Moeller XIOC, Hardware And Engineering

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Signal modules
04/03 AWB2725-1452GB
12
Wiring up the digital output module (24 V DC)
Wiring up the relay output module
RC peak-suppression filter
X
When an inductive load is present, wire an RC peak-suppression
filter (capacitor 0.1
m F and resistor about 100 O ) parallel to the
load. For DC loads, freewheel diodes must be used.
Fuse
X
There is no fuse inside the module. Fit a 6 A fuse in the circuit
(common) to protect the external wiring from being burnt out.
Supply voltage for relay operation
X
Observe the polarity of the 24 V DC connection. Incorrect wiring
can damage the internal circuitry.
The operating life of a contact is inversely proportional to the
square of the current. Any overload currents that occur, or directly
connected capacitive loads, can therefore drastically reduce the
operating life of a relay.
The transistor output module is to be preferred for high-frequency
switching operations.
Wiring up the transistor output module
Freewheel diode
X
When using inductive loads,connect a freewheel diode in
parallel.
S and C terminals
Always connect up the S and C terminals. If the module is operated
without these terminals being connected, then the freewheel
diodes cannot carry out their function, and there is a danger that
the module will not function correctly, or may even be damaged.
Fuse
A fuse is wired into the common current path, to prevent the
external wiring from being burnt out, but it cannot protect the
transistors. The transistors can, therefore, be destroyed by a short-
circuit of the external load.
If the fuse has blown, then no output signals can be produced,
even though the LED is lit up.
Figure 11: External wiring of the relay output XIOC-12DO-R
a Fuse
b RC peak-suppression filter or diode
Figure 12: Operating life diagram for the relay contacts
+
0
1
2
3
4
5
C
–
6
7
8
9
10
11
C
h
24 V H
a
b
24 V H
100/240 V
h
1000
500
100
10
1
0,1 0,5 1 2
240 V AC, L load
Switching current [A]
Switching operations (
x
10
000)
240 V AC, R load
24 V DC, R load
24 V DC, L load
Figure 13: External wiring of the transistor output XIOC-8DO/-16DO
(positive logic, source type)
a Fuse
b Diode
i
Caution!
When the blown fuse has been replaced, do not switch on
the power to the module again, until you have found and
removed the cause of the fault.
0
1
2
3
4
5
6
7
C
8
9
10
11
12
13
14
15
S
a
b
12/24 V H
+
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