High Level Alarm Mute Box with STR551 Indicator/panel meter

Indicator/panel meter/Controller/Re-transmission

STR551 – data sheet

STR551 – manual.




  • Enclosure:
    • IP54 weatherproof rating
    • Polycarbonate
  • Protection:
    • Low voltage control and input circuitry
  • Alarms:
    • Visual (strobe) and audible (buzzer) alarms
  • Control & interface:
    • Electronic Keypad
    • Indicator lights for level alarm
    • Audible and visual alarm mute/reset/test button
  • Inputs:
    • 4/20mA / 0 to 10 V for level sensors
  • Outputs:
    • 4/20mA retransmission
    • 2 relays
    • Serial connectivity relies on RS485 and Modbus-RTU protocol
    • (2 analogue, 1 auxiliary)

Function Features

  • Suitable for applications where the water being discharged from an ablution is required to be pumped away
  • In the event ‘high level’ the visual alarm will activate and sound. This can be muted via mute button


STR551 is an indicator/panel meter for acquisition and retransmission of
processes, also with fast transient. It is provided with relay outputs for alarm
purpose, analogue outputs for retransmission of process/setpoints and
programmable digital inputs.
Distinctive feature is the intuitive multilingual interface, supported by a graphic LCD display 128×64 pixel with backlighting
Visualization options include bar graph and process trend with programmable
sampling time.
Software features include mathematical functions related to process value like
Totalizer and Sum.



TL-STR-24V-MB -Mute Box with STR & DL 2021


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