TM172E28R Expansion Module – Analog & Discrete I/O for HVAC Control

The TM172E28R Expansion Module is part of Schneider Electric’s Modicon M171/M172 series, built specifically for HVAC applications. This module adds more flexibility to your system with 6 discrete inputs (including 2 high-speed up to 2kHz) and 10 configurable analog inputs—great for connecting sensors and monitoring devices.

The TM172E28R is compact, measuring just 72mm wide, and can be easily installed on a DIN rail or panel using mounting accessories. It’s certified by CE, RCM, EAC, CSA, and cURus, and meets several international standards for performance and safety.

Key Features of TM172E28R

• Model: TM172E28R
• Series: Modicon M171/M172
• Type: Expansion I/O Module
• Discrete Inputs: 6 total (2 high-speed up to 2kHz, 4 standard)
• Analog Inputs: 10 (configurable in pairs)
• Analog Outputs: 2 programmable
• Input Voltage: 24V AC/DC
• Protection Rating: IP20
• Mounting Options: DIN rail or panel with accessory
• Certifications: CE, RCM, EAC, CSA, cURus
• Standards: EN 60730-1, EN 60730-2-9, IEC 61000-4-2/3/5
• Dimensions: 72mm (W) x 59mm (D) x 110mm (H)
• Weight: 0.19kg

Whether you’re building a new HVAC system or expanding an existing one, the TM172E28R Expansion Module gives you the reliable inputs and outputs needed for smooth control and high energy performance