PDP-14 Programmable Controller Product Summary

This product summary document details the features, components, and operation of the Digital Equipment Corporation (DEC) PDP-14, a programmable solid-state industrial controller. Designed to replace traditional relay control systems, the PDP-14 offers enhanced reliability, reduced space requirements, and lower long-term maintenance costs.

Key features and components include:

• System Architecture: The PDP-14 consists of Input (I) boxes, Output (O) boxes, and the main Control Unit. The system uses solid-state logic to manage industrial processes.
• Read-Only Memory (ROM): The core of the system is a user-defined, non-volatile ROM, which consists of a "braid" of wires woven into a transformer matrix. This "braid" acts as the hard-wired instructions for the controller.
• Programming: Users can program the PDP-14 by defining control logic through Boolean equations. These equations are translated into machine code using the BOOL-14 program on a PDP-8 computer.
• Simulation and Maintenance: The system includes tools such as SIM-14 for program simulation and debugging, and TEST-14 for hardware diagnostics. The document outlines the procedure for system configuration, hardware installation in NEMA 12 enclosures, and maintenance.
• Expandability: The PDP-14 supports up to 512 inputs and 256 outputs, while the smaller PDP-14/L version is more limited in capacity and expandability. The document also details optional accessories, including solid-state timers, retentive memories, and computer interfaces for system monitoring.