SIEMENS 6AV6643-0BA01-1AX0

What is the 6AV6643-0BA01-1AX0 (OP 277 6")?

The 6AV6643-0BA01-1AX0 is a Siemens SIMATIC OP 277 6" operator panel designed for legacy industrial automation systems. It is an HMI device with a TFT display and key-based operation (no touchscreen) and is typically used as a 1:1 replacement in installed systems where the original operating concept relies on physical function and system keys.

Siemens specifies that it is engineered with WinCC flexible 2005 Standard SP1 or higher, which allows many existing legacy projects to remain usable without requiring immediate system migration.

Technical key data at a glance

The OP 277 provides 4 MB user memory (Flash/RAM) and up to 64 MB main memory capacity. The front is rated IP65, while the rear is IP20.

For installation planning, Siemens specifies a front width of 308 mm, front height of 204 mm, and an installation depth of 59 mm. The panel is designed for vertical mounting, which is important for direct replacement scenarios in existing control cabinets.

Display: 5.7" TFT (320 × 240, 256 colours) and backlight

The device uses a 5.7" TFT display with 320 × 240 resolution and 256 colours. Siemens specifies a backlight MTBF of approximately 60,000 hours (at 25 °C).

From a maintenance perspective, a dark or uneven display is often an indicator of backlight ageing. Because resolution and colour depth are fixed, existing HMI screens can usually be reused without layout changes when replacing the same model.

Operation: membrane keyboard, function keys and system keys

Operation is performed via a membrane keyboard with 24 programmable function keys, 18 of which include LEDs, plus system keys. The device also supports numeric input, while alphanumeric input is handled on-screen.

A key point is that this model is non-touch, meaning machine operation continues entirely via physical keys and LED feedback, which is essential in validated or long-established machine concepts.

Communication: MPI/PROFIBUS-DP, Ethernet and PROFINET

For integration, Siemens specifies 1× RS485, 1× RS422, and 1× Ethernet (RJ45). Transfer is possible via MPI/PROFIBUS-DP, USB, and Ethernet, including automatic transfer detection.

The device also supports PROFINET IO, but not PROFIsafe. In practice, this allows operation in both classic MPI/DP systems and mixed Ethernet-based architectures, depending on the project setup.

Interfaces & media: USB and MultiMediaCard

The OP 277 includes 1× USB interface (up to 1 GB support according to Siemens) and a MultiMediaCard slot (up to 128 MB).

The MMC is used for archiving, backup, and data export (e.g. CSV formats). A common practical issue is the use of incompatible or oversized memory cards, so correct media selection is important for reliable service operations.

Engineering: WinCC flexible 2005 Standard SP1 or higher

Engineering is performed using WinCC flexible Standard 2005 SP1 or higher. This is often critical in legacy environments: if the original project files and software version are available, replacement is usually straightforward.

If project data or engineering environments are missing, even a mechanically compatible replacement can lead to significant commissioning delays. Therefore, securing project files, transfer method (MPI/USB/Ethernet), and media configuration is essential.

Lifecycle: “blocked for delivery” and service relevance

According to Siemens documentation, the product has been blocked for delivery since 01.01.2015 and is no longer available as a new standard item.

This makes repair, exchange units, and spare-part strategies essential for continued operation of installed systems.

Repair & exchange: turnaround time, test report, warranty

According to EICHLER service data, repair is typically available within 1–3 days, as is exchange and refurbished delivery. An optional test report (“Operator panel with key”) is available.

Repairs typically include cleaning, preventive maintenance, functional testing, and a minimum 24-month warranty, which helps reduce downtime risk in production environments.

Identification & procurement: MPN, EICHLER number, EAN/UPC

For procurement clarity, the key identifiers are: MPN: 6AV6643-0BA01-1AX0, EICHLER article number: K0170441, EAN: 4025515074137 and UPC: 662643209549. These identifiers are important because OP 277 variants differ in interface configuration, key layout, and engineering compatibility, and correct identification prevents incorrect replacements and unnecessary downtime.

What is the 6AV6643-0BA01-1AX0 particularly suitable for?

It is used as an OP 277 6" operator panel in legacy systems, especially where a non-touch key-based HMI with TFT display needs to be replaced 1:1 without changing the existing machine operation concept.

Which display data are critical for replacement?

The panel features a 5.7" TFT display with 320 × 240 resolution and 256 colours, and a backlight MTBF of 60,000 hours.

Which interfaces does the panel support?

It supports RS485, RS422, Ethernet (RJ45), USB, and a MultiMediaCard slot, making it suitable for both classic fieldbus and Ethernet-based Siemens environments.

Which engineering software is required?

Engineering is performed with WinCC flexible Standard 2005 SP1 or higher.

How fast are repair or exchange services available?

At EICHLER, repair, exchange, and refurbished units are typically available within 1–3 days. An optional paid test report is available, and depending on the service package, a warranty extension of up to 36 months can be included.