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The PL4+ gas control unit represents the best technology for the detection of flammable, toxic or Oxygen compounds in small systems. The PL4+ has 4 analogue 4-20 mA inputs that can be extended to 8 by using the 4-input expansion board PL4/ESP, easy to plug into the control unit. The panel is housed in an IP65 ABS box with a 12Vdc 1.5 A power supply integrated.
Mode status LEDs for alarms and fault warnings along with the backlit LCD display provide for real-time gas concentration reading. An internal buzzer provides an audible alarm that will activate according to the programmed alarm thresholds. Alarms are user selectable and for each input, it is possible to set the type of detector, its full-scale range and the alarm thresholds.
The panel can be easily programmed via the three-position key-switch for Set, Unset and Program along with the Reset and Acknowledge push buttons. The panel comes complete with 5 output relays: 1 for each threshold (AL1, AL2, AL3), 1 for the fault (FLT) and 1 auxiliary and freely programmable. By using the 4-input expansion board, the panel can benefit from further 16 Open-Collector outputs linked to the second and third alarm thresholds (AL2 œ AL3) of each detector being connected. The PL4+ box can fit a 12 Vdc 7Ah backup battery to ensure the system’s correct working when the main power supply fails.
Mr. Marine trades under Mr. Marine Elevator, Mr. Marine Ballast and Mr. Marine Instruments & Controls. Our dynamic company aims at keeping vessels safe and compliant, anywhere in the world. With technical know-how, unparalleled spare part sourcing and 24/7 responsiveness, we are your global beacon.