Emerson IP221 appendix Control Unit Connections

Page 14

MEP 3B

I.S.

To head amplifier

Screen to be connected

Relays

Protective

Earth

Neutral

Live

MEP 3L

I.S.

Supply

Figure 2.6 - Control Unit Connections

14

Image 14

Contents Installation ContentsSafety Information Introduction Fault Finding Specification and descriptionProtection of permanently installed equipment Explanation of symbolsHi-Sens cylindrical sensors SensorsGap sensors Interface detection Attenuation method Figure Reflection Method FigureNormal acting head amplifiers Solids Density DetectionHead Amplifier Units Sensor State Output Ii Inverse acting head amplifiersType Industrial Case Marine Control UnitsInstallation 2.1 Calibration Head amplifier internalsIii Interface Sensors Attenuation Method Calibration procedure by sensor type Hi-Sens SensorsIi Gap Sensors Iv Interface Sensors Reflection Method Sludge SensorSensor and head amplifier installation Adjacent head amplifier mounting detailsPage Control unit installation Wiring CableRelay Ratings Ii Head Amplifier UnitIii Control unit Control Unit Connections II 1 G EExia IIC EN 50014 & EN Intrinsically safe installationCertificates of Conformity Unit not switching Fault FindingFault indicated Relay contacts not changingSensor specification Head AmplifiersTemperature Range Power consumptionIntrinsic safety HousingRack Mounted Unit Recommended Spare Parts 5.1 Sensor and head amplifierStandard Control Unit Options Intrinsic Safety Mounting Sensor Type Test SwitchAppendix I Part Numbers Sensor ConnectionIntrinsic Safety Mounting Mains Voltage Output Relay RacksAppendix II List of illustrations Section Title Appendix III List of tables Section TitleMaintenance / Inspection Abcdef International Americas