Phoenix Contact MCR-S-1-5-UI-DCI Mode D'emploi page 22

4.3.6. Configuring the threshold value output
The relay and transistor output of the threshold value versions (MCR-S-...-SW-DCI) are set after the input
measuring range and the analog output have been adjusted.
Setting the switching threshold:
The illustration opposite (Fig. 4) shows the four possibilities of switching behavior of the relay and transis-
tor output. The splitting of the various operational behaviors in threshold value operation is carried out on
the principle of operating current or quiescent current and after threshold value triggering when below the
threshold value point or when it is exceeded.
If necessary, the corresponding switching behaviour can be set via DIP switch 7 and DIP switch 8.
Functional
Switching behavior of relay and transistor output
diagram
Fig. 1 Operating current-controlled when threshold value is exceeded
Fig. 2 Operating current-controlled when lower than threshold value
Fig. 3 Quiescent current-controlled when threshold value is exceeded
Fig. 4 Quiescent current-controlled when below threshold value
1) Operating current-controlled when
threshold value is exceeded
I
IN
( H)
(1)
t
(0)
1
(0)
t
1
(1)
3) Quiescent current-controlled when
threshold value is exceeded
I
IN
( H)
(1)
t
1
(0)
(0)
t
1
(1)
(0) = N/O contact and transistor open / N/C contact closed / LED off
(1) = N/O contact and transistor closed / N/C contact open / LED on
t can be set with software and potentiometer.
1
22
Threshold value
condition
t
Operating voltage
( L)
U
B
t
Relay N/O contact
t and transistor
1
output / LED
t
t
t
Relay/N/C
1
contact
Threshold value
condition
t
Operating voltage
U
( L)
B
t
Relay N/O contact
and transistor
t
1
output / LED
t
t
t
1
Relay/N/C
contact
2) Operating current-controlled when below
threshold value
I
IN
( H)
(1)
(0)
(0)
(1)
4) Quiescent current-controlled when below
threshold value
I
IN
( H)
(1)
(0)
(0)
(1)
DIP 7
OFF
ON
OFF
ON
t
1
t
1
t
1
t
1
DIP 8
OFF
OFF
ON
ON
t
( L)
t
t
t
t
( L)
t
t
t
Fig.4