Siemens 6AV2128-3MB27-0BX0 SIMATIC MTP1200 PRO 12.1-inch Support Arm HMI Extension Unit

The Siemens 6AV2128-3MB27-0BX0 is a SIMATIC HMI MTP1200 PRO Unified Comfort extension unit built for an expandable support arm on round pipe, with a 12.1-inch widescreen TFT touchscreen at 1280 x 800 pixels. It carries IP65 protection front and rear, runs on 24V DC, and communicates over PROFINET, configurable from WinCC Unified Comfort V18 upward.

Technical Specifications

Certifications & Standards

• CE
• UKCA
• cULus
• FM
• RCM
• KC
• EAC
• CCC

Selection Notes

The round-pipe support-arm mount is expandable, so this extension unit is the pick when the arm run needs to grow after the initial install, unlike the fixed flange-top mount on the -0AX0 operator panel variant. Both share the same 12.1-inch display, IP65/NEMA rating, and PROFINET interface, so the mounting geometry is the only variable that decides between them. IP65 front and rear holds up in washdown-adjacent cells without the stainless housing of the hygienic MTP1200.