Philips Inca 311 User Manual download pdf (Page 8)

switched to the on position with a positive input, the flash

unit will flash or lit continuously.

2.3.2.1 Using the Trigger Input

The trigger input is optically isolated.

The following diagram shows and example of how to use

the optical Isolated input.

24V

Inca

2K7

Figure 2-3 Optical isolated trigger input

When the diode is conducting and thus emitting light, the

software will interpret this as a binary ‘1’.

The input is TTL level compatible.

• input current 6.3 mA < Ion < 10 mA

• Pmax 20 mW

2.3.2.2 Using the Flash and Watchdog

Outputs

The flash and watchdog outputs are optically isolated .

The following diagram shows an example of how to use

the optical output.

24V

2K7

Inca

Figure 2-4: Optical isolated flash and watchdog

outputs

When the flash output is defined as active high and the

software sets the flash as active, then the state of the

output is Ioff, and the transistor will not be conducting.

When the flash output is defined as active low, and the

software sets the flash as active, then the state of the

output is Ion, and the transistor will be conducting.

The watchdog will behave the same as the flash output in

the active high definition.

The inputs and outputs are not protected in any way, so

care must be taken when connecting anything to these

inputs and/or outputs.

All inputs and outputs are TTL level compatible.

• output current 0.9 mA < Ion < 18 mA, Vce max 40 volt

• Pmax 20 mW

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Philips Inca 311 User Manual Page 8