Siemens 6AV3515-1MA20 Human Machine Interface Panel

The Siemens 6AV3515-1MA20 is an OP15 operator panel in the SIMATIC HMI family, designed as a local human‑machine interface for industrial equipment and processes. It can be configured as OP15/C1 with either a 4‑line display at 20 characters per line or an 8‑line display at 40 characters per line, enabling concise status readouts or longer prompts within a single device. Built for industrial environments, it provides two serial interfaces (TTY/V.24) and one RS422/485 interface, plus eight softkeys for fast access to commonly used functions, and it includes 256 KB of user memory for storing screens, scripts, and local data to support responsive operator interactions. This model is commonly paired with PLCs in automated lines to present alarms, trends, input fields, and control options at the machine point of use. Note that 6AV3515-1MA20 is reported as discontinued, reflecting its status in older or legacy installations while replacement panels from the SIMATIC range may be recommended for new designs.