Eaton PROFIBUS-DP EZ204-DP User Manual Page 242

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Inside EZ
MN05013003E238
Monitoring of short-circuit/
overload with EZ..-D.-T..
Depending on the type of EZ in use, it is possible to use the
internal inputs I15 and I16, R15, R16 to monitor for short-
circuits or overloads on an output.
EZ512-...-T..:
I16 = Group fault alarm for outputs Q1 to Q4.
EZ721.-..-T..:
I16 = Group fault alarm for outputs Q1 to Q4.
I15 = Group fault alarm for outputs Q5 to Q8.
EZ620-D.-TE:
R16 = Group fault alarm for outputs S1 to S4.
R16 = Group fault alarm for outputs S5 to S8.
Table 33: Status of error outputs
The following examples are for I16 = Q1 to Q4. I15 indicates
in the same way short-circuits and overloads on Q5 to Q8.
Example 1: Output with fault indication
The circuit diagram functions as follows:
If a transistor output reports a fault, M16 is set by I16. The
break contact of M16 switches off output Q1. M16 can be
cleared by resetting the EZ power supply.
Example 2: Output of operating state
The circuit functions as described in Example 1. An additional
feature is that when an overload is detected, the indicator light
at Q4 is actuated. If Q4 has an overload, it would 'pulse'.
State of outputs Status I15 or I16, R15 or R16
No fault found 0 = switched off (make contact)
At least one output has a
fault
1 = switched on (make contact)
I1-m16----ÄQ1
I16-------SM16
I1-m16----ÄQ1
I16-------SM16
M16-------ÄQ4
EZ500_700.book Page 238 Tuesday, May 3, 2005 5:15 PM
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