Lenze EPM-H505 Touch Panel

Designed to provide reliable operator interface capabilities in legacy industrial installations, the Lenze EPM-H505 serves as a robust human-machine interface (HMI) for real-time machine monitoring and control. Featuring a high-contrast 5.7-inch STN display with a resolution of 320 x 240 pixels, this unit utilizes four distinct blue tones to ensure optimal readability for operators under diverse factory lighting conditions. Engineered for seamless integration into existing control architectures, it operates on a standard 24 VDC power supply and communicates via an integrated RS-232 serial interface.

Key Features

• High-Contrast Display: 5.7-inch STN screen with 320 x 240 pixel resolution and 4 blue tones for clear visualization.
• Industrial Serial Communication: Built-in RS-232 interface for direct, point-to-point connection to PLCs and controllers.
• Integrated Software Clock: Enables precise time-stamping of system events, alarms, and operational logs.
• Efficient Power Design: Low-power consumption rated at 10 Watts on a standard 24 VDC input.
• Rugged Form Factor: Compact, durable construction designed to withstand harsh industrial environments.

Applications

• Legacy machine control panel replacements and system retrofits.
• Packaging machinery, material handling, and conveyor control systems.
• Local process monitoring and parameter adjustment in factory automation.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

The EPM-H505 is a legacy HMI. When replacing an active unit, ensure that you have a verified backup of the original HMI project file (.vzs or equivalent Lenze HMI Designer format). Direct runtime extraction from a damaged unit is often restricted or impossible depending on the original security configurations.

Application Pitfalls & Engineering Notes

Because this unit utilizes an STN display with 4 blue tones, its viewing angle is narrower than modern TFT displays. Avoid mounting the panel in locations with direct sunlight or high ambient glare. Additionally, ensure the 24 VDC supply is clean and isolated from heavy inductive loads to prevent communication dropouts over the RS-232 line.

Commissioning & Wiring Tips

When fabricating the RS-232 cable, always use high-quality shielded twisted-pair cabling and ground the shield at the controller side only. Keep the cable length under 15 meters to prevent signal degradation and electromagnetic interference (EMI) issues.

Installation Guidelines