External input/output modules for control units

H520-B – Level Display Module

The H520-B display module is designed to provide an approximate indication of the liquid level. The module does not contain a liquid level sensor; it merely displays the liquid level data received from a connected control system via the RS485 bus.

  • Two numeric LED displays and a clear bar graph for quick assessment of the liquid level
  • RS485 (SLAVE) control input via the ModBus RTU protocol
  • Binary output for activating a relay or siren
  • Display brightness control based on ambient light intensity (nighttime dimming)
  • Quick setup of display parameters using 3 buttons inside the unit
  • Ability to connect up to 4 H520-B display modules to a single RS485 line
  • Module installation in a separate enclosure or on a panel
  • Wide supply voltage range from 8 to 28 V DC, low current consumption

Description

The H520-B module features two LED displays and a detailed bar graph for quick and clear visualization of the displayed liquid level. In addition to the absolute liquid level, the module also displays the liquid level as a percentage.
The integrated open-collector transistor switch can control a connected external relay or a visual or audible alarm based on preset threshold values.
The electronics of the H520-B level meter are fully integrated into the enclosure lid, which measures 80 x 120 x 15 mm. The level meter can therefore be mounted on the front panel of a control cabinet or a vehicle dashboard even without the bottom part of the housing.
The H520-B display module does not have its own power battery and therefore requires an external power supply in the range of 8 to 28 V DC / 0.15 A.

Applications

  • Display of the level measured by the control system (PLC)
  • Visualization of the filling levels of sumps, tanks, and reservoirs
  • Supplementary information display for control systems
  • External display unit for the driver's cab, compatible with the H500 level gauge (level gauge for fire trucks)

Technical specifications

Technical Specifications H520-B - Level Display Module
Display dual two-digit LED display, 15 mm high, bar graph with 3.5% increments
Level Display Resolution 0.1 m for a measurement range up to 10 m, 1 m for a measurement range greater than 10 m
Control Signal RS485, ModBus RTU slave protocol; 19,200 Bd
Communication Address 15 (selectable via on-board switches: 16, 17, 18)
Transistor output open collector, Umax = 28 V DC, Imax = 300 mA
Supply voltage/current 8–28 V DC, max. current draw 0.15 A (at 12 V)
Operating temperature -30 °C to +60 °C
Dimensions (W x H x D) 120 x 80 x 55 mm, 2 M12 cable glands on the bottom of the enclosure
Weight 180 g
Enclosure material polycarbonate
Protection rating IP66

Non-binding inquiry

H520-B – Level Display Module



    Contact

    Have a project or a question?

    Free consultation - our specialists will help you choose the right solution for your project.