Schneider Electric HMISTO735 Harmony STO 4.3-inch Wide Touch Panel Ethernet HMI Operator Panel

The Schneider Electric HMISTO735 is a Harmony STO touch panel screen with a 4.3-inch wide 480x272 colour display and a built-in Ethernet TCP/IP port supporting Modbus TCP, for PLCs networked over Ethernet rather than serial. It runs on EcoStruxure Operator Terminal Expert, operates from a 12-24 V DC supply, draws 8.1 W, and carries an IP65 front-panel rating.

Technical Specifications

Certifications & Standards

• CE
• C-Tick
• ATEX Zone 2/22
• KCC
• UL
• cUL
• UKCA
• UL 61010-2-201
• EN 61131-2
• EN 61000-6-2
• EN 61000-6-4
• CSA C22.2 No. 213
• CSA C22.2 No. 142
• UL 61010-1
• ANSI/ISA 12.12.01

Selection Notes

Choose the Ethernet-equipped HMISTO735 over the serial variant in the same range when the controller is networked over Modbus TCP rather than RS-232/485 — the Ethernet port replaces the serial RJ45 one-for-one, with the same 4.3-inch display, processor, and enclosure otherwise unchanged. Its 8.1 W draw runs slightly higher than the serial model's 7.5 W, the only practical trade-off for the networked interface.