DT9000
74
20171205-V2
10.8. The limit outputs (training material)
Outputs
The DT9000 has two optically isolated limit outputs that
work independently from each other. The two outputs are
equivalent. The following information and examples relate
to output No.1. All these, however, are applicable for output
No.2 too, without modification.
Limit values assigned to
the output
The limit output has two possible conditions: switched OFF
or switched ON.
To one output two limit values can be defined. The lower
one is called:
.
means a parameter to be assigned to the limit output
No.1 (
L
imit 1).
(
L
ow
L
imit) means that this is the lower one among the
two limit values.
The high limit value is designated as
, where
(
H
igh
L
imit) means that this is the higher one among the
two limit values.
As the names indicate, the value of the high limit must not
be lower than the value of the low limit. Therefore if you
increase the value of the
parameter, and it
happens to be higher than the value of
, then
takes automatically the value of
.
The operating mode of the output defines the way in which
the measured input signal should control the limit output,
depending on the above-described two definiable limit
values. (All this will be clear through the description and
example provided in the following pages).
Summary of Contents for DT9000
Page 1: ...DT9000 Intrinsically Safe Process Indicator Operating Instructions...
Page 65: ...DT9000 20171205 V2 65 10 2 Application example...
Page 85: ...DT9000 20171205 V2 85 10 9 ATEX Certification...
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