Keysight / Agilent / HP 7550B Plus Plotter

The Keysight/Agilent/HP 7550B Plus is an 8-pen flatbed plotter engineered for precision hardcopy output across engineering, scientific, and business applications. It combines automatic pen changing with HP-GL command emulation to deliver accurate, repeatable plots on media ranging from standard paper to polyester film. The curved-line generator ensures smooth arcs and circles, while automatic sheet feeding enables unattended operation.

Technical Specifications

• Plotting Method: 8-pen flatbed with automatic pen changing and capping


• Plotting Speed: 120 cm/s


• Resolution: 0.025 mm minimum addressable move


• Maximum Plottable Area: 9.97 × 7.8 inches (A), 16.12 × 9.97 inches (B), A4 (271 × 190 mm), A3 (399.25 × 271 mm)


• Media Support: Standard paper, vellum, double-matte polyester film, transparency film; thickness 0.05 mm to 0.1 mm


• Pen Carousel: 8-pen capacity; supports fiber-tip transparency, fiber-tip paper, roller-ball, and drafting pens


• Character Sets: 20 font sets


• Power Consumption: 105 W maximum


• Input Voltage: 100, 120, 220, 240 V AC (−10%, +5% tolerance)


• Frequency: 48–66 Hz


• Dimensions: 215 × 670 × 432 mm minimum (A4/A, no catcher); 215 × 670 × 896 mm maximum (A3/B, with catcher)


• Net Weight: 17.3 kg

Key Features

• Automatic pen sorting and grouping with intelligent carousel management


• Letter/A4 loading tray (up to 150 sheets) with automatic cut-sheet feed


• Manual single-sheet feeder for 11 × 17 and A3 media


• LCD control panel with status, error, and configuration messaging


• Dual RS-232-C connectors (COMPUTER and TERMINAL)


• X-ON/X-OFF serial flow control


• Optional Centronics parallel (Option 006) and RS-422-A (Option 005) interfaces

Typical Applications Detailed technical drawings, CAD plots, scientific graphs, engineering schematics, and business presentation graphics requiring multicolor hardcopy with precise line quality and consistent repeatability.

Compatibility & Integration Standard HP-IB (IEEE 488) and RS-232-C serial interfaces ensure direct connectivity to laboratory instruments and host computers. HP-GL command emulation provides broad software compatibility across CAD, scientific plotting, and data visualization platforms.