The Yokogawa SR1150A02 is a Single Channel, High-Speed Analog Voltage/Current Input Safety Relay designed for use with Yokogawa's ProSafe-RS Safety Instrumented System (SIS).
This module is a critical component located in a SR1000 Series Safety Remote I/O node. Its primary function is to interface with field instruments (like 4-20mA transmitters or 0-5V sensors), read their analog signals with high integrity, and transmit this data to the ProSafe-RS safety controllers for processing in safety-critical loops (SIL 2/SIL 3).
