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Appendix C: Signal Connection of MCU DI/DO
Dry Contact:
Each channel can accept 3~18Vdc voltage, and it is able to drive 150mA
current for low level.
The SW2 switch needs to switch to "OFF" state. The GPO signal will not
have a pull up resistor internally when you switch "SW2" to "OFF" state.
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.
Internal
12VO_R
2
1
[41]
DIRECTION
[41]
ODOMETER
SP_TXD_3
SP_RXD_3
[42]
CAN_H
[42]
CAN_L
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_+
DB26_GND
GPO Register
Port
1
OPEN
0
GND
55
External
MH2
MH1
26
25
24
23
22
21
20
19
18
17
External Power
16
15
14
13
12
11
External Resistor
10
9
8
7
6
5
4
3
2
1
VTC 1021 Series User Manual
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