Siemens 6AV9020-1DB00 PBT20 Membrane Keyboard

The 6AV9020-1DB00 is a heavy-duty industrial membrane keyboard from the PBT20 series. Designed for reliability in demanding environments, this 92-key desktop unit features an international layout and utilizes specialized serial communication protocols (TTY/X.27), making it a critical component for legacy Simatic S5 systems and dedicated industrial terminals.

Core Specifications

Installation & Commissioning Guidelines

To ensure the long-term reliability of the 6AV9020-1DB00, please adhere to the following technical requirements:

1. Interface Compatibility:

   This unit is not a standard USB or PS/2 device. It uses TTY (Current Loop) and X.27 (RS-422) serial interfaces. Confirm that your host controller (e.g., PLC communication module or industrial PC card) supports these physical layers before connection.

2. Environmental Integrity:

   The IP54 rating protects against dust ingress and liquid splashes from any direction. However, for desktop versions, avoid areas where standing water may accumulate. Ensure the mounting surface is level to prevent chassis torsion.

3. Shielding & Grounding:

   In high-EMI (Electro-Magnetic Interference) industrial environments, use shielded communication cables. The shield must be properly grounded at the system end to prevent data corruption or signal noise.

4. Legacy Replacement:

   When replacing the predecessor model 6ES5982-2AA11, verify that the current system software correctly maps the 92-key matrix, as key assignments may vary between older firmware versions.

Frequently Asked Questions (FAQs)

Q1: Can this keyboard be connected to a modern PC?

A: Not directly. Because it utilizes TTY/X.27 protocols, a specialized TTY-to-RS232/USB converter is required. Additionally, custom driver software may be needed to translate the 92-key scan codes into standard HID inputs.

Q2: What does the IP54 rating guarantee in a factory setting?

A: IP54 ensures that the keyboard is protected against dust deposits that could interfere with operation and is resistant to water splashes. It is ideal for machine shops and control rooms but is not designed for high-pressure wash-down environments.

Q3: Why is the unit significantly heavier (5.4kg) than standard keyboards?

A: The PBT20 series features a heavy-duty metal chassis and reinforced membrane layers. This weight provides extreme durability and ensures the keyboard remains stable on a desktop during high-intensity operator input.

Q4: What is the primary difference between TTY and X.27 interfaces?

A: TTY uses a 20mA current loop, which is highly resistant to noise over long distances in older plants. X.27 is a differential voltage interface (equivalent to RS-422), offering high-speed, balanced data transmission. This unit supports both to maximize compatibility with legacy Siemens infrastructure.