Digital Output - Nexcom VTC 1021 Series User Manual

Appendix C: Signal Connection of MCU DI/DO

Digital Output

CN connector for GPO signal (digital signal output).
The CN connector has 3 digital output channels by default. The signal
connection of CN supports two connected methods for output signal type.
The output signal has two states, one is low level (driven to 0V from GPO
signal), and the other is open (high voltage is provided from external device).
Wet Contact (Default):
The SW2 switch 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),
and the other is high level (driven to 5V from GPO signal).
The figure on the right shows how to connect an external input source to
one of the output channels.
Copyright © 2023 NEXCOM International Co., Ltd. All Rights Reserved.
2 1
VCC5
[41] DIRECTION
[41] ODOMETER
SP_TXD_3
SP_RXD_3
[42] CAN_H
[42] CAN_L
1K 1K
SP_TXD_2
SP_RXD_2
RS422_TX-
RS422_TX+
RS485_-
G_O_0
G_O_1
G_O_2
G_I_0
G_I_1
G_I_2
RS485_+
GPO Register Port
1 HIGH
0 GND
54
Internal External
MH2
MH1
12VO_R
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
DB26_GND
VTC 1021 Series User Manual