Eaton PROFIBUS-DP EZ204-DP User Manual Page 60

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Installation
MN05013003E56
If inductive loads are not suppressed, the following applies:
Several inductive loads should not be switched off
simultaneously to avoid overheating the driver blocks in the
worst possible case. If in the event of an emergency stop the
+24 V DC power supply is to be switched off by means of a
contact, and if this would mean switching off more than one
controlled output with an inductive load, then you must
provide suppressor circuits for these loads (see the following
diagrams).
Figure 31: Inductive load with suppressor circuit
Behavior with short-circuit/overload
Should a short circuit or overload occur on a transistor output,
this output will switch off. The output will switch on up to
maximum temperature after the cooling time has elapsed.
This time depends on the ambient temperature and the
current involved. If the fault condition persists, the output will
keep switching off and on until the fault is corrected or until the
power supply is switched off (
J section “Monitoring of short-
circuit/overload with EZ..-D.-T..”, page 238).
U
emax
< U
z
< 33 V
0 V H
Q..
+ 24 V H
0 V H
Q..
EZ500_700.book Page 56 Tuesday, May 3, 2005 5:15 PM
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