B&R Automation 4PP420.0571-75

Technical Dossier

Product Details And Specifications

B&R 4PP420 Series Technical Notes

The B&R 4PP420 Power Panel series is a line of integrated operator panel computers developed by Bernecker + Rainer Industrie-Elektronik GmbH (B&R), headquartered in Eggelsberg, Austria. These units combine HMI display, CPU processing, and I/O interface functions into a single panel-mount enclosure, targeting continuous-process industries where panel space, thermal stability, and long service life are primary engineering constraints.

The 4PP420 series has established a significant installed base in global heavy industry, including petrochemical refineries, chemical processing plants, nuclear auxiliary systems, offshore platform control rooms, and pulp-and-paper mill automation. Its compact form factor (5.7" to 15" display variants) and compatibility with B&R's Automation Studio development environment make it a standard specification item in DCS and SCADA retrofit projects where legacy panel replacement is required without full system redesign.

The Evolution of 4PP420 Architecture

The 4PP420 platform was introduced as part of B&R's second-generation Power Panel family, succeeding the earlier 4PP120 and 4PP220 lines. The architectural transition brought a shift from proprietary backplane communication to standardized USB and Ethernet interfaces, enabling integration with modern SCADA layers without protocol converters.

Early 4PP420 variants (circa 2005–2010) used CompactFlash storage and VGA-resolution resistive touchscreens. Mid-generation units introduced SDHC slots, higher-resolution displays (SVGA, XGA), and expanded RAM configurations up to 512 MB. Later revisions added multi-touch capacitive panels and SSD storage options, improving reliability in high-vibration environments such as compressor stations and marine applications.

Compatibility note: The 4PP420 series uses B&R's proprietary panel bus for add-on I/O modules. These modules are not cross-compatible with the 4PP045, 4PP065, or 4PP481 families. Engineers specifying replacement units must verify the panel bus revision (PB1 vs PB2) to ensure backward compatibility with existing I/O expansion racks.

The series entered its maturity/decline phase as B&R introduced the 4PP565 and 4PP581 families. For sites requiring long-term maintenance support without full system migration, lifecycle extension sourcing is the primary procurement strategy.

4PP420 Full Catalog & Functionalities (SKU List)

The following SKUs represent the documented production range of the B&R 4PP420 series, classified by primary function. All models listed are confirmed production variants.

Integrated Power Panel CPU / HMI Units

• 4PP420.0571-75: 5.7" QVGA TFT, 400 MHz CPU, 128 MB RAM, CompactFlash, resistive touch, panel bus
• 4PP420.0571-K04: 5.7" QVGA TFT, 400 MHz CPU, 128 MB RAM, keyboard navigation, no touchscreen
• 4PP420.0571-B5: 5.7" display, extended temperature range -20°C to +60°C, outdoor industrial variant
• 4PP420.0841-75: 8.4" SVGA TFT, 520 MHz CPU, 256 MB RAM, CompactFlash + SDHC, panel bus interface
• 4PP420.0841-K37: 8.4" SVGA TFT, 520 MHz CPU, 256 MB RAM, resistive touch, dual USB, Ethernet 10/100
• 4PP420.0841-B5: 8.4" display, conformal coating, extended temperature, marine/offshore specification
• 4PP420.1043-75: 10.4" XGA TFT, 520 MHz CPU, 256 MB RAM, resistive touch, 2× USB, 1× Ethernet
• 4PP420.1043-K37: 10.4" XGA TFT, keyboard/mouse interface variant, DVI output option
• 4PP420.1043-B5: 10.4" display, extended temperature, conformal coating, marine/offshore specification
• 4PP420.1043-K04: 10.4" display, 520 MHz CPU, 256 MB RAM, Windows CE 6.0, SDHC boot media
• 4PP420.1505-75: 15" XGA TFT, 520 MHz CPU, 512 MB RAM, resistive touch, panel bus, dual Ethernet
• 4PP420.1505-K37: 15" XGA TFT, keyboard navigation, RS232/RS485 serial ports, DIN rail mount option
• 4PP420.1505-B5: 15" display, extended temperature, stainless front bezel, food & beverage/pharma variant
• 4PP420.1505-K04: 15" display, 1 GHz CPU, 512 MB RAM, SDHC + USB boot, Windows CE 6.0
• 4PP420.1505-K05: 15" display, 1 GHz CPU, 512 MB RAM, Windows Embedded Standard 2009, SSD storage

Panel Bus I/O Expansion & Communication Modules

• 4PP420.BP01-1: Panel bus backplane, 1-slot expansion, DI/DO module carrier for 4PP420 base units
• 4PP420.BP04-1: Panel bus backplane, 4-slot expansion, supports mixed DI/DO/AI module configurations
• 4PP420.IF01-1: Panel bus interface, PROFIBUS DP slave adapter, 12 Mbit/s, for 4PP420 I/O expansion
• 4PP420.IF02-1: Panel bus interface, CANopen adapter, for integration with B&R X20 and X67 I/O nodes

Sourcing Hard-to-Find & Obsolete 4PP420 Parts

B&R has progressively transitioned the 4PP420 series toward end-of-life status, with several early variants (5.7" and 8.4" display models) formally discontinued. Replacement recommendations from B&R point to the 4PP565 and 4PP581 Power Panel families, which require new Automation Studio projects and are not drop-in substitutes at the hardware level.

DriveKNMS supports lifecycle extension for the following discontinued 4PP420 configurations: 4PP420.0571-75, 4PP420.0571-K04, 4PP420.0841-75, 4PP420.0841-K37, and 4PP420.1043-75. Customers requiring long-term supply agreements (LTA) for maintenance spares are invited to contact the procurement team directly.

Quality Control for the 4PP420 Range

The 4PP420 series presents specific test challenges due to its integrated architecture: the display controller, CPU board, panel bus interface, and power supply share a single PCB assembly in most variants. Standard bench power-on testing is insufficient to validate full functionality.

DriveKNMS applies the following test protocol to all 4PP420 units:

• Power-on and POST verification: Unit powered via rated 24 VDC supply; boot sequence and firmware POST completion confirmed.
• Display calibration check: Touchscreen linearity and dead-zone mapping tested across full active display area using calibration grid.
• Panel bus communication test: 4PP420.BP04-1 backplane connected; I/O module enumeration verified via Automation Studio diagnostic tools.
• Ethernet and USB port validation: All external interface ports tested for signal integrity and correct enumeration.
• Storage media verification: CompactFlash and SDHC slots tested with known-good media; read/write speeds benchmarked against factory specification.
• Thermal soak: Units operated at rated ambient temperature for minimum 4 hours to screen for latent thermal failures in capacitors and voltage regulators.