Original OMRON NT31-ST121-V2 5.7" Monochrome HMI Touch Screen Operator Panel
Original OMRON NT31-ST121-V2 5.7" Monochrome HMI Touch Screen Operator Panel
Price: $40.00
$30.00/ piece
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OMRON NT31-ST121-V2 5.7 inch monochrome HMI touch screen operator panel front view
OMRON NT31-ST121-V2 5.7 inch monochrome HMI touch screen operator panel front view

Original OMRON NT31-ST121-V2 5.7" Monochrome HMI Touch Screen Operator Panel

Price: $40.00
$30.00/ piece
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Original OMRON NT31-ST121-V2 5.7" Monochrome HMI Touch Screen Operator Panel

Product Information Product Specifications
Model:
NT31-ST121-V2
Application:
Industrial
Ordering instructions
Quality:
test ok before ship it
RMA Policy:
RMA 6 month
Sample:
Paid Sample
Stock:
15
Stock Location:
China
Delivery:
WorldWide
Lead Time:
1-3 Days
Weight:
0.500 KG
Overview

Product Introduction

The OMRON NT31-ST121-V2 is a highly reliable 5.7-inch Programmable Terminal (PT) engineered for seamless interaction with industrial PLCs and automation controllers. Featuring a crisp STN monochrome LCD with a responsive analog resistive touch screen, this operator panel allows factory personnel to monitor machine status, adjust parameters, and trigger alarms in real-time. As a core component of the legendary OMRON NT31 series, the NT31-ST121-V2 communicates effortlessly via standard RS-232C or RS-422A interfaces, ensuring broad compatibility with SYSMAC, Mitsubishi, and other major PLC platforms. Because this specific model has been discontinued by the manufacturer, sourcing a fully functional, tested replacement is critical to preventing costly production downtime. At ZY LCD Shop, we specialize in legacy industrial automation hardware. Every NT31-ST121-V2 unit undergoes rigorous testing for touch coordinate accuracy, communication stability, and backlight clarity before dispatch. Restore your control cabinet today with our guaranteed authentic, plug-and-play HMI terminals.

Core Product Features

  • Responsive Resistive Touch Screen: High-sensitivity analog touch membrane designed to register inputs accurately even when operators are wearing standard industrial work gloves.

  • High-Contrast STN Monochrome Display: The 5.7-inch STN LCD provides exceptional text legibility and clear graphical rendering under harsh factory lighting conditions without color distortion.

  • Universal PLC Communication: Equipped with dual-compatible RS-232C and RS-422A serial ports, allowing direct connection to OMRON SYSMAC, C-series, and various third-party PLCs.

  • Compact Control Cabinet Footprint: The space-saving 5.7-inch form factor fits perfectly into tight electrical enclosures and legacy operator consoles without requiring panel cutout modifications.

  • NT Support Tool Compatible: Fully programmable using OMRON's standard NT Support Tool software, making it easy to upload existing programs from a broken unit or create new interfaces.

  • Rugged Industrial Build: Engineered to withstand continuous 24/7 operation, electromagnetic interference (EMI), and temperature fluctuations typical in manufacturing environments.

Technical Specifications

ParameterSpecification Details
Part NumberNT31-ST121-V2
ManufacturerOMRON Corporation
SeriesNT31 Programmable Terminal
Display Size5.7 Inch
Display TypeSTN Monochrome LCD (Blue/Yellow-Green mode)
Touch Panel TypeAnalog Resistive Touch Screen
Communication InterfaceRS-232C / RS-422A
Power Supply24 VDC (Typical Industrial Standard)
Memory CapacityInternal Flash ROM for screen data storage
Panel Cutout DimensionsVerify against original installation manual
Target ApplicationPLC Control Panels, Factory Automation, Packaging Lines

Typical Applications

  • PLC Operator Interfaces for Packaging & Bottling Machinery

  • CNC Machining Centers & Metalworking Control Consoles

  • Injection Molding Machines & Plastic Extrusion Lines

  • Conveyor Systems & Material Handling Automation

  • HVAC Control Systems & Water Treatment Plant Dashboards

Why Source from ZY LCD Shop?

  • Legacy Automation Specialists: We understand that a failed HMI halts the entire production line. We maintain deep inventory of discontinued OMRON NT31 terminals to keep your factory running.

  • 100% Functional Testing: Unlike sellers offering untested "as-is" pulls, every NT31-ST121-V2 is powered up and tested for touch calibration, serial communication handshakes, and display contrast.

  • Secure Industrial Packaging: HMI terminals contain sensitive glass and logic boards. We use custom EPE foam, anti-static shielding, and heavy-duty cartons to prevent transit damage.

  • Expert Technical Guidance: Our team understands OMRON architecture and can provide basic guidance on NT Support Tool connections and DIP switch configurations for PLC communication.

FAQ (Frequently Asked Questions)

Is the NT31-ST121-V2 a complete HMI unit or just the replacement touch glass?

The NT31-ST121-V2 refers to the complete Programmable Terminal assembly, which includes the outer casing, the STN monochrome LCD, the internal motherboard, and the front touch membrane. If you only need the outer plastic touch digitizer sheet to fix an unresponsive screen, please specify that you are looking for the "touch overlay/membrane only" when contacting us.

Can I directly replace my old broken OMRON NT31 with this NT31-ST121-V2?

Yes, if your original unit is an NT31 series terminal, the NT31-ST121-V2 is a direct mechanical and electrical drop-in replacement. The panel cutout dimensions and 24V DC power wiring remain identical. However, you will need to upload your existing screen program from the old unit using OMRON's NT Support Tool software via a PC connection.

What is the difference between the NT31-ST121-V2 and the older NT31-ST121 (without V2)?

The "-V2" suffix indicates Version 2, which is an upgraded hardware revision by OMRON. It features improved internal components, better communication stability, and enhanced firmware compatibility compared to the original non-V2 version. The V2 is fully backward compatible and serves as the correct replacement for the older models.

Product Comparison
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Viewing Angle:
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Panel Type:
NT31-ST121-V2 is a Display screen Product from .According to 's product specification sheet,NT31-ST121-V2 display has a resolution of , Contrast Ratio is ,Viewing Angle is ,Lamp Type is ,Signal Interface is ,Brightness is .Based on its characteristics, this model is recommended for application in Industrial and other products.The weight of NT31-ST121-V2 after packaging is 0.500KG.We have made every effort to minimize weighing variances; however, we cannot guarantee absolute accuracy.
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Original Factory-Sealed Panels

Every unit is sourced directly from AUO Optronics through Zhiyan's first-hand supply channel. No refurbished, no B-grade. Factory seal intact.

100% Original | Factory Sealed
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100% Pre-Ship Testing & 6-Month RMA

Each panel passes through our six-step quality chain—incoming, display, appearance, interface, packaging, and tracking. Backed by a 6-month RMA.

Test OK Before Ship | RMA 6 Months
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99 Units In Stock · Ships in 1–3 Days

Stocked in our Shenzhen Longhua warehouse. Standard lead time 1–3 business days; quotations returned within 24 hours.

99 In Stock | Lead Time 1-3 Days
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Worldwide Shipping with Full Tracking

DHL, FedEx, UPS and TNT available. ESD-safe packaging. Typical door-to-door delivery: 5–7 business days globally.

DHL · FedEx · UPS · TNT | Worldwide

Quality issue? Return freight is on us. Damaged in transit? We cover it in full.

Why 1,000+ Engineers Trust Zhiyan Since 2013

factory 18 Years of Industrial LCD Supply Chain Expertise

  • warehouse 30,000+ m² ready-to-ship warehouse with tens of millions of dollars of LCD inventory on hand
  • category 100,000+ LCD models covered — from mainstream panels to discontinued & hard-to-find EOL models
  • groups 200+ staff, including a dedicated engineering team of 10+ for pre-sales matching and after-sales support
  • handshake Direct factory sourcing from Kyocera, KOE, and NANYA; long-standing supply partnerships across Taiwan and South Korea
  • sync One-stop service: sourcing → evaluation → testing → packaging → global logistics → technical support

fact_check 6-Step Inspection — No Panel Ships Untested

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monitor Display Test
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  • done_all Every panel is visually inspected, electrically powered-on tested, and interface-verified before packing
  • inventory_2 Anti-static, shock-proof professional packaging for international transit
  • verified What you see is what you get — product consistent with description, or return freight on us

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Alibaba Verified Supplier Certificate
CITEO Membership Certificate
Der Grüne Punkt License
LUCID Registration Certificate
  • check TÜV Rheinland On-Site Verified Supplier (Alibaba.com Verified Supplier, Cert. No. 139632585_T) — factory audit covering production capacity, quality assurance & R&D
  • check EU Authorized Representative (EC REP) appointed — EUREPSTAR GmbH, Germany, valid 2025–2027, CE technical files maintained
  • check CITEO Registered (France, packaging EPR compliance, ID: FR293377_01SEXD)
  • check Der Grüne Punkt Licensed (Germany, VerpackG packaging compliance, Reg. No. DE4833497804557)
  • check All panels RoHS 2.0 compliant, lead-free, mercury-free WLED backlight
  • check Registered company: Shenzhen Zhiyan Optoelectronics Co., Ltd. — VAT/Reg. No. 91440300MA5GQNC36C

precision_manufacturing Trusted Across 13+ Industries Worldwide

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HMI panels & factory control displays for automation integrators

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Replacement screens & bulk supply for POS/ATM manufacturers

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Custom display solutions: touch bonding, brightness, cables, OEM labeling

Send us your LCD model number, application and quantity — our engineers will recommend a compatible solution within 24 hours.

local_shipping In Stock. Tested. Shipped in 1–3 Days.

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1–3 day lead time for in-stock items; same-day dispatch available in some cases

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Worldwide shipping via express couriers, full tracking from warehouse to door

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Every order follows the same chain: Warehouse → QC → Packaging → Shipping → You

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Transportation damage covered by us — zero risk on your side

What Buyers Say — 4.8/5 from Verified Orders

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local_shipping On Delivery

"My package arrived at the expected date (6 days after the purchase) and in good condition."
— Verified Buyer, Nov 2025

"Fast shipping, good communication, goods as described, will buy again."
— Verified Buyer, Aug 2025

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"The communication with customer service was very smooth, the logistics speed was also fast, the product was consistent with the description."
— Verified Buyer, Aug 2025

"Fast delivery, competitive price, excellent support."
— Verified Buyer, Aug 2025

inventory_2 On Hard-to-Find Models & Price

"Good price for things hard to find!"
— Verified Buyer, Aug 2025

"Excellent quality, affordable price, worth recommending."
— Verified Buyer, Nov 2024

Join engineers and buyers from industrial automation, medical and marine industries — get your quotation within 24 hours.

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Comprehensive Score
4.8 out of 5
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J***********t
Sep 14, 2026
(5/5)
Happy with the LM12S401 CSTN display. Exactly the 12.1" Sharp panel we needed to repair our factory control unit. Plugged in and powered up straight away. Fast shipping.
P************k
Nov 10, 2025
(5/5)
My package arrived at the expected date (6 days after the purchase) and in good condition
O***********E
Sep 29, 2025
(5/5)
Very nice and sharp in the choice
L***********A
Sep 12, 2025
(5/5)
ALL AS PLANNED OK
a****k
Aug 28, 2025
(5/5)
Fast delivery, Comptetive price Excellent support
R********a
Aug 25, 2025
(5/5)
Perfect and easy.
R************z
Aug 21, 2025
(5/5)
Fast shipping, good communication, goods as described, will buy again.
G*************i
Aug 15, 2025
(5/5)
Good price for things hard to find!
y****m
Aug 15, 2025
(5/5)
Product arrived earlier than expected. Price was also very reasonable.
H*******e
Aug 12, 2025
(4/5)
The communication with customer service was very smooth, the logistics speed was also fast, the product was consistent with the description, and it was a good shopping experience.
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