ABB EBS852 Operating Instructions Manual

Also see for EBS852: Instructions Operating instruction Operating instruction

ABB EBS852 Operating Instructions Manual Manual pdf 5 page image

EBS852 / EBS862 ELECTRONIC UNIT | OI/EBS852/EBS862/EX-EN REV. B 52 Use in potentially explosive atmospheresDANGERExplosion hazard due to improper installation!An explosion hazard is present when installing the electronicunit in potentially explosive atmospheres.The electronic unit must only be installed and operatedoutside of potentially explosive atmospheres.Before the commissioning of the electronic unit, observe thefollowing points:• The electronic unit must not be installed or commissioned inan Ex area.• Check whether the actuator is connected to the rightelectronic unit, see section Electrical data for inputs andoutputs on page 26.• Check whether the associated electronic unit has beenconfigured using the correct actuator parameters. To do this,check the relevant information on the name plate of theactuator and the electronic unit with respect to actuatortype, ambient temperature range of actuator, and NLnumber, if applicable.• On delivery, the positioning time-out function of theelectronic unit associated with the actuator is activated.Deactivating this setting is not permitted.• Rapid traverse mode is not allowed to be used on Exactuators. Therefore, it is not possible to select it via the userinterface.• Activating the breakaway function is not permitted.• Activating the ‘Position dependent switch-off’ function with2 × torque/force is not permitted.• The Contrac electronic unit must be upstream of the motortemperature monitoring unit SD241-B or a similar, certifiedtripping unit.Thermal motor monitoringIn Contrac control actuators for use in potentially explosiveatmospheres, additional independent monitoring of motortemperature is required.Monitoring can be performed using the ABB SD241-B monitoringunit or a comparable certified tripping unit for thermistortemperature sensors.The motor temperature monitoring unit interrupts the powersupply as soon as the motor temperature up-scales thepermissible limit value.Cable harness for the connection of theactuator to the electronic unitInstallation information on the cable harness for actuators inEx designThe electrical connection between the Contrac electronic unitand the Contrac actuator can be established using the cable set(order code 695). The cable harness is not part of the Exprototype test certificate and must therefore be tested forsafety-relevant functionality within the complete installation bythe installer or operator.If the specified cable harness does not meet all safety-relevantrequirements, the proper installation material must be used.For the specified motor connection cable, the shielding must beconnected at both ends and connected with protective ground.Change from two to one column