Eaton MTL5501-SR Instruction Manual

Also see for MTL5501-SR: Instruction manual

Contents

INM 5500 Rev 10206 1 3 MTL5501-SR - Fail-safe Switch/Proximity detector interfaceSingle channel, fail-safe module with line-fault detectionThe MTL5501-SR enables a fail-safe switch/proximity detector located in the hazardous areato control an isolated fail-safe electronic output. It provides line-fault detection (LFD) alarmcontacts and is designed for use with approved fail-safe sensors in loops that require operationup to SIL3 according to the functional safety standard IEC 61508.Note: For reliable, long-term operation the load on the LFD switching relay should be not lessthan 50mW, e.g. 10mA at 5V DC.Hazardous area Safe areaVs–Vs+20 to 35V dc10kΩ1k4Ω+–LFDFailsafeoutput+–Resistors mustalways be fittedfor switch inputs6543217891011121314Terminal Function1 Input –ve2 Input +ve7 Output –ve8 Output +ve10 LFD11 LFD13 Supply –ve14 Supply +veFigure 6 2:Top label forMTL5501-SRInput / output characteristicsInput value insensor circuitsFail–safeoutputOperation LFDcontacts2.9mA < Is < 3.9mA ON Normal CLOSEDIs < 1.9mA & Is > 5.1mA OFF Normal CLOSEDIs < 50μA OFF Broken line OPENRs < 100Ω OFF Shorted line OPENCorrect operation of the fail-safe output and LFD is indicated by the LEDs on the front of theunit. The yellow O/P LED is ON when the fail-safe output is energised. The red LFD LED flashesif a line fault is detected. The fail-safe output is de-energised (OFF) if the module detects anincorrect sensor current, an open circuit or a short circuit in the sensor circuit.Input signal sensors may be either suitable proximity sensors or switches. The proximity sensorproperties are specified in the standard EN60947-5-6:2001; however, when used withMTL5501-SR modules, additional requirements for the “low-impedance” current of 3.4±0.5mA must be met. The list below shows suitable proximity sensors, all manufactured byPepperl+Fuchs Group, Germany, and specified as usable to SIL3, according to IEC 61508:SJ 2-SN NJ 4-12GK-SN NJ 10-30GK-SNSJ 3,5-SN NJ 5-18GK-SN NJ 15-30GK-SNSJ 3,5-S1N NJ 8-18GK-SN NJ 6S1+U1+NNJ 2-11-SN NJ 6-22-SN NJ 15S+U1+NNJ 2-11-SN-G NJ 6-22-SN-G NJ 20S+U1+NNJ 2-12GK-SN NJ 5-30GK-S1N NJ 40-FP-SN-P1