Omron NT31-ST121-EV2 – NT31 Programmable Terminal, 5.7″ Monochrome STN Touch Screen
The Omron NT31-ST121-EV2 is a programmable terminal (HMI) from Omron’s NT31 series, with a 5.7-inch monochrome STN touch screen at 320 × 240 pixels. The “E” in the model number indicates the English-language version.
The NT31 was widely used as an operator panel for Omron SYSMAC PLCs (C-series, CV-series and CS/CJ-series), connected via RS-232C or RS-422A/485 using Host Link or NT Link. Thousands of machines built in the late 1990s and 2000s still run with NT31 terminals, so a direct replacement is the fastest way to get a machine back into production without redesigning screens or panel cut-outs.
Key Technical Data – Omron NT31-ST121-EV2
- Product type: Programmable terminal / HMI, Omron NT31 series
- Display: 5.7″ monochrome STN LCD, touch screen
- Resolution: 320 × 240 pixels (QVGA)
- Communication: RS-232C and RS-422A/485; Host Link, NT Link
- Compatible PLCs: Omron C-series, CV-series, CS/CJ-series
- Power supply: 24 V DC (20.4–27.6 V DC)
- Front panel protection: IP65
- Programming software: Omron NT Support Tool
- Language version: English (E)
- Lifecycle: Discontinued (end of March 2005); recommended replacement NT31-ST122-EV2
NT31-ST121-EV2 or NT31-ST122-EV2?
- NT31-ST121-EV2: the original model
- NT31-ST122-EV2: Omron’s recommended replacement, with identical panel cut-out, wiring and connectors, fully compatible screen data and PLC program, and a long-life backlight that doesn’t need replacing
The “B” versions (e.g. NT31-ST121B-EV2) are the same terminals with a different housing colour. Our sales team will confirm the exact version you need.
Typical Applications
- Direct replacement of failed NT31 terminals on existing machines
- Spare HMIs for machines with Omron SYSMAC PLCs
- Packaging, food processing and general factory automation equipment
Buy Omron NT31-ST121-EV2 from Atlantech Drives
- Fast sourcing of obsolete HMIs, shipped worldwide
- 12-month warranty
- Senior commercial advice on replacement options and lead time
- Quick, no-obligation quotes: get a quote today
