Why a non-connected output on BMXSDO0802 in de-energized state can be measured at 19V ?
The main reason of the 19V measured on a non-connected output from BMXSDO0802 device is that some internal polarization resistance are set (with high impedance) in order the module is able to detect a cut wire on the line. The cut wire detection feature cannot be disabled, only the cut wire detection reporting can be disabled in Control-Expert software tool.
The 19V measured on the digital output with output de-energized is not an issue because the module does not and cannot deliver enough current to activate an actuator. The output is compliant with standard IEC61131-2. Per IEC61131-2, the module shall not deliver a current higher than 0.5mA when output is de-energized. It is the case for BMXSDO0802 module. If the leakage current is below 0.5 mA, the de-energized output is in de-energized state and is not able to activate any actuator input.
The 19V measured on the digital output with output de-energized is not an issue because the module does not and cannot deliver enough current to activate an actuator. The output is compliant with standard IEC61131-2. Per IEC61131-2, the module shall not deliver a current higher than 0.5mA when output is de-energized. It is the case for BMXSDO0802 module. If the leakage current is below 0.5 mA, the de-energized output is in de-energized state and is not able to activate any actuator input.
Gepubliceerd voor: Schneider Electric Belgium
Hulp nodig?
Selecteer zelf het juiste product
Vind snel en eenvoudig de juiste producten en toebehoren voor uw toepassingen.
Offerte aanvragen
Dien uw aanvraag online in en een expert zal contact met u opnemen.
Verkooppunten
Vind eenvoudig de dichtstbijzijnde distributeur van Schneider Electric op uw locatie.
Help Center
Vind de antwoorden die u nodig heeft via bladeren door veelgestelde vragen over onderwerpen.