The SAE STAHL MT-50 Operator Panel (including variations like MT-50-DP and FP-ST) is a legacy industrial Human-Machine Interface (HMI) designed for machine control, parameter monitoring, and data entry in automation environments. These units were frequently paired with compact PLCs and motion controllers in specialized manufacturing equipment.

Product Overview

The MT-50 series provides operators with a durable interface for reading system status and configuring machine variables. Its compact design and membrane-style keypad are engineered to withstand the dusty or high-vibration conditions common in factory settings.

• Key Interface: Integrated alphanumeric display and customizable tactile membrane keys.
• Connectivity: Often features DP (Profibus) or serial (RS-232/RS-485) communication ports for direct PLC integration.
• Functionality: Supports real-time monitoring of process variables, alarm logging, and simplified machine sequence control.

Technical Specifications

• Display Type: Backlit LCD (typically 2-4 lines of text).
• Communication Port: DB9 or multi-pin terminal blocks for PLC protocols (depending on the specific “DP” or “FP-ST” sub-version).
• Operating Voltage: 24V DC.
• Housing: Industrial-grade plastic/metal enclosure with an IP-rated front panel (refer to the unit label for exact NEMA/IP rating).

Installation & Operational Tips

• Mounting: These panels typically use a panel-cutout snap-fit or bolt-down design. Verify your cutout dimensions match the MT-50 standard before attempting replacement.
• Communication Setup: Because these are often tied to specific PLC firmware (such as early Profibus protocols), ensure the communication baud rate and station address match your PLC’s network configuration.
• Backup Memory: If your panel is being replaced, you may need the original configuration software to download the program (project file) to the new unit, as these devices rarely feature “plug-and-play” data retention.