Yokogawa YS170 Style S3 Suffix 011 Single-Loop Controller
The Yokogawa YS170 is a discontinued, high-reliability single-loop programmable indicating controller. The designation outlines key configuration variables:
- YS170: Model number for the programmable version (featuring text-based programming, up to 400 sequence steps, and capable of controlling two independent loops).
- Style S3: Indicates the hardware generation of the controller.
- Suffix -011: Represents the general-purpose, 100V power supply version that outputs a 4 - 20 mA DC signal.
These controllers were commonly used as backups for Distributed Control Systems (DCS) in heavy industries like chemicals, water, and power.
Because the YS170 has been discontinued, Yokogawa has replaced it with the YS1700 Programmable Indicating Controller, which includes a full-dot color LCD and function-block programming