D5100 dual-screen digital display indicator with LED display for industrial process monitoring
D5100 dual-screen digital display indicator with LED display for industrial process monitoring

Dual-Screen Digital Display Controller – D5100

Industrial dual-screen digital display controller for multi-signal process monitoring and control.
The D5100 collects and visualizes temperature, pressure, flow, and level signals from industrial sensors. With RS485/RS232 communication, programmable alarm modes, and dual-screen display, it integrates seamlessly with VFDs, PLCs, SCADA systems, and building automation, making it ideal for advanced industrial, laboratory, packaging, and HVAC applications.

Applications

  • Industrial process automation: temperature, pressure, flow, and level monitoring

  • HVAC & building automation: fan, pump, and VFD control loops

  • Laboratory & R&D process monitoring

  • Packaging, food & beverage processing

  • Water & wastewater treatment monitoring

  • Industrial manufacturing requiring multi-channel signal visualization

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Description

The D5100 Dual-Screen Digital Display Controller is an industrial-grade, multi-signal process display designed for precise monitoring, control, and data visualization in complex automation systems. Its dual LED display allows operators to simultaneously monitor two critical process signals, such as temperature, pressure, flow, or liquid level.

Equipped with 39 fully switchable signal inputs, the D5100 can handle multiple sensor types, including thermocouples, RTDs (PT100/PT1000), voltage, current, and resistance inputs. The controller supports remote transmission, alarm handling, and printing, providing a fully integrated digital acquisition and control solution.

RS485 and RS232 communication, including MODBUS protocol, allows seamless connection with PLCs, SCADA systems, VFDs, and building automation systems, ensuring reliable process control and energy-efficient operation.

Application-Specific Engineering Recommendations

The D5100 is designed for industrial and building automation environments where accurate visualization, stable control, and reliable communication are critical. Below are practical recommendations based on typical engineering use cases.

1️⃣ HVAC & Building Automation Systems

Recommended configuration:

  • Inputs:

    • Temperature (PT100 / PT1000)

    • Differential pressure or airflow (4–20 mA or 0–10 V)

  • Communication:

    • RS485 (MODBUS RTU) to BMS or PLC

  • Use with VFDs:

    • Display real-time fan or pump feedback

    • Monitor control signals sent to the VFD

Engineering note:
Dual-screen display allows simultaneous monitoring of supply air temperature and fan speed / pressure, which simplifies commissioning and fault diagnosis.

2️⃣ Pump & Water / Wastewater Systems

Recommended configuration:

  • Inputs:

    • Pressure or level transmitters (4–20 mA)

    • Flow meters (4–20 mA)

  • Outputs:

    • Alarm relay for high/low pressure or level protection

  • Integration:

    • RS485 communication with PLC or SCADA

Engineering note:
Use alarm thresholds to protect pumps from dry running, cavitation, or overpressure, especially in VFD-controlled booster and lift stations.

3️⃣ Industrial Process Automation

Recommended configuration:

  • Inputs:

    • Thermocouples or RTDs for temperature

    • Current or voltage signals from process sensors

  • Display setup:

    • Upper display: primary process variable

    • Lower display: secondary variable or setpoint

  • Communication:

    • RS485 / RS232 for data acquisition systems

Engineering note:
Parameter locking is recommended after commissioning to prevent unauthorized changes in production environments.

4️⃣ Laboratory & Quality Control Applications

Recommended configuration:

  • Inputs:

    • High-accuracy temperature or pressure sensors

  • Display mode:

    • High-resolution numerical display with bargraph

  • Data handling:

    • Connect to external logging or printing systems if traceability is required

Engineering note:
For stable laboratory conditions, use signal filtering functions to minimize display fluctuations caused by electrical noise.

Signal & Power Recommendations

  • Use shielded cables for low-level signals (RTD, thermocouple)

  • Ground signal shields at one end only to avoid ground loops

  • Ensure power supply stability within specified voltage ranges

  • Keep signal and power cables physically separated where possible

System Design Support

Correct selection of input signal type, alarm logic, and communication interface is essential for reliable operation.

At LONGVISTA, we support engineers and system integrators with:

  • Application-based device selection

  • Signal compatibility checks with sensors and VFDs

  • HVAC, water, and industrial automation system design guidance

Contact us for application-specific engineering support.

 

Features

  • Dual-screen LED display for simultaneous monitoring of two process signals

  • 39 fully switchable signal inputs for multi-channel integration

  • Multi-function: measurement, alarm, communication, printing, and feed output

  • Compatible with voltage, current, thermocouple, RTD, and resistance signals

  • Programmable alarm modes and parameter locking

  • RS485 (MODBUS RTU, up to 1 km) and RS232 (up to 15 m) communication

  • High accuracy: 0.2% FS ±1 bit

  • Display range: -1999 ~ 9999; 0–100% bargraph visualization

  • Panel touch key interface for easy operation and secure settings

  • Wide operating environment: 0–50°C, relative humidity ≤85% RH

  • Low power consumption: ≤5 W; AC 100–240V or DC 20–29V

 

 

Specification

Parameter Specification
Accuracy 0.2% FS ±1 bit
Display Range -1999 ~ 9999; bargraph 0–100%
Input Signals Voltage, current, resistance, thermocouple, RTD
Input Impedance ≤250Ω / ≥500KΩ (signal-dependent)
Maximum Input Current ≤30 mA
Maximum Input Voltage ≤6 V
Output Signals Current, voltage, relay, 24V distribution / feeder
Output Load Capability ≤500Ω / ≥250 KΩ (module-dependent)
Communication RS485 (MODBUS, up to 1 km), RS232 (up to 15 m)
Power Supply AC 100–240V (50/60 Hz) or DC 20–29V
Operating Temperature 0–50°C
Relative Humidity ≤85% RH (non-condensing)

 

FAQ

1. What is the D5100 Digital Display Indicator used for?

The D5100 is an industrial digital display indicator used to collect, display, control, and transmit process signals such as temperature, pressure, level, flow, and speed. It is commonly applied in HVAC systems, pump stations, industrial process automation, laboratories, and manufacturing equipment.

2. What input signals does the D5100 support?

The D5100 supports a wide range of fully switchable input signals, including:

  • Current: 4–20 mA, 0–20 mA

  • Voltage: 0–5 V, 0–10 V

  • Resistance: PT100 / PT1000

  • Thermocouples

This makes it compatible with most industrial and building automation sensors.

3. Can the D5100 work with VFD-controlled systems?

Yes. The D5100 is well suited for VFD applications, including:

  • Displaying feedback signals from pumps or fans

  • Monitoring pressure, temperature, or flow controlled by a VFD

  • Providing alarm outputs for system protection

Its RS485 (MODBUS) communication allows easy integration with PLCs and VFDs in HVAC and water systems.

4. What is the difference between the D5100 and a basic display controller like the D1100?

  • D5100:

    • Dual-screen LED display

    • Higher accuracy (0.2%FS)

    • More input/output options

    • Advanced communication and alarm functions

  • D1100:

    • Single-loop controller

    • Simpler configuration

    • More cost-focused applications

D5100 is recommended for complex systems, while D1100 fits simpler control tasks.

5. Does the D5100 support communication with PLC or BMS systems?

Yes. The D5100 supports:

  • RS485 (MODBUS RTU) – up to 1 km communication distance

  • RS232 – for short-distance connections

An active communication converter is recommended when integrating with external systems.

6. Can the D5100 provide power to external sensors?

Yes. The D5100 can provide 24 V DC sensor power output (≤30 mA), suitable for many pressure, temperature, and flow transmitters.

7. How accurate is the D5100?

The D5100 offers an accuracy of 0.2% FS ± 1 digit, making it suitable for both industrial control and measurement monitoring applications.

8. Is the D5100 suitable for HVAC and building automation?

Absolutely. Typical HVAC applications include:

  • Air handling units (AHU)

  • Pump and fan monitoring

  • Differential pressure and temperature display

  • Integration with BMS via MODBUS

Its dual-screen display allows simultaneous monitoring of two key parameters, improving system visibility.

9. Can settings be locked after commissioning?

Yes. The D5100 supports parameter locking, allowing engineers to prevent accidental or unauthorized changes after commissioning.

10. What is the operating environment for the D5100?

  • Ambient temperature: 0 ~ 50 °C

  • Relative humidity: ≤ 85% RH (non-condensing)

  • Should be installed away from strong corrosive gases

These conditions make it suitable for control panels in industrial and building environments.

11. Does LONGVISTA provide application or selection support?

Yes. LONGVISTA supports engineers and system integrators with:

  • Signal compatibility checks

  • VFD and sensor integration guidance

  • HVAC, water, and industrial automation application support

You can contact us for application-specific recommendations before ordering.

 

 

Datasheet

Dual-Screen Digital Display Controller – D5100 – Datasheet

 

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