Yokogawa AAP135-S50/K4A00 Isolated Pulse Frequency Module

Product Description

High-Speed Pulse Frequency Acquisition

The Yokogawa AAP135-S50/K4A00 (Model AAP135) is a specialized high-speed Pulse Input Module designed for the FIO (Field I/O) subsystem of Yokogawa’s CENTUM VP and CS 3000 Distributed Control Systems. Engineered for precision frequency and pulse count acquisition, this module interfaces with field devices such as flow meters, tachometers, and encoders. It supports an extensive frequency range from 0 to 10 kHz, converting physical pulses into digital values for real-time process monitoring and totalization.

Isolated Multi-Channel Architecture

The AAP135-S50 features 8 fully isolated channels, providing superior protection against ground loops and common-mode noise in complex industrial environments. This configuration is essential for maintaining signal integrity in power plants and petrochemical refineries where electrical interference is prevalent. This specific "K4A00" variant comes factory-equipped with the ATK4A-00 KS Cable Interface Adapter, which consolidates the I/O signals into a standardized interface for high-density terminal board connections using KS cables.

Detailed Technical Specifications

The following table details the electrical and mechanical performance of the AAP135-S50/K4A00.