UT150-RR/RS

The Yokogawa UT150-RR/RS is a 1/16 DIN motorized valve controller designed to regulate valve position through relay contact outputs. The -RR output configuration provides relay contacts for motorized valve operation, while the /RS option adds a communication function. It belongs to Yokogawa's UT100 series of compact controllers and is intended for applications requiring control of motor-operated valves.

Valve Control Function

The UT150 motorized valve controller uses two relay contact outputs to provide directional control of a motor-operated valve or actuator. The control logic distinguishes between the direct and reverse motor commands, allowing the actuator to move in the required direction in response to the controller's process-control action.

The controller accepts a process variable (PV) input and provides setpoint-based control. Its universal input supports thermocouples, RTDs, and DC voltage signals. This allows the controller to receive feedback from different types of process sensors without restricting the input to a single sensor category.

Communication Interface

The /RS option provides an RS-485 communication interface for exchanging controller data with external equipment. The UT100 series supports the following communication protocols:

• MODBUS
• Yokogawa PC-link
• Ladder communication protocol

The RS-485 interface supports integration with supervisory equipment and controller networks. Communication wiring uses separate positive, negative, and signal-ground terminals.

Model Configuration

The ordering code identifies the main hardware configuration:

• UT150: 1/16 DIN motorized valve controller.
• -RR: Two relay contact outputs for motorized valve control.
• /RS: Communication function.

The /RS option should not be confused with the relay output configuration. It adds a communication interface rather than changing the motor control output type.

Technical Specifications

Parameter	Specification
Model	UT150-RR/RS
Brand	Yokogawa
Product Type	Motorized Valve Controller
Series	UT100 Series
Panel Size	1/16 DIN
Dimensions	48 x 48 x 100 mm
Control Output	Two relay contact outputs
Process Variable Input	Universal input
Supported Input Types	Thermocouples, RTDs, DC mV and DC V
Number of Setpoints	2
Control Scan Period	500 ms
Communication Interface	RS-485
Communication Protocols	MODBUS, PC-link, Ladder
Power Supply	100-240 VAC, 8 VA; optional 24 VAC/DC, 3 W
Ambient Temperature	0 to 50 deg C
Ambient Humidity	20 to 90% RH, non-condensing
Front Panel Protection	IP65

Wiring and Configuration Considerations

The controller uses dedicated terminals for process input, power supply, motor control outputs, and communication. For the UT150 with the /RS option, the documented RS-485 connections are:

Terminal	Function
3	RSB (+)
4	RSA (-)
5	SG

The motor control relay connections and communication terminals must be identified separately during wiring. Confirm the actuator's electrical requirements and the controller's terminal arrangement before connecting the motor drive circuit.

Frequently Asked Questions

Q: Does the UT150-RR/RS require a valve position feedback signal?

A: The UT150 motorized valve controller documentation describes automatic valve-position estimation for the UT150/Z configuration. However, the supplied UT150-RR/RS ordering code does not include the /Z option, so the /Z-specific position-control features should not be assumed.

Q: What communication interface does the UT150-RR/RS provide?

A: It provides RS-485 communication through the /RS option. Supported protocols include MODBUS, PC-link, and Ladder. Communication parameters must be configured to match the connected equipment.

Q: What is the difference between the -RR and /RS codes?

A: The -RR code identifies the two relay contact control outputs, while /RS identifies the communication function. They describe separate parts of the controller configuration.

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