7
UK
•
It generates 2 output signals according to the configured function:
OUT1
Switching threshold
OUT2
Analogue output 4���20 mA
4.1 Switching threshold
OUT1 changes its switching status when the configured upper and lower thresh-
olds (SP1, rP1) are exceeded�
First set the switch point [SP1] in °C or °F� Then set the lower threshold [rP1]�
When you adjust the upper threshold [SP1] the lower threshold [rP1] will change
accordingly� The span remains the same� If [SP1] is lowered to a value where the
span cannot be maintained (as [rP1] would then fall below its minimum value), the
[rP1] is kept with its minimum value� If [SP1] subsequently increases again, [rP1]
also immediately increases�
4.2 Output signal
The following switching functions can be selected:
•
Normally open contact: [
EF
] → [
ou1
]=
Hno
(normally open)
•
Normally closed contact: [
EF
] → [
ou1
]=
Hnc
(normally closed)
4.3 Upper threshold delay
Once the sensor has detected a temperature which exceeds the switching
threshold [SP1] the time delay [dS1] starts running� When this delay period has
elapsed, the output OUT1 activates switching� This status is sustained until the
lower threshold [rP1] is violated� If this occurs before the time delay has elapsed,
the delay will reset� This function can be used, for example, to suppress spurious
impulse signals at the output�
•
Upper threshold delay: [
EF
] → [
dS1
] = x s
4.4 Lower threshold delay
To make sure the output impulse is correctly identified, e�g� by a downstream
control system, the output impulse can be lengthened�
•
Lower threshold delay: [
EF
] → [
dr1
] = x s
