Perle Systems STS, SCS manual Digital Output, Overview

Channels

Digital Output

Overview

When the channel is set for digital output, either voltage is applied to the channel or the channel is grounded. Note that the internal jumpers must match the software setting and must be set to Output (by default, they are set to Input); see Digital I/O Module on page 366 to find out how to set the internal jumpers.

Functionality

The Digital output channels support three types of Digital output: sink (voltage), source (ground), and sink and source (apply voltage or ground). For the output type, you can configure the following options:

zYou can choose to manually activate/deactivate the Digital output.

zYou can choose to manually activate/deactivate the Digital output and then specify that the Digital output will either pulse (you get to specify the active and inactive pulse times) continuously or for a specified number of pulse counts.

zYou can choose to manually activate/deactivate the Digital output and then specify a delay before the output goes from inactive to active or active to inactive.

zYou can also specify a failsafe action that can either activate or inactivate the Digital output when the failsafe timer is triggered (see Failsafe Timer Functionality on page 239 for more information).

In an industrial freezer warehouse, the IOLAN D4 is used to monitor the freezer doors. When one of the industrial freezer doors are left open for more than five minutes, the Monitoring Application (using the Perle API) starts the Digital output sink, causing the strobe light on top of the offending freezer to activate.

Network

Monitoring

Application

D4

perle

IOLAN

Output

Input

Digital I/O

Output

Input

Industrial

Freezers

248 IOLAN SDS/SCS/STS User’s Guide, Version 3.6