Pro-face GP570 Series Operator Panels GP570-TC11

Technical Dossier

Product Details And Specifications

Pro-face GP570 Series Technical Notes

The Pro-face GP570 series is a line of industrial Human-Machine Interface (HMI) operator panels manufactured by Digital Electronics Corporation (Pro-face), Japan. These units have been deployed extensively across global heavy industries including petrochemical plants, nuclear power facilities, oil refineries, and continuous-process manufacturing environments. The GP570 series occupies the mid-range tier of the Pro-face GP product hierarchy, offering a balance between display resolution, I/O connectivity, and panel-mount form factor that made it a standard specification in DCS and PLC integration projects throughout the 1990s and early 2000s. Its installed base remains significant, with active units still operating in facilities where full system replacement is cost-prohibitive.

The Evolution of GP570 Architecture

The GP570 series was introduced as part of Pro-face's second-generation GP platform, succeeding the GP470 line. It introduced a 5.7-inch STN LCD display as the standard panel size, with a resolution of 320×240 pixels (QVGA). Communication architecture relied on RS-232C and RS-422/485 serial interfaces, enabling direct connection to PLCs from Mitsubishi, Omron, Siemens, Allen-Bradley, and Yokogawa via dedicated protocol drivers loaded from EPROM or flash memory.

Early GP570 variants used proprietary GP-PRO/PBIII software for screen creation, running on Windows 3.1 and Windows 95 hosts. Later firmware revisions extended compatibility to Windows 98 and NT 4.0 environments. The series does not support Ethernet natively; Ethernet connectivity requires an external communication adapter or a successor unit from the GP2000 or GP3000 series. This architectural limitation is the primary driver of obsolescence in modern networked SCADA environments.

The GP570 series entered the mature/end-of-life phase in the mid-2000s when Pro-face transitioned its product line to the GP2000 and subsequently GP3000 platforms. Replacement units are no longer manufactured. Long-term maintenance support is now the primary use case for GP570 procurement globally.

GP570 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the Pro-face GP570 series. Each unit is a standalone HMI operator panel. Functional classifications are based on display type, backlight technology, and communication port configuration.

STN Monochrome / Color Display Variants:

• GP570-TC11: 5.7-inch color STN LCD, RS-232C + RS-422 ports, panel-mount, 24VDC input
• GP570-TC41: 5.7-inch color STN LCD, dual RS-232C ports, extended temperature range variant
• GP570-SC11: 5.7-inch monochrome STN LCD, single RS-232C port, standard panel-mount
• GP570-SC41: 5.7-inch monochrome STN LCD, dual serial ports, NEMA 4/IP65 front panel
• GP570-BG11: 5.7-inch blue/gray STN display, RS-422/485 primary interface, DIN-rail compatible
• GP570-BG41: 5.7-inch blue/gray STN display, extended I/O configuration, 24VDC

EL (Electroluminescent) Display Variants:

• GP570-EG11: 5.7-inch EL display, high-contrast monochrome, RS-232C port, suitable for low-light environments
• GP570-EG41: 5.7-inch EL display, dual serial ports, extended temperature operation

Communication & Interface Variants:

• GP570-TC11-24V: Color STN variant with explicit 24VDC power supply labeling, RS-232C + RS-422
• GP570-SC11-24V: Monochrome STN, 24VDC, single RS-232C, standard mounting
• GP570-TC41-24V: Color STN, 24VDC, dual RS-232C, extended temperature

Replacement & Accessory Units:

• GP570-CFL-10: CCFL backlight replacement unit for GP570 color STN panels
• GP570-PFKB03: External function key expansion unit for GP570 series
• CA3-ADPTRM-01: RS-422/485 termination adapter compatible with GP570 communication ports
• CA3-ADPUSB-01: USB-to-serial transfer adapter for GP-PRO/PBIII screen data upload to GP570
• GP070-MD11: Memory loader unit for offline screen data transfer to GP570 series panels

Quality Control for the GP570 Range

Each GP570 unit processed by DriveKNMS undergoes a structured inspection and functional verification protocol prior to dispatch. The procedure addresses the specific failure modes documented for this series:

• Display verification: Full-screen pixel mapping to identify dead pixels, backlight degradation, and STN/EL panel delamination. CCFL backlight luminance is measured against OEM specification (minimum 150 cd/m²).
• Power supply integrity: Input voltage tolerance tested across 20.4–28.8VDC range. Inrush current and ripple measured at startup.
• Serial communication port test: RS-232C and RS-422/485 ports verified using loopback and protocol handshake tests. Baud rate stability confirmed at 9600, 19200, and 38400 bps.
• Screen data integrity: Internal flash/EPROM read-back performed to confirm screen project data is intact and uncorrupted.
• Touchscreen calibration: Resistive touch matrix calibrated across 9-point grid. Response linearity verified.
• Environmental inspection: Capacitor ESR measurement on power board. Connector pin inspection for oxidation and mechanical wear.

Units that do not pass all checkpoints are quarantined and listed separately as parts-only or for repair evaluation.