Arkel KM-20 SCR Keypad & Display Module: Advanced Interface for Door Controllers

The Arkel KM-20 SCR is an external user interface terminal designed specifically for the KM-20 Automatic Door Controller. While the KM-20 board features a basic onboard interface, the KM-20 SCR Keypad provides a user-friendly 2-line 16-character LCD screen, allowing elevator technicians to access advanced menu levels, perform fine-tuning, and view detailed diagnostic messages easily.

Technical Specifications: KM-20 SCR

Product Description

The Arkel KM-20 SCR is an essential peripheral for elevator professionals working with the KM-20 Door Controller. While the main controller board includes a limited interface, the KM-20 SCR Keypad is required to unlock the full range of the system’s capabilities. It connects directly to the KM-20 via a dedicated socket, providing an ergonomic interface for installation and maintenance.

Advanced Configuration: Using the KM-20 SCR, technicians can access the Basic and Manufacture menu levels. This allows for the precise adjustment of critical parameters such as opening/closing ramp lengths, specific speed settings for different travel zones, and motor reduction ratios. These settings are crucial for achieving the perfect “S-curve” motion for passenger comfort.

Diagnostics and Monitoring: The module serves as a powerful diagnostic tool. Unlike the cryptic codes on a 7-segment display, the KM-20 SCR provides readable text for status and error messages (e.g., “CLS. OBSTRUCTION”). It also features a Counter Screen to track the total number of door opening/closing cycles, which is vital for predictive maintenance schedules.

Frequently Asked Questions (FAQs)

Q1: Is the KM-20 SCR Keypad required for the standard operation of the door?

No, the KM-20 door controller can operate without the keypad once it is set up. However, the keypad is highly recommended (or required) for initial commissioning, fine-tuning advanced settings, and detailed troubleshooting,.

Q2: What is the difference between the onboard display and the KM-20 SCR Keypad?

The onboard display is a simple 2-digit 7-segment screen that allows access to a Limited set of parameters. The KM-20 SCR features a full LCD screen that provides access to Basic and Manufacture levels, allowing for much more detailed configuration and readable error messages.

Q3: Can I view the door speed and position with this unit?

Yes. The main monitoring screen on the KM-20 SCR displays real-time data, including the door’s current position (in cm), the door’s speed (in cm/s), and the current operating status (e.g., Opening, Closed).

Q4: How do I enter the advanced “Manufacture” menu using this keypad?

To access the Manufacture level parameters, you generally need to de-energize the KM-20, then re-energize it while pressing and holding the UP and DOWN buttons on the keypad together. This unlocks parameters like Gear Ratio and Encoder Pulse settings.