Technical Parameters / Specifications
Category Parameter Specification
General Model UT150-RR/RS
Type Single-channel Alarm Trip Module with Remote Reset
Mounting DIN rail mount inside a Yokogawa UTSX Series housing
Input Signal 4 to 20 mA DC
Input Resistance Approx. 51 Ω
Burn-out Detection Up-scale (HI) or Down-scale (LO) selection via DIP switch
Output Type 2 independent SPDT Electro-mechanical Relays
Contact Rating 2 A @ 250 V AC / 30 V DC (Resistive load)
Default State Energized (Normal) / De-energized (Alarm) - configurable
Alarm Function Setpoints 2 (AL1 and AL2). Each can be set individually.
Setpoint Range Approximately 0 to 105% of span (4-20 mA)
Setting Accuracy ±0.5% of span (at 25°C)
Reset Function Local (front button) and Remote (dry contact signal)
Power Supply Voltage 120 V AC (60 Hz)
Consumption Approx. 4.5 VA (at 120 V AC)
Remote Reset Signal Dry contact input (momentary short circuit across remote reset terminals)
Contact Rating 24 V DC, 10 mA
Performance Response Time < 200 ms
Isolation 1500 V AC between Input-Output 1-Output 2-Power
Environment Operating Temperature -20°C to +60°C
Storage Temperature -40°C to +80°C
Humidity 10 to 90% RH (non-condensing)
Function and Application
Function:

Monitoring: Continuously monitors a 4-20mA process signal.

Comparison & Alarm: Triggers its relay outputs when the process signal breaches the configured setpoints.

Latching: The alarm state latches and requires a reset command to clear.

Remote Acknowledgment: The remote reset feature allows an operator in a control room to acknowledge and reset the alarm from a distant location. Application:

Used in applications identical to the UT150-RN/RS but specifically for panels and facilities where the standard available power is 120V AC, 60 Hz.

North American Markets: Primarily used in the United States, Canada, and other regions with 120V AC standard power.

Remote Process Shelters: For alarms in unmanned remote facilities where physical access for a reset is impractical.

Centralized Control: Allows all alarm acknowledgments to be performed from a central control room console.

Critical Shutdown Systems: Used in safety interlock systems where a remote reset capability is required.