84870211

84870211 Datasheet

ENRM filling or emptying with adjustable time delay ENRM Part number 84870211

Part	Datasheet
84870211	84870211 (pdf)

Related Parts	Information
84870214	84870214

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22/10/2012 ENRM filling or emptying with adjustable time delay ENRM Part number 84870211 Regulation of 1 or 2 levels - minimum - maximum Monitoring filling UP or emptying DOWN selected by a switch on the front panel. Probes supplied with AC current. Sensitivity adjustable on front panel from 250 Ω to 1 M Time delay preventing wave effect adjustable from to 5s. Part numbers Type 84 870 211 ENRM 84 870 212 ENRM 84 870 213 ENRM 84 870 214 ENRM Characteristics Monitoring filling UP Monitoring emptying DOWN Monitoring filling UP Monitoring emptying DOWN Monitoring filling UP Monitoring emptying DOWN Monitoring filling UP Monitoring emptying DOWN Specifications Operating range Maximum power consumption Adjustable sensitivity Measurement accuracy at maximum sensitivity Electrode voltage max Electrode current maximum cable capacity Response time high level Response time low level Output relay according to AC1 resistive load Galvanic isolation via transformer 4 kV, 8 mm creepage distance Isolation of contacts and electrodes from power supply Operating temperature range °C Storage temperature range °C Weight g 3 VA 250 MΩ ± 30 % 24 V AC 50/60 Hz 1 mA 50/60 Hz 10 nF 300 ms 500 ms 1 AgNi changeover relay 8 A AC max. Class II VDE 0551 kV AC -20 °C -40 °C 150 Principles Voltages 24 V AC 48 V AC 120 V AC 230 V AC Operating principle General principle The ENRM monitors the levels of conductive liquids. The principle is based on measuring the apparent resistance of the liquid between two submerged probes. When this value is lower than the preset threshold displayed on the unit's front panel, the relay changes state. To prevent any occurrences of electrolysis, an AC current is passed through the probes. A rotary switch on the front panel can be used to select the desired function and sensitivity range. A level can be monitored using the 2nd rotary switch. In this instance, the max. probe remains above the liquid and an adjustable time delay prevents the wave effect. A green LED indicates that the supply voltage is present. A yellow LED indicates the output relay's state. When the green and yellow LEDs are flashing, this indicates an incompatible adjustment position. Principles Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected 22/10/2012 Monitoring a level, filling function, activation time level 1 - on delay, function Up LS Low Sensitivity 250 Ω to 5 kΩ , Up St Standard Sensitivity 5 kΩ to 100 kΩ , Up HS High Sensitivity 50 kΩ to 1 MΩ . When the level of liquid drops below the probe for a period exceeding the value of time delay T set on the front panel, the relay energises and remains on until the level of liquid reaches the probe again. If the level of liquid returns above the level set before the time delay elapses, the relay does not come on. Note When the power returns after a power break, the output relay only energises after time delay T if the level of liquid is below the threshold. Legend Level Relay Principles Monitoring a level, emptying function, activation time level 1 - on delay, function Dwn LS Low Sensitivity 250 Ω to 5 kΩ , Dwn St Standard Sensitivity 5 kΩ to 100 kΩ , Dwn HS High Sensitivity 50 kΩ to 1 MΩ . When the level of liquid rises above the probe for a period exceeding the value of time delay T set on the front panel, the relay energises and remains on until the level of liquid drops back below the probe. If the level of liquid drops back below the level set before the time delay elapses the relay does not come on. Note When the power returns after a power break, the output relay only energises after delay time T if the level of liquid is above the threshold. Legend Level Relay Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected 22/10/2012 Principles Monitoring a level, filling function, deactivation time level 1 - off delay, function Up LS Low Sensitivity 250 Ω to 5 kΩ or Up St Standard Sensitivity 5 kΩ to 100 kΩ or Up HS High Sensitivity 50 kΩ to 1 MΩ . When the liquid level drops below the probe the relay energises immediately and remains on until the level of liquid reaches the probe again and remains above it for a period exceeding time delay T set on the front panel. If the level of liquid drops back below the level set before the time delay elapses, the relay remains on. Note When the power returns after a power break, the output relay energises immediately if the liquid level is below the threshold. Legend Level Relay Principles Monitoring a level, emptying function, deactivation time level 1 - off delay, function Dwn LS Low Sensitivity 250 Ω to 5 kΩ or Dwn St Standard Sensitivity 5 kΩ to 100 kΩ or Dwn HS High Sensitivity 50 kΩ to 1 MΩ .

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22/10/2012

ENRM filling or emptying with adjustable time delay ENRM Part number 84870211

Regulation of 1 or 2 levels - minimum - maximum

Monitoring filling UP or emptying DOWN selected by a switch on the front panel. Probes supplied with AC current. Sensitivity adjustable on front panel from 250 Ω to 1 M Time delay preventing wave effect adjustable from to 5s.

Part numbers

Type 84 870 211 ENRM 84 870 212 ENRM 84 870 213 ENRM 84 870 214 ENRM

Characteristics Monitoring filling UP Monitoring emptying DOWN Monitoring filling UP Monitoring emptying DOWN Monitoring filling UP Monitoring emptying DOWN Monitoring filling UP Monitoring emptying DOWN

Specifications

Operating range Maximum power consumption Adjustable sensitivity Measurement accuracy at maximum sensitivity Electrode voltage max Electrode current maximum cable capacity Response time high level Response time low level Output relay according to AC1 resistive load Galvanic isolation via transformer 4 kV, 8 mm creepage distance Isolation of contacts and electrodes from power supply Operating temperature range °C Storage temperature range °C Weight g
3 VA 250 MΩ ± 30 % 24 V AC 50/60 Hz 1 mA 50/60 Hz 10 nF 300 ms 500 ms 1 AgNi changeover relay 8 A AC max.

Class II VDE 0551
kV AC -20 °C -40 °C 150

Principles

Voltages 24 V AC 48 V AC 120 V AC 230 V AC

Operating principle General principle The ENRM monitors the levels of conductive liquids. The principle is based on measuring the apparent resistance of the liquid between two submerged probes. When this value is lower than the preset threshold displayed on the unit's front panel, the relay changes state. To prevent any occurrences of electrolysis, an AC current is passed through the probes. A rotary switch on the front panel can be used to select the desired function and sensitivity range. A level can be monitored using the 2nd rotary switch. In this instance, the max. probe remains above the liquid and an adjustable time delay prevents the wave effect. A green LED indicates that the supply voltage is present. A yellow LED indicates the output relay's state. When the green and yellow LEDs are flashing, this indicates an incompatible adjustment position. Principles

Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
22/10/2012

Monitoring a level, filling function, activation time level 1 - on delay, function Up LS Low Sensitivity 250 Ω to 5 kΩ , Up St Standard Sensitivity 5 kΩ to 100 kΩ , Up HS High Sensitivity 50 kΩ to 1 MΩ .

When the level of liquid drops below the probe for a period exceeding the value of time delay T set on the front panel, the relay energises and remains on until the level of liquid reaches the probe again. If the level of liquid returns above the level set before the time delay elapses, the relay does not come on.

Note When the power returns after a power break, the output relay only energises after time delay T if the level of liquid is below the threshold.

Legend

Level

Relay

Principles

Monitoring a level, emptying function, activation time level 1 - on delay, function Dwn LS Low Sensitivity 250 Ω to 5 kΩ , Dwn St Standard Sensitivity 5 kΩ to 100 kΩ , Dwn HS High Sensitivity 50 kΩ to 1 MΩ .

When the level of liquid rises above the probe for a period exceeding the value of time delay T set on the front panel, the relay energises and remains on until the level of liquid drops back below the probe. If the level of liquid drops back below the level set before the time delay elapses the relay does not come on.

Note When the power returns after a power break, the output relay only energises after delay time T if the level of liquid is above the threshold.

Legend

Level

Relay

Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected
22/10/2012

Principles

Monitoring a level, filling function, deactivation time level 1 - off delay, function Up LS Low Sensitivity 250 Ω to 5 kΩ or Up St Standard Sensitivity 5 kΩ to 100 kΩ or Up HS High Sensitivity 50 kΩ to 1 MΩ .

When the liquid level drops below the probe the relay energises immediately and remains on until the level of liquid reaches the probe again and remains above it for a period exceeding time delay T set on the front panel. If the level of liquid drops back below the level set before the time delay elapses, the relay remains on.

Note When the power returns after a power break, the output relay energises immediately if the liquid level is below the threshold.

Legend

Level

Relay

Principles

Monitoring a level, emptying function, deactivation time level 1 - off delay, function Dwn LS Low Sensitivity 250 Ω to 5 kΩ or Dwn St Standard Sensitivity 5 kΩ to 100 kΩ or Dwn HS High Sensitivity 50 kΩ to 1 MΩ .

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Datasheet ID: 84870211 507087