Settings
Settings
iso685-x-B_D00177_07_M_XXEN/07.2019
32
The exemplary wiring diagram shows how the digital inputs can be wired.
9.2
(1.10.1) Digital 1
Parameters of the digital input.
9.2
(1.10.1.1) 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 signal
•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.
I1 I2
A B
I3
Q1
Q2 M+
+
high
active
low
active
RS-485
Bus
RS-485
Bus
V
A
passive adjustable
X1
active adjustable
Currentmeter
Voltagemeter
TEST
RESET
Deactiv.
Device
+24 V
I
x
X1
X1
+
t
0
1
t(on)
Reaktion
Impuls on
Reaktion
< t(on)
I
x
X1
X1
+
t
0
1
t(on)
Reaktion
Reaktion
Impuls on
< t(on)
9.2
(1.10.1.2) t(on)
The response time t(on) after a switch-on signal can be set between 100 ms and 300 s.
9.2
(1.10.1.3) t(off)
The response time t(off) after a switch-off signal can be set between 100 ms and 300 s.
9.2
(1.10.1.4) Function
The parameters for the function of the digital inputs of the ISOMETER® can be set differ-
ently:
9.2
(1.10.2) Digital 2
Refer to
“Digital 1”, page 32.
9.2
(1.10.3) Digital 3
Refer to
“Digital 1”, page 32.
•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! The device is isolated from the system via
internal system isolating switches.
•Start initial
measurement
In this case, all recorded measured values are discarded and a new
measurement is started
Deactivation of the ISOMETER® with digital inputs
The digital inputs are not interconnected. In order to avoid unintentional
deactivation of the ISOMETER®, it should be ensured during configuration
that different functions are assigned to the inputs.
