Adding communications to the YS1500/YS1700 controllers

I purchased a YS1500/YS1700 without communications and now realize I need serial and/or Ethernet capabilities.  Is this possible?

It is not possible to add the Ethernet (/A34) option to the YS1500/YS1700 controllers.  However it is possible to add RS-485 (/A31) or DCS-LCS (/A32) communications.  The controller has to be returned to Yokogawa for this retrofit. Contact our service department at 800-524-7378 for more information.

Related Products & Solutions


The YS1500 Indicating Controller incorporates fundamental control functions required for PID control. Necessary functions can be selected in accordance with the user's purpose.


The YS1700 Programmable Indicating Controller can be tailored for various applications by running a user program, and offers high reliability thanks to Yokogawa's proprietary technology, user friendliness, and expandability.

Control System

Yokogawa offers multiple automation and control strategies, architectures, and solutions for every application size and complexity.

Controllers & Indicators

Our complete product line supports every type of control application. Models with Active Color PV display and Ethernet connectivity are now available.

Single Loop Controllers

Single loop controllers receive temperature, flow rate, pressure, and other types of measurement readings from sensors and send corresponding instructions to control elements such as valves in order to maintain these values within a desired range.