Perle Systems Sds4 Uživatelský manuál stáhnout pdf (Strana 275)

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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 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:

z You can choose to manually activate/deactivate the Digital output.

z You 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.

z You 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.

z You 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 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.

IOLAN

perle

Monitoring

Application

Network

Industrial

Freezers

Digital I/O

Input

Output

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