DMI
22
11/04 MN01219002Z-EN
Connecting inputs
The inputs of the DMI are switched electronically and are
isolated from each other and from other electronic circuitry
by means of optocouplers.
Figure 4: Connecting the inputs on the DMI
Connect the input terminals (I0+/I0– to I5+/I5–) to auxiliary
contacts or other relevant contacts from the vicinity of the
circuit-breaker.
Two-wire proximity switches cant be used due to their high
residual current.
The inputs are polarised, i.e. on I0+ the pole must be
connected to the positive potential, and I0– must be
connected with the corresponding reference point.
The current and voltage ranges for the digital inputs are
stated in
a
section “Digital inputs (24 V DC)”, Page 71.
0 V
F1
+ 24 V
24 V
+24 V 0 V 0 V
I
0+
I
0-
I
5+
I
5-
...
h
Polarity reversal will not damage the DMI, but will prevent
the relevant switching states from being indicated and
evaluated.
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