OMRON NT series programmable terminal

1. Product positioning and series overview

The NT series is an Omron programmable terminal (HMI) that focuses on high compatibility and easy-to-use editing software, used for industrial equipment monitoring, I/O annotation loading, and on-site system maintenance.

Core values: Reusable screen data, strong editing and simulation capabilities, one click program transmission to enhance operational efficiency.

2. Comparison of Core Model Specifications (Key Parameters)

Model Display Type Resolution Effective Display Size Maximum Touch Switch Power Consumption Weight

NT631C-ST153 (B) – EV3 TFT color 640 × 480 10.4 inches (211 × 158mm) 32 × 24=768 18W max 2.5kg max

NT31C-ST143 (B) – EV3 STN Color 320 × 240 5.7 inches (118 × 89mm) 16 × 12=192 15W max 1kg max

NT31-ST123 (B) – EV3 STN monochrome 320 × 240 5.7 inches 16 × 12=192 15W max 1kg max

NT20-ST121 (B) STN monochrome 256 × 128 57.6 × 115.2mm 12 × 6=72 10W max 0.7kg max

3. General Electric and Environmental Regulations

Power supply: 24VDC, allowable range 20.4~26.4VDC

Working environment: temperature 0~50 ℃, humidity 35%~85% (no condensation)

Protection level: IP65 front panel, NEMA4, oil resistant

Reliability: anti vibration of 5-150Hz, anti impact of 147m/s ², backlight life of 50000 hours

Touch lifespan: ≥ 1 million times, operating force * * ≤ 1N**

4. Communication interface and compatible host

interface configuration

NT631C: RS-232C × 2 RS-422A/485、 print port

NT31/NT31C: RS-232C × 2, printing port

NT20：RS-232C×2

Supported Protocols

NT Link (1-to-1/1-to-N/high-speed) Host Link、Memory Link

Third party PLC compatibility

Mitsubishi FX/A series, AB SLC 5/02~05, GE Fanuc 90 series, Siemens S7-300/400

5. Software and optional accessories

Supported software: NT-ZJCAT1-EV4, supports Windows 98/NT/2000/XP/Vista/7 (excluding XP 64 bit)

Core accessories:

Memory unit: NT-MF261 (universal for all three models)

Communication cable: XW2Z series (2m/5m)

Battery: C500-BAT08 (universal for all three models)

Protective accessories: anti reflective film, protective cover, chemical resistant silicon sleeve

6. Display and functional capabilities

Maximum registration screen: NT631C/NT31:3999 screen; NT20:495 screen

Screen types: Normal, Overlay (up to 8 layers), Window (up to 3)

Display elements: characters, graphics, bar charts, trend charts, alarm lists, history records

Language support: Japanese, English, Simplified Chinese, Traditional Chinese (NT20 requires specific model)

7. System Programs and Compatibility

The system program needs to be downloaded using a dedicated installer

NT31/631: Only System Installer V2 supports Ver.4. x systems

NT20: Only supported by System Installer V2.1, incompatible with lower versions

Screen data: NT20/NT20S compatible, NT20M incompatible

Key questions and answers

Question 1: What are the differences in the downtime and core display of the three main models in the NT series?

Answer: NT31/NT31C was discontinued at the end of March 2014 and features a 5.7-inch STN monochrome/color screen; NT2020 will be discontinued at the end of September 2015 for small-sized STN monochrome screens; NT631C is a 10.4-inch TFT color screen with a resolution of 640 × 480, making it the highest display specification model in the series.

Question 2: What third-party PLCs are compatible with the NT series, and what are the core communication interfaces?

Answer: Compatible with Mitsubishi AB、GE-Fanuc、 Siemens brand mainstream PLC; The core communication interfaces are RS-232C, RS-422A, RS-485, supporting NT Link, Host Link, and Memory Link communication protocols.

Question 3: What are the supporting software and essential accessories of the NT series, and what are the limitations on system program transmission?

Answer: The supported software is NT-ZJCAT1-EV4; Essential accessories include NT-MF261 memory unit, XW2Z communication cable, C500-BAT08 battery; The system program requires a dedicated installer for transmission. NT31/631 only supports Ver. 4. x for V2 installers, while NT20 only supports V2.1 installers for transmission. Low versions are not compatible.