Keysight / Agilent / HP E1421-66501 VXI 6-Slot Backplane Module for E1421B

The Keysight E1421-66501 is a VXI 6-slot backplane module engineered for the E1421B C-size mainframe. This module delivers the essential backplane infrastructure required for a 6-slot VXI system, establishing connectivity and signal integrity across installed modules. It complies fully with VXIbus specifications and integrates proven thermal management and serviceability features. ## Technical Specifications • Model: E1421-66501 • Product Type: VXI Backplane Module • Form Factor: C-size • Slot Count: 6 slots • Mainframe Compatibility: E1421B VXI mainframe • VXIbus Compliance: Meets VXIbus Specification standard • Power Input: 100–240 VAC ## Key Features Connectivity Architecture The backplane utilizes dual VXIbus connector pairs for comprehensive signal distribution. The P1 connector carries the 16-bit data transfer bus, 24-bit addressing, and power voltages (+5V, +/–12V). The P2 connector expands the data interface to 32-bit, adds a 10 MHz clock bus, analog sumbus, TTL and ECL trigger buses, and supplies additional power rails (–5.2V, –2V, +/–24V). Insertion & Extraction Injector surface rails enable the QUIC system for fast, tool-free module insertion and extraction, reducing setup time and mechanical stress on connectors. Thermal Management The Pressurized Air Channel cooling system delivers clean, uniform airflow directed through the right side and exhausted through the left, maintaining optimal operating temperatures across all module slots. Power Supply Access Rear-panel power input simplifies power supply serviceability and reduces mainframe downtime during maintenance. ## Typical Applications This backplane module suits cost-effective VXI configurations requiring 6 slots without the footprint of larger mainframes. Ideal for portable and rack-mount test systems, measurement platforms, and signal processing applications in laboratory and production environments. ## Compatibility & Integration The E1421-66501 functions as an integral component of the E1421B mainframe ecosystem, managing VXIbus device interconnection, power distribution, and thermal control. Its compact C-size form factor and modular design enable flexible instrument configurations while maintaining full compliance with VXIbus standards for cross-vendor module interoperability.