Intrinsically safe power unit

The LEDGYSZM power unit supplies the explosion-proof LSzR-150-RB LED light source with intrinsically safe power from outside the hazardous area, and monitors its operation in line with railway safety requirements.

• generates a safe, energy-limited, intrinsically safe output voltage from a normal power supply
• monitors the operation of the light source supplied from the output, based on its current consumption
• potential-free output contacts and status LEDs indicate the operation of the light source
• the correct operation of the monitoring circuit can be tested while the light source is in continuous operation, controlled from dedicated connection points
• designed for mounting in electrical control cabinets
• holds an EC type-examination certificate

Advantages

• Easy installation
• Low maintenance

Technical data

• Supply voltage: 22…28 V DC
• Maximum current consumption: 900 mA
• Matched output power: 4.5 W (9 V, 500 mA)
• Maximum short-circuit current: 860 mA
• Maximum open-circuit output voltage: 19.5 V DC
• Relay outputs: 4 short-circuit monitoring contacts and 4 open-circuit monitoring contacts, each with normally open, common and normally closed terminals
• Relay output rating: 50 V, 2 A DC or 2 A AC
• Connectable wire cross-section: 0.5…2.5 mm²
• Protection marking: II (2)G [Ex ia] IIB
• Degree of protection (MSZ EN 60529:2001): IP00
• Operating temperature: −20 °C…+40 °C
• Protection against electric shock: SELV (IEC 60364-4-41)
• Earthing point: yes, must be connected!
• Wire cross-section at the earthing screw: min. 2.5 mm²
• Dimensions: 196 × 75 × 73 mm (length × width × height)
• Test option for the open-circuit monitoring circuit: yes – an external potential-free contact can be connected to the dedicated connection points
• Electrical parameters of the test points: U₀ < 28 V, Iₖ < 15.5 mA

References

MOL Plc.: Százhalombatta, Füzesgyarmat, Pécs