Limit monitor, differential limit monitor, dual limit monitor |
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GW1
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The limit monitor of the series GW1 are for monitoring DC voltages form ±10mV up to 200V. |
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GW2
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The differential limit monitor of the series GW2 are for monitoring DC voltages form ±10mV up to ±10V and for comparing up to three analog voltages. |
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GW3
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The differential limit monitor of the series GW3 are for monitoring DC currents form ±20µA up to ±20mA and for comparing up to three analog curents. |
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GW4
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The double limit monitor of the series GW4 have been developed for the monitoring and controlling of fill levels in vessels, by usage of corresponding sensors. Higher and lower fill levels are separately adjustable via rotary switch in a range of 0 to 99%. |
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GW4-LCD
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The devices of the double limit monitor / level generator of the series GW4 have been developed for monitoring norm signals and are able, by usage of a corresponding sensor, to record fill levels and/or to generate levels in vessels. They also can be used as a temperature limit monitor or temperature controller by using a Pt100/Pt1000 sensor and, for example, a transducer series PT3 (LEG). |
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LU1
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The fan monitoring devices LU1 are used for speed monitoring of fans with ground-switching tachometer signal output. Up to 4 fans can be monitored in parallel. The minimum speed can be set separately for each fan or jointly for all 4 fans via a 20-turn spindle potentiometer, depending on the device version. If the set minimum speed of a fan is not reached, this is indicated via a common fault signal output (relay de-energised / quiescent current principle) and a red LED in the front of the housing indicates the fault for the corresponding channel (depending on the device variant). |
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LU2
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The fan monitoring devices LU2 are used for speed monitoring of fans with ground switching signal output. The minimum speed can be set via a potentiometer. If the set minimum speed of the fan is not reached, this is signalized via a common fault signal output transistor and a green LED in the front of the housing indicates the fault. The function of this signal output can be switched via a dip switch. S1-1 set to off means that the output switches off (0V) when the fan speed falls below the set value, whereas S1-1 set to ON the output is set to on (24V). The devices require an auxiliary power of 24Vdc and can be snapped onto TS35 mounting rail. |
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