual

Appendix D: Signal Connection of DI/DO

Digital Input

The GPIO connector (DIO, connector number: 3) for GPI signal (digital signal
input). The GPIO has 3 digital input channels by default.
Wet Contact (default)
The "GPI Active" needs to set to "Low" in Software Demo Utility as shown
below or SDK. The GPI signals have a pull up resistor to Vin Voltage internally.
Note: Example of GPI 1 and GPI 2 as a pair, and GPI 3 as a single.
The figure below shows how to connect an external output source to one
of the input channels.
Internal Sourcing (Default)
Internal
VCC
1: GPI1
2: GPI2
3: GPI3
10: GND
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External
10
1 2
3
9
8 4
7 5
12 11
6
Dry Contact:
The "GPI Active" needs to set to "High" in Software Demo Utility as shown
below or SDK. The GPI signal will not have a pull up resistor internally.
Note: Example of GPI 1 and GPI 2 as a pair, and GPI 3 as a single.
The figure below shows how to connect an external source to one of the
input channels.
Internal
1: GPI1
2: GPI2
3: GPI3
10: GND
65
External Sourcing
External
10
1 2
3
9
8 4
7 5
12 11
6
VTC 7252-7C4IP User Manual
VCC