Vacon 100 INDUSTRIAL, Safety Manual

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Thermistor function (ATEX) vacon • 37
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8
8.2 Commissioning
NOTE! Installation, testing and service work on the OPTBJ board can be performed only by quali-
fied persons.
NOTE! It is not allowed to perform any repair work on the OPTBJ board. Return faulty boards to
Vacon for analysis .
NOTE! It is recommended to test the ATEX functionality using thermistor input on OPTBJ board pe-
riodically (typically once a year). For testing, activate the thermistor functionality (e.g. remove Atex-
thermistor plug from the OPTBJ board). The drive enters to fault state and indicates fault 29 (Atex-
thermistor fault, subcode 280).
8.2.1 General wiring instructions
The thermistor connection must be done using a separate control cable. It is not allowed to use
wires belonging the motor supply cables or any other main circuit cables. A shielded control cable
must be used. See also Chapter
3.
8.2.2 Fault diagnosis of thermistor function
The table below shows the normal fault / warning, generated when thermistor input is active
See the fault table in chapter 6.1.
Maximum cable length without
short circuit monitoring
X23 : OFF
Maximum cable length without short
circuit monitoring
X23 : ON
>= 1.5 sq mm 1500 meters 250 meters
Fault code Fault ID Explanation Correcting measures
29 Atex-thermistor 280
Atex-thermistor has detected
overtemperature.