Settings
Settings
isoNAV685-D-B_D00264_03_M_XXEN/06.2017
30
10.1
(1.7) Inputs
The ISOMETER® provides a total of three digital inputs.
The exemplary wiring diagram shows how the digital inputs can be wired:
10.1
(1.7.1) Digital 1
The following parameters can be set for the digital input:
10.1
(1.7.1.1) Mode
The operating mode for the digital input can be set to the following values:
•Active high
An event is carried out on the rising edge of the
digital input (low to high).
Response time t(on)/t(off ) after a switch-on sig-
nal.
I2
I3
A
B
M+
Q2
Q1
+
Device
inactive
Reset
Test
I1
+
I
x
X1
X1
t
0
1
t(on)
Reaction
Impulse on
Reaction
< t(on)
Impulse off
10.1
(1.7.1.2) t(on)
The response time t(on) after a switch-on signal can be set between 100 milliseconds and
300 seconds (refer to
).
10.1
(1.7.1.3) t(off)
The response time t(off) after a switch-off signal can be set between 100 milliseconds and
300 seconds (refer to
).
10.1
(1.7.1.4) Function
The parameters for the function of the digital inputs of the ISOMETER® can be set
differently:
•Active low
An event is carried out on the falling edge of the digital input (high
to low).
Response time t(on)/t(off ) after a switch-off signal.
•off
Digital input without function
•TEST
Device self test
•RESET
Reset of fault and alarm messages
•Deactivate
device
The device DOES NOT measure the insulation resistance, the mes-
sage
Device inactive
appears on the display.
The IT system is NOT being monitored!
+
I
x
X1
X1
t
0
1
t(on)
Reaction
Reaction
< t(on)
Impulse on
Impulse off
