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UT150L-RN

The Yokogawa UT150L-RN is a 1/16 DIN size limit controller. It’s designed for safety / process limit control applications — e.g. to trigger alarms or shutdowns when temperature (or other measured variable) exceeds or falls below set limit(s). It features universal input, relay output (for control/limit), optional retransmission, alarms, etc.

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Parameters
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Specifications
Parameter Value / Description
Power Supply 100-240 VAC, 50/60 Hz
Power Consumption ~8 VA
Input Types & Ranges Universal input; measured input selectable by software: thermocouple types (K, J, T, E, R, S, B, N, L, U, Platinel2), RTDs (Pt100, JPt100), DC mV / DC V signals (0-100 mV, 0-5 V, 1-5 V, 0-10 V, etc.)
Input Accuracy (at 23±2 °C) - Thermocouple: ±2 °C ±1 digit (varies by type / range, worse at extremes)
- RTD: ±1 °C ±1 digit
- Voltage / mV: ±0.3% span ±1 digit
Sampling Period 500 ms
Burnout Detection For thermocouple or RTD; burnout to upscale only; cannot be turned off
Input Resistances & Limits ~1 MΩ or greater for TC / DC mV; similar for DC V input
Signal source resistance limits: e.g. up to ~250 Ω for TC or mV input; higher for DC V input; wiring resistance for RTD limited (~10 Ω per wire, and wires matched)
Noise Rejection Normal mode ≥ 40 dB (50/60 Hz)
Common mode ≥ 120 dB (for most inputs)
Control / Limit Output Relay contact, configured for limit control (high or low limit)
Alarm Outputs 2 relay alarms (optional via suffix /AL)
Retransmission Output Optional (/RET) — measured value retransmitted as 4-20 mA DC; load resistance up to ~600 Ω; accuracy ±0.3% span
External Contact Inputs Optional (/EX) — e.g. for resetting, switching setpoints, etc.
Communication Optional RS-485 (/RS) with selectable baud rates (e.g. 2400, 4800, 9600 bps)
Dimensions & Mounting 1/16 DIN panel cut-out; compact; front panel IP65 splash/dust proof when properly installed
Safety & Standards FM approval (for the limit controller function); conformance to safety and EMC standards relevant to measurement / process instrumentation