Eaton MTL5501-SR Instruction Manual

Also see for MTL5501-SR: Instruction manual

Contents

INM 5500 Rev 10597 FAULT FINDING AND ROUTINE MAINTENANCEWARNINGOn removal, take care that a hazardous-area connector is not laid in aposition in which it may inadvertently come into contact with safe-areacircuit components7 1 Maintenance precautionsMost Codes of Practice for intrinsic safety permit live maintenance on intrinsically safe devicesand systems, provided precautions are taken to preserve the integrity of the device or system.During live maintenance of MTL5500 modules, the hazardous-area connectors that plug intothe tops of the modules are likely to be removed. Avoid leaving a hazardous-area connectorin a position where it may inadvertently contact non-IS circuits that are nearby. Prevent this byproviding some form of temporary mechanical method of securing the connector so that it cannotcome into contact with the non-IS circuits:a) By plugging the connector into an MTL5599 dummy isolatorb) By using a tiewrap to constrain the connector in a safe position.7 2 Fault findingWhen fault finding, carry out the following steps as far as is necessary:–7 2 1Check that all modules with power (PWR) LEDs are ON.With the MTL5575 & MTL5576 models, a flashing LED indicates alarm or fault conditions, referto section 8. Note: The LED may also flash during intermediate stages of configuration.7 2 2Exchange potentially faulty modules for working units as follows:–a) Unplug the hazardous-area connectors, then the safe area connectors.b) Unplug any power connectors and remove from DIN rail.c) Reverse this procedure to fit a replacement module.7 2 3Potentially faulty modules should be tested in workshop conditions, using an appropriate testprocedure for the particular module as described in Section 8.7 3 Routine maintenanceCheck the general condition of the installation occasionally to make sure that no deteriorationhas occurred. Carry out the following at least once every two years and more frequently forparticularly harsh environments:–a) Check that modules are of the types specified in the relevant documentation.b) Check that modules and hazardous-area connectors are correctly and legibly tagged, thatthe connectors are plugged into the matching modules and that the tag details givencomply with the relevant documentation.c) Check that hazardous- and safe-area connectors are securely plugged into their matchingsockets.d) Check that all connections to the connectors are properly made.e) Check that cables to connectors are of the specified type and rating, are correctly routedand segregated (particularly in Eaton enclosures), and are not frayed or otherwise damaged.f) Check that cable screens are properly earthed.Note: It is strongly recommended that only the tests (described in Section 8) and routinemaintenance (described here) should be undertaken by users. If a module is faulty, DO NOTattempt to make repairs or modifications as these may affect the intrinsic safety of the module.All faulty units should be returned to the Eaton’s MTL product line or representative from whichthey were purchased, for repair or replacement.