Siemens AG 6AV3505-1FB01 OP5-A1 Operator Panel

The Siemens 6AV3505-1FB01 OP5-A1 Operator Panel is a compact SIMATIC HMI front-end designed for industrial automation, delivering a four-line, 20-character display that shows prompts and process data clearly to operators. Equipped with a single TTY/V.24 serial interface, this OP5/A1 unit communicates with compatible PLCs and control systems for straightforward text-based monitoring and input within control cabinets. Its enclosure measures 120 x 168 x 48 mm and weighs about 800 g, enabling panel mounting in tight spaces without sacrificing readability or accessibility. Part of Siemens’ SIMATIC HMI OP5 family, the OP5-A1 variant is commonly used as the operator interface for SIMATIC S7 controllers, providing a dedicated display and input channel for routine operator tasks. Note: 6AV3505-1FB01 is listed as discontinued by Siemens and many retailers; verify compatibility with your existing PLC project and confirm stock status before attempting replacements. Users typically deploy this panel in machine and process environments where a straightforward text-based user interface suffices for status checks, alarm acknowledgement, and basic parameter entry. The 4x20 character format keeps information compact yet legible, even in dim lighting when mounted in an enclosure. With its OP5-A1 designation, the unit shares mounting patterns and interface conventions with other OP5 submodels, facilitating replacement or upgrade within the same hardware family.