MultiCam Boards Documentation > PICOLO series Documentation > PICOLO Alert Handbook > Image Processing > I/O Operation > Professional Inputs

Professional Inputs

Characteristics

The board professional inputs are contact-closure inputs

Equivalent Schematics

A current is sent in the input connected load. This 130 μA current is reversed every 4 ms. The input lines are sampled internally in order to measure the impedance of the input connected load and the input voltage.

ProfessionalIEqSch

Professional input equivalent schematic

Based on these two measurement, the professional input state is defined according to the following tables.

Contact-Closure Connection

If the professional input is connected to a contact-closure device, such as a switch or a relay, its state is defined as open or low depending on the impedance measurement of the input connected load.

Professional input state

Measured impedance

< 4 kΩ

> 4 kΩ

Measured voltage

Any

LOW
(WENTLOW)

OPEN

5 V or TTL Connection

If the professional input is connected to a 5 V logical or a TTL device, its state is defined as high or low depending on the input voltage measurement. If the impedance of the input connected load is high, the input state is defined as open, denoting a wire disconnection.

Professional input state

Measured impedance

< 4 kΩ

> 4 kΩ

Measured voltage

< 1.5 V

LOW
(WENTLOW)

OPEN

> 1.5 V

HIGH
(WENTHIGH)

12 V or 24 V Connection

If the professional input is connected to a 12 V or 24 V logical device, its state is defined as high or low depending on the input voltage measurement. If the impedance of the input connected load is high, the input state is defined as open, denoting a wire disconnection.

Professional input state

Measured impedance

< 4 kΩ

> 4 kΩ

Measured voltage

< 6 V

LOW
(WENTLOW)

OPEN

> 6 V

HIGH
(WENTHIGH)

Use and Wiring

Switch Connection

A professional input can be connected straight to a switch or a push-button.

ProfessionalISysIntSwitchConnection

MultiCam Parameters

The 2 pins of the input are equivalent and can be swapped.

Relay Output

A professional input can be connected straight to a relay output.

ProfessionalISysIntRelayConnection

MultiCam Parameters

The 2 pins of the input are equivalent and can be swapped.

Opto-Coupled Output

A professional input can be connected straight to a opto-coupled output.

ProfessionalISysIntOptoCouplerConnection

MultiCam Parameters

The 2 pins of the input are equivalent and can be swapped.

5 V or TTL Output

A professional input can be connected straight to a 5 V logical or TTL device.

ProfessionalISysIntTTLConnection

MultiCam Parameters

The 2 pins of the input are equivalent and can be swapped.

12 V or 24 V Output

A professional input can be connected straight to a 12 V or 24 V logical device.

ProfessionalISysInt12VConnection

MultiCam Parameters

The 2 pins of the input are equivalent and can be swapped.