User’s Manual of ISW-1022M Series and ISW-1033MT
5.8.2 Digital Output
When First/Second Digital Output function is enabled, First Digital Output/Second Digital Output will then be
available respectively.
Condition: The system will send an electrical Low-to-High or High-to-Low signal to First Digital Output
(DO0)/Second Digital Output (DO1) when the condition of ticked checkbox is met.
¾ Port Fail: Having ticked this checkbox, DO0/DO1 will output an electrical Low-to-High or High-to-Low signal
when port failure occurs.
¾ Power Fail: Having ticked this checkbox, DO0/DO1 will output an electrical Low-to-High or High-to-Low signal
when power failure occurs.
Action: Choose the output type of electrical signal.
¾ LowÆHigh: Having focused this radio button, DO0/DO1 will output an electrical signal of Low-to-High when
the condition of the ticked checkbox is met (port/power failure occurs).
¾ HighÆLow: Having focused this radio button, DO0/DO1 will output an electrical signal of Low-to-High when
the condition of the ticked checkbox is met (port/power failure occurs).
Figure 5-73 Digital Output interface
Besides ticking the checkboxes in the Condition column field, the power/port failure
checkboxes of Fault Relay Alarm have to be ticked as the precondition.
Please refer to Fault Relay Alarm section. Also, please notice that the digital output can’t
connect to the external device using power higher than 40V/200mA.
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