Keysight / Agilent / HP E1415A Algorithmic Closed Loop Controller

The Keysight/Agilent/HP E1415A is a VXIbus Algorithmic Closed-Loop Controller that executes complex real-time control algorithms on a dedicated onboard Digital Signal Processor. This C-size, single-slot module eliminates dependency on host computer processing for primary control functions, delivering deterministic response times essential for precision closed-loop applications. It bridges standard PID control and fully custom algorithm implementations, supporting up to 32 independent control loops with user-defined logic written in ANSI C subset programming. ## Technical Specifications • Module Type: VXIbus Algorithmic Closed-Loop Controller, C-size, 1-slot • Processing: Digital Signal Processor (DSP) for real-time algorithm execution • Control Loops: Up to 32 independent closed-loop algorithms • Algorithm Language: ANSI C subset with user-defined functions • I/O Channels: 64 configurable channels in 8-channel groups • Supported I/O Types: Analog Input, Analog Output, Digital I/O • Signal Conditioning Plug-on Cards (SCPs): Up to 8 optional SCP slots for specialized I/O • Update Rate: Up to 2.5 kHz; achievable up to 1000 Hz per loop for simple PID calculations with 8 loops • SCP Example: E1502A 8-Channel Low-Pass Filter SCP - 7 Hz cutoff with over-voltage protection and open transducer detection; self-calibrated on demand ## Key Features • Deterministic timing with no drift or jitter in integral and derivative calculations • Input measurement, calculation, and output completion between scan triggers • Built-in PID algorithms; user-specified control algorithms supported • Up to 32 user-defined functions per module • Transcendental and non-linear functions via piece-wise linear interpolated lookup tables for optimized execution speed • Self-calibrating analog input and output SCPs • Minimal host computer interaction required for operation ## Data Acquisition & Control Logic High-speed multi-channel capture of analog, digital, and frequency-based signals within a single module. Algorithms execute closed-loop control by acquiring input data, performing real-time calculations, and generating output commands with deterministic latency. ## Compatibility & Integration Designed for VXIbus backplane systems. Optional Signal Conditioning Plug-on Cards extend I/O capabilities and provide signal conditioning for specialized measurement and control applications.