The Yokogawa UT551 is part of the GREEN Series of digital indicating controllers, designed for single-loop process control such as temperature, pressure, or flow. It provides universal input, clear digital display, multiple alarm functions, and versatile control outputs. The model code “-13” specifies a particular configuration of input/output and alarm options.
Key Specifications Parameter Value / Description
Input (PV) Universal input: thermocouple, RTD, DC voltage, DC current.
Display PV display: 5-digit LED, red/green dual display; SP display: 3- or 5-digit; with status indicators.
Control Output Relay, current (e.g. 4-20 mA), or voltage pulse depending on model configuration.
Alarms Multiple alarm outputs with relay contacts; alarm action types available in ranges including 13.
Setpoints Single or multiple setpoints; setpoint switching depending on suffix.
Analog Output (Optional) Retransmission of PV or SP; typical accuracy ±0.1% of span.
Contact I/O Non-voltage contact or open collector inputs; relay contact outputs; number depends on suffix.
Output Ratings Relay contacts: typically rated up to 250 VAC or 30 VDC; analog outputs have defined load resistance limits.
Power Supply Depending on suffix, standard AC supply or DC supply options.
Control Functions PID control, heating/cooling control, position proportional control.
Safety Standards Conforms to IEC/EN61010-1, UL standards, CE compliance.