Siemens av2123-2ga03-0ax0

By Abdullah Zahid
12 min read
Siemens 6AV2123-2GA03-0AX0 KTP700 Basic DP 7-inch TFT HMI panel for PROFIBUS DP industrial control systems

Siemens 6AV2123-2GA03-0AX0 SIMATIC HMI KTP700 Basic DP, Basic Panel, Key/touch operation, 7" TFT display — Specifications, Pricing and Selection Guide

Controls engineers replacing a failed panel or specifying an HMI for a new PROFIBUS DP application will find the Siemens 6AV2123-2GA03-0AX0 appearing near the top of every short list — and for good reason. It is a 7-inch TFT touchscreen and key-operated HMI panel running on 24 VDC, built around a single RS-485 PROFIBUS DP interface, and rated IP65 on the front face. The real question at the point of purchase is whether this specific model code — with its PROFIBUS-only connectivity and analog-resistive touch technology — is the correct fit for your cabinet, your network, and your project timeline.

If you have already confirmed this is the right part, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Buy the Siemens 6AV2123-2GA03-0AX0 — and Who Shouldn't

The Siemens 6AV2123-2GA03-0AX0 is the correct choice for engineers who need a compact, cost-effective operator panel on an existing PROFIBUS DP network and can work within its physical and software constraints.

  • Your control network runs PROFIBUS DP — the panel has one RS-485 PROFIBUS interface and no Ethernet port
  • Your cabinet cutout is or can be made to 198 mm (W) x 142 mm (H) — non-negotiable for fit
  • A regulated 24 VDC supply between 19.2 V and 28.8 VDC is available in the cabinet
  • Your engineering PC runs WinCC Basic V13 or later (or STEP 7 Basic V13 or later) for project creation and download
  • The installation angle does not exceed 35 degrees — tilted mounting beyond this requires temperature derating
  • Front IP65 protection is sufficient — rear connections are IP20 and not wash-down rated

If your project requires Ethernet or Industrial Ethernet connectivity, advanced data logging, recipe management, or a built-in web server, you will need the KTP700 Basic PN variant or a larger panel in the KTP family. If your display footprint requirement is smaller, look at the KTP400 series instead.

On this page:

What the Siemens 6AV2123-2GA03-0AX0 Actually Does on the Plant Floor

The Siemens 6AV2123-2GA03-0AX0 is the visual and tactile gateway between an operator and the control system behind the cabinet door. It gives operators real-time access to process values, alarm states, and parameter inputs — displaying them on an 800 x 480 pixel, 65536-color TFT panel that is bright enough for most factory floor lighting conditions. The ARM processor and 10 Mbyte user data memory (Flash and RAM combined) are sized for straightforward operator visualization: live data display, alarm acknowledgment, setpoint entry, and basic diagnostics. This is not a data historian or a web-connected dashboard — it is a field-proven operator station for applications where a fast, reliable, single-protocol HMI is what the project calls for.

The combination of an analog-resistive touchscreen and 8 programmable physical function keys makes it usable even when screen interaction needs to be supplemented by tactile confirmation. The hardware clock retains time for up to 6 weeks on its backup battery, keeping alarm timestamps accurate through power interruptions. WinCC Basic, the configuration environment, is provided at no additional licensing cost — an important factor in budget-constrained retrofit and small-machine OEM projects.

Where the KTP700 Basic DP Sits in a Typical Control System

The 6AV2123-2GA03-0AX0 sits at the human interface layer of the control architecture, downstream of the PLC and upstream of the operator — translating PLC data into readable screens and converting operator input into process commands over PROFIBUS DP.

  • Engineering workstation running WinCC Basic V13+ creates and downloads the HMI project to the panel via USB
  • 24 VDC regulated cabinet power supply feeds the KTP700 Basic DP through a dedicated fused or MCB-protected circuit
  • The KTP700 connects to the PROFIBUS DP network via its RS-485 interface — daisy-chained with the master PLC and any other DP slave devices on the segment
  • The PLC (S7-1200, S7-300, S7-1500, or compatible PROFIBUS master) exchanges process data with the KTP700 as a configured DP slave at its assigned station address
  • Operators interact with the 7-inch TFT panel using bare-finger touch or the physical function keys to acknowledge alarms, adjust setpoints, and monitor live process values

Industries and Applications Where This Panel Gets Specified

Discrete manufacturing plants — particularly automotive sub-assembly, machine tool cells, and robotic cell supervision stations — use the 6AV2123-2GA03-0AX0 as the primary operator station where production line status and alarm acknowledgment are the core functions. The 7-inch display is large enough to show multiple live values and alarm banners simultaneously without requiring the operator to page through screens.

Process manufacturing environments including beverage bottling, food packaging, and pharmaceutical batch control benefit from the IP65 front protection and the ability to handle ambient humidity up to 90% without condensation. Parameter adjustment and recipe selection on batch mixing or extrusion lines are well-suited to this panel's combination of touch input and physical function keys.

Water and wastewater treatment facilities running legacy PROFIBUS DP infrastructure frequently specify this panel for remote equipment diagnostics and maintenance call-out triggers at distributed pump stations and valve control points. The panel's operational temperature range of 0–50°C (vertical installation) covers the seasonal variation typical of outdoor-adjacent or unheated plant rooms.

OEM machinery builders and custom automation integrators working on cost-sensitive projects find the combination of no additional WinCC Basic licensing cost and compact 198 mm x 142 mm cutout dimensions easy to accommodate in standard control enclosures without significant cabinet redesign.

Application Typical Deployment
Automotive sub-assembly line Production status display and alarm acknowledgment at robot cell operator station
Batch mixing / extrusion process Setpoint entry and recipe selection panel on PROFIBUS DP segment with S7-300 master
Beverage bottling / food packaging IP65-rated operator interface in humid, washable cabinet enclosure
Water / wastewater pump station Remote diagnostics and equipment status display on legacy PROFIBUS network
Legacy PLC retrofit (2000s–2010s vintage) Modern touchscreen usability layer added over existing PROFIBUS DP infrastructure
Cost-sensitive OEM machine builder Entry-level HMI with free WinCC Basic configuration to reduce project licensing spend

Key Specifications Engineers Use to Make the Purchase Decision

Specification Value
Display 7-inch TFT widescreen, LED backlit, 800 x 480 pixels, 65536 colors
Touchscreen Technology Analog-resistive (bare finger or stylus; not glove-compatible)
Physical Keys 8 programmable function keys
Supply Voltage 24 VDC nominal; permissible range 19.2–28.8 VDC
Power Consumption 5.5 W typical; 230 mA rated current; 0.2 A²·s inrush
Communication Interface 1x RS-485 PROFIBUS DP; 1x RS-422 (shared); 1x USB up to 16 GB
Supported Protocols PROFIBUS DP, MPI, MODBUS
Mounting Cutout 198 mm (W) x 142 mm (H); housing 214 mm x 158 mm x 39 mm depth
IP / NEMA Rating IP65 front / IP20 rear; NEMA Type 4 front
Operating Temperature 0–50°C vertical; 0–40°C tilted; storage -20°C to +60°C

Full technical specifications are available on the product page at LeadTime.ca.

KTP700 Basic DP vs. KTP400, KTP1000, and Competing 7-Inch Panels

Model Display Size Key Feature Best For Protocol
KTP400 Mobile 4-inch Portable, wireless option Handheld operator with movement requirements Ethernet, PROFIBUS
KTP700 Basic DP (6AV2123-2GA03-0AX0) 7-inch Touch + 8 keys, compact, PROFIBUS-native Legacy PROFIBUS DP systems, cost-sensitive projects PROFIBUS DP, MPI, MODBUS
KTP1000 10-inch Large display, advanced multi-page graphics Complex visualization with many operator screens PROFIBUS, Ethernet variants
Danfoss Easyview EV-7W 7-inch Ethernet connectivity, capacitive touch Non-Siemens ecosystems requiring Ethernet Ethernet, Modbus
Mitsubishi GT13 Series 7-inch Capacitive touch, different connector system Mitsubishi PLC infrastructure Ethernet, CC-Link

If your architecture runs PROFIBUS DP with a Siemens S7-series PLC master and your project does not require Ethernet connectivity or advanced visualization features, the 6AV2123-2GA03-0AX0 is the correct and most cost-effective choice — check current availability at LeadTime.ca.

Expert Verdict: Strengths, Honest Limits, and Procurement Reality

The Siemens 6AV2123-2GA03-0AX0 earns its place on most PROFIBUS DP system short lists for three straightforward reasons: it integrates natively with Siemens S7-1200, S7-300, and S7-1500 PLCs without any gateway or protocol conversion; WinCC Basic is provided at no additional licensing cost; and the 20,000-hour backlighting MTBF — equivalent to more than 4 years at a 16-hour shift duty cycle — gives it genuine industrial durability credentials. For plant engineers managing legacy PROFIBUS infrastructure or OEM builders keeping project cost down, these are not minor advantages. The SIMATIC HMI family has been deployed in over 10 million industrial control installations globally, which means spare parts and technical support are not abstract promises — they are demonstrably available.

The honest limits are equally straightforward. This panel has no Ethernet port. If your project requires networked HMI access, remote monitoring, or integration with an Ethernet-only PLC network, the 6AV2123-2GA03-0AX0 is the wrong variant — full stop. The analog-resistive touchscreen is a real operational constraint in glove-heavy environments: bare-finger or stylus contact is required for consistent registration, and wet fingers also cause inconsistency. The rear enclosure is IP20 only, so it cannot be used in applications where the cabinet interior is exposed to wash-down or heavy condensation. These are not flaws for the applications it is designed for — they are selection criteria that must be confirmed before ordering.

On procurement: the 6AV2123-2GA03-0AX0 is a standard stocked item in the global industrial automation supply chain, with typical lead times in the 2–4 week range for new units. Refurbished units are available from specialty MRO vendors and generally price at 40–60% of new. If you are replacing a failed panel urgently, the refurbished channel is worth checking for same-day or next-business-day availability. Volume pricing and bundling with associated PROFIBUS cabling and 24 VDC supply components can reduce total project cost — that conversation is worth having with your distributor before the purchase order is raised. If this matches your system requirements, view current stock and pricing at LeadTime.ca.

For volume pricing or to confirm lead time before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

Wiring and Installation: What to Verify Before You Mount It

  • Confirm cabinet cutout is exactly 198 mm (W) x 142 mm (H) and that at least 39 mm of depth is available behind the panel face for the housing body
  • Install a miniature circuit breaker or fused disconnect rated for the 230 mA nominal draw plus safety margin between the 24 VDC cabinet supply and the KTP700 power terminals — the 0.2 A²·s inrush specification must be accommodated in the protection device selection
  • Use twisted-pair shielded cable for the PROFIBUS RS-485 connection; install 120-ohm termination resistors at both ends of the PROFIBUS segment; verify total cable length is within the baud-rate-dependent limit (1200 m at 9.6 kbaud down to 100 m at 12 Mbaud)
  • If mounting at an angle, stay within the 35-degree maximum — tilted installations above horizontal require operating temperature to be derated to 0–40°C, and portrait-orientation tilted installations limit to 0–35°C
  • Connect the engineering PC via USB for project download; verify the USB cable quality and confirm the WinCC Basic V13 or later project is compiled and tested before initiating the transfer

Configuration Software and Compatible System Components

The 6AV2123-2GA03-0AX0 operates within the Siemens SIMATIC automation ecosystem. The following software and components are directly relevant to commissioning and integrating this panel:

  • WinCC Basic V13 or later — included at no additional licensing cost; used to create, configure, and download HMI projects to the KTP700 Basic DP
  • STEP 7 Basic V13 or later — alternative project environment supporting the same panel configuration and download workflow
  • Siemens S7-1200 PLC — native PROFIBUS DP master integration, no gateway required
  • Siemens S7-300 PLC — fully compatible legacy PROFIBUS DP master; common in retrofit applications
  • Siemens S7-1500 PLC — compatible with PROFIBUS DP via CM interface modules where required
  • PROFIBUS-certified RS-485 twisted-pair shielded cable and Sub-D or M12 connectors with integrated 120-ohm termination — required for reliable network operation
  • Dedicated 24 VDC regulated panel power supply — must maintain 19.2–28.8 VDC under load; sizing should account for the 230 mA rated current draw

Wrong-Part Prevention: Verify These Before You Order

Before submitting a purchase order for the Siemens 6AV2123-2GA03-0AX0, run through this checklist — each item has caused incorrect orders or failed installations in real projects:

  1. Confirm PROFIBUS DP is your required protocol (not Ethernet or standalone Modbus-only systems)
  2. Verify control cabinet cutout dimensions accommodate 198 mm (width) x 142 mm (height) mounting opening
  3. Check that 24 VDC supply is available and stable between 19.2-28.8 V (peak inrush current 0.2 A²·s)
  4. Ensure WinCC Basic V13 or later is installed for configuration and project creation
  5. Confirm mounting angle does not exceed 35 degrees (tilted installation may require temperature derating)
  6. Verify no water immersion or pressure washing (IP65 front only; rear is IP20 and not protected)
  7. Check that configuration software version (WinCC/STEP 7) matches or is newer than factory default (V13+)

If any of these checks raises a conflict with your project requirements, contact the LeadTime.ca team to identify the correct variant before ordering — or review the full product details at LeadTime.ca to cross-reference against your application.

Frequently Asked Questions

Can the 6AV2123-2GA03-0AX0 connect to a Siemens S7-1200 PLC without an additional gateway module?

Yes. The S7-1200 supports PROFIBUS DP master operation, and the 6AV2123-2GA03-0AX0 operates as a PROFIBUS DP slave on the same segment. No protocol gateway or converter is required. The connection is configured directly within the WinCC Basic or STEP 7 Basic project environment.

What happens if the mounting angle exceeds 35 degrees?

Siemens specifies that the maximum mounting angle without external cooling or temperature derating is 35 degrees from horizontal. Beyond this angle, the thermal management of the panel is compromised and the operating temperature ceiling drops — to 0–40°C for standard tilted mounting and 0–35°C for portrait-orientation tilted installation. Exceeding the specified angle without derating the ambient temperature risks premature failure of the display backlight, which has a rated MTBF of 20,000 hours at 25°C.

Is WinCC Basic software included in the purchase price, or is it a separate license?

WinCC Basic is provided at no additional licensing cost with the panel purchase. It is included within the TIA Portal Basic package alongside STEP 7 Basic V13 and later versions. This eliminates the separate software licensing expense that is common with mid-range and advanced HMI platforms, making the 6AV2123-2GA03-0AX0 a cost-effective choice for projects where advanced HMI software licensing would otherwise be prohibitive.

Will this panel work in a wash-down or high-humidity food processing environment?

The front face of the 6AV2123-2GA03-0AX0 carries an IP65 rating, providing protection against dust and directed water spray. It supports operating humidity up to 90% without condensation and handles the temperature range of 0–50°C in vertical installation. However, the rear connections are rated IP20 only — the panel is not suitable for full immersion or high-pressure rear wash-down. If the cabinet interior will be exposed to wash-down, a sealed enclosure protecting the rear is required.

Can the analog-resistive touchscreen be used with industrial gloves?

No — analog-resistive technology requires direct contact pressure from a bare finger or a compatible stylus to register input reliably. Thick gloves, latex gloves, and wet fingers will produce inconsistent or no response. For environments with mandatory glove use, a capacitive touchscreen HMI or a physical pushbutton interface should be specified instead.

What is the realistic service life for the backlight, and how difficult is replacement?

The rated backlighting MTBF is 20,000 hours at 25°C. At a 16-hour per day operational shift pattern, this corresponds to over 4 years of median service life before backlight replacement becomes likely. Backlighting modules are available as spare parts through Siemens authorized service channels and authorized MRO distributors. Replacement typically requires a trained technician and documented service procedure from Siemens technical support.

Why Source the 6AV2123-2GA03-0AX0 Through LeadTime.ca

  • LeadTime.ca ships worldwide — no geographic restriction on orders regardless of project location
  • Stocks and sources hard-to-find industrial automation parts including both new and refurbished KTP700 Basic DP panels
  • Volume pricing available for multi-unit OEM or plant-wide deployments — contact the team before raising your PO
  • Fast response on lead time confirmation and sourcing alternatives when standard stock is constrained
  • Knowledgeable team familiar with SIMATIC HMI product family — can assist with variant selection if your requirements are on the boundary between models

At-a-Glance Summary

  • 7-inch TFT widescreen display, 800 x 480 pixels, 65536 colors, LED backlit with 20,000-hour MTBF at 25°C
  • Analog-resistive touchscreen plus 8 programmable function keys — bare finger or stylus operation required
  • 24 VDC nominal supply, 19.2–28.8 VDC permissible range, 5.5 W typical consumption, 230 mA rated current
  • Single RS-485 PROFIBUS DP interface; also supports MPI and MODBUS; no Ethernet port
  • Mounting cutout 198 mm (W) x 142 mm (H); housing 214 mm x 158 mm x 39 mm depth; weight 800 g
  • IP65 front / IP20 rear; NEMA Type 4 front; operating temperature 0–50°C vertical, 0–40°C tilted
  • 10 Mbyte user data memory (Flash and RAM); hardware real-time clock with 6-week battery backup
  • WinCC Basic V13 or later required for configuration; included at no additional licensing cost
  • Certifications: CE, cULus, RCM, KC
  • Native integration with Siemens S7-1200, S7-300, and S7-1500 PLC platforms over PROFIBUS DP