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Digital output, External internal, Switch sw1 to”off state – NEXCOM VTC 7100-D1K User Manual

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Copyright © 2012 NEXCOM International Co., Ltd. All Rights Reserved.

73

Appendix C: Signal Connection of GPO, GPI, Analog Voltage Input and Analog Current Input

VTC 71-D Series User Manual

Wet Contact:
The SW2 need to switch to “OFF” state. The GPI signal will have no pull up
resistor internally when you switch “SW2” to “OFF” state.

In this case, the external input signal will have a voltage of high level by itself.
The maximum voltage of high level can be accepted up to 30Vdc.

The figure below shows how to connect an external output source to one of
isolated input channel.

GP|1

GP|2

GP|3

GP|4

GP|5

GP|6

GP|7

GP|8

1

2

3

4

5

6

7

8

9

10

ISO1_GND

Terminal-10-90-3.81mm

Hight voltage is driven from external device

Low voltage is GND driven from external device

CN2

External

Internal

External

Device

Digital Output

CN3 connector for GPO signal ( digital signal output )
The CN3 has 8 isolated digital output channels. Each channel can accept
0~30Vdc voltage. And it is able to drive 500mA current for low level. The
signal connection of CN3 support two connected methods for output signal
type.

Dry Contact:
The SW1 to need switch to “OFF” state. The GPO signal will no have a pull
up resistor internally when you switch “SW1” to “OFF” state.

The output signal will has two state, one is low level (driven to 0V from GPO
signal ) other is open ( high voltage is provided from external device).

1

2

3

4

5

6

7

8

G_ O _1

G_ O _2

G_ O _3

G_ O _4

G_ O _5

G_ O _6

G_ O _7

G_ O _8

ISO1_VCC5

G_O1U

G_O2U

G_O3U

G_O4U

G_O5U

G_O6U

G_O7U

G_O8U

R124

R125

R126

R127

R131

R132

R133

R134

300E

300E

300E

300E

300E

300E

300E

300E

16

15

14

13

12

11

10

9

0805

0805

0805

0805

0805

0805

0805

0805

DIP SW 2XB

SW1

NO

Switch SW1 to”OFF state”

The figure below shows how to connect an external input source to one of
isolated output channel.

GPO1

GPO2

GPO3

GPO4

GPO5

GPO6

GPO7

GPO8

1

2

3

4

5

6

7

8

9

10

ISO1_GND

Terminal-10-90-3.81mm

CN3

External

Internal

External Device

5

6

7

8

4

3

2

1

M17

ISO1_GND

G_OUT1

G_OUT2

ISO1_GND

Input

Resistor

External power

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