Hardware manual

MVS-8100L Hardware Description 2

34 Cognex MVS-8100L Hardware Manual

Schematics for I/O Circuits

This section shows schematic circuit diagrams for the I/O circuits used in the

MVS-8100L.

Trigger Input

Trigger input is used to initiate the acquisition of an image from the currently selected

camera port. A pair of connections (TRIG+ and TRIG–) provide an optically isolated

trigger input. To activate the interrupt, between 4 and 13 volts must be applied to the

terminals. The trigger’s polarity state is programmable via software. The schematic of

the external trigger input circuit is shown in Figure 20.

Figure 20. Trigger input schematic

Status Output

Status output is available for use by your application, as a software controllable parallel

output line. The signal connections are optically isolated. You can use the status output

in one of two ways:

• Attach the STSOP and STSOR pins to an optically isolated device.

• Attach STSOP to PWR and STSOR to GND, and use STSO as a TTL output (the

current-limiting resistors on PWR and GND protect the MVS-8100L and the host

computer).

TRIG+

VCC

470

1N4148

330 Ω

½ W

TRIG–

ILD223