Siemens 6AV3535-1FA41-0BX0 Membrane Keypad Switch

Direct Keypad Interface for SIMATIC S5 Operator Panels

The 6AV3535-1FA41-0BX0 membrane keypad switch provides a rugged and reliable operator interface for Siemens OP35 operator panels. This direct keypad component serves as the primary input mechanism for the OP35 unit, featuring a durable membrane construction suitable for industrial environments. Siemens has discontinued this product, with an end-of-production date of April 15, 1997.

Technical Specifications

Keypad Construction and Features

The 6AV3535-1FA41-0BX0 utilizes membrane switch technology, which comprises multiple flexible layers of polymer films and adhesives. This construction offers superior moisture resistance without requiring individual seals around each key. The membrane design also provides a low-profile interface that is easy to clean and sanitize.

System Compatibility

This keypad switch integrates with the OP35 operator panel, which features a monochrome pixel-graphic LCD display. The OP35 includes four integrated interfaces (2x TTY/V.24, X.27/TTY, MPI/PPI) and accommodates a 3.5″ drive. The direct keypad design ensures responsive operator input for SIMATIC S5 systems.

Product Status and Replacement

Siemens discontinued the 6AV3535-1FA41-0BX0 effective April 15, 1997. Users may still source this legacy component through industrial automation distributors offering new old stock or refurbished units. For new installations, Siemens recommends migrating to current HMI platforms.