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Sistemas de alarma por rebalse Zona Ex 0 y WHG LS 500, LS 300

The level controller LS 500 can be used with level sensors LS 300 EU, LS 300 FU or LS 300 ESPU (refer to page 62). Approved without a list of materials for inflammable liquids (Zone 0) and non-inflammable, water polluting liquids (WHG/VAwS).
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SISTEMA DE ALARMA POR REBALSE ZONA EX 0 Y WHG LS 500, LS 300

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APLICACION MODELO TECNOLOGIA MARCA
Nivel LS 500, LS 300 - Afriso
FUNCION (Sistema) CODIGO SECCION
Sistemas de alarma por rebalse Zona Ex 0 y WHG. 02-5003 02

Overfill alarm system Ex (Zone 0) and WHG.

Application

Level Controller LS 500 The level controller LS 500 can be used with level sensors LS 300 EU, LS 300 FU or LS 300 ESPU. Approved without a list of materials for inflammable liquids (Zone 0) and non-inflammable, water polluting liquids (WHG/VAwS).

Technical Approval of the German Institute for Building Technology: Z-65.11-228 EC design type approval: TÜV 00 ATEX 1641 Ex II (1)G [EEx ia] IIC The level controller supplies the level sensor via an intrinsically safe circuit, evaluates the change in resistance of the PTC thermistor, continuously checks the PTC thermistor operation and monitors the system (power failure, short-circuit, cable breaks, etc.). The output signal of the level controller is a voltage-free relay contact. Negative test results cause the overfill alarm system to respond. A scanner integrated in the level controller monitors the PTC thermistor. The warming up and cooling down characteristics of the PTC thermistor are checked several times per second. The unit features extremely high operational safety and a long service life as a result of the monitoring and self-diagnostics functions described.

The overfill alarm system has to be set up to either stop the filling process or to trigger visual and audible alarms (with sufficient volume: 70 db(A) at a distance of 1 m) when the maximum level is reached. The level controller is installed outside of the hazardous area.

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Technical specifications ENT 20 Ex

Supply circuit
Supply voltage: AC 230 V
Power consumption: max. 4 VA (Supply voltage: DC 24 V or AC 24 V at additional cost)

Output current circuit
1 voltage-free changeover contact Sensor current circuit (intrinsically safe)
Voltage: < DC 15.8 V
Current: < 154 mA
Power: < 600 mW

Operating temperature range
-25 °C/+50 °C

Housing
Plug-in housing, protection IP 40 W x H x D: 75 x 150 x 110 mm

LS 500.AK5-19, Fail Safe AC 24 V LS 500.AK5-19, Fail Safe DC 24 V

The LS 500.AK5-19 fail-safe 19“ rack mounting level controller can be used with all type LS 300... level sensors (including already installed ones). This combination meets the requirements of class AK5. Periodic tests of the overfill alarm system are no longer required with LS 500.AK5. Specifications are similar to LS 500, but designed as a 19“ rack mounting unit.

 








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