UT152-AN/RET_YOKOGAWA_PRODUCT_吉林易择科技技术发展有限公司

The Yokogawa UT152-AN/RET is a single-channel intrinsically safe (IS) isolator designed for installation in Yokogawa UTSX Series rail-mounted housings. It functions as a rectifier-type isolator with an additional retransmission output, providing both safety isolation and signal replication. The module accepts a 4-20 mA signal from a 2-wire transmitter in a hazardous area, supplies loop power to it, and outputs two isolated 4-20 mA signals: one for the control system and one for retransmission to secondary devices (e.g., recorders, displays). The "AN" suffix indicates compliance with specific safety standards (e.g., ATEX, IECEx), while "RET" denotes the retransmission output feature.

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Technical Specifications
Category Parameter Specification
General Model UT152-AN/RET
Type Intrinsically Safe Isolator (Rectifier with Retransmission)
Mounting DIN rail mount in Yokogawa UTSX Series housing
Input (Field Side) Signal 4-20 mA DC (from 2-wire transmitter)
Intrinsic Safety Parameters Ui ≈ 28 V DC, Ii ≈ 93 mA (compliant with ATEX/IECEx)
Input Impedance 85 Ω (for voltage measurement)
Output 1 (System Side) Signal 4-20 mA DC (primary output to control system)
Load Resistance 0-750 Ω
Output 2 (Retransmission) Signal 4-20 mA DC (isolated retransmission output)
Load Resistance 0-750 Ω
Accuracy ±0.1% of span (for both outputs)
Power Supply Voltage 20.4-31.2 V DC (supplied to UTSX housing)
Consumption Approx. 1.2 W (at 24 V DC)
Isolation Between Input/Outputs/Power 1500 V AC
Performance Accuracy ±0.1% of span
Temperature Drift ±0.015% of span per °C
Response Time < 150 ms
Environment Operating Temperature -20°C to +60°C
Humidity 10-90% RH (non-condensing)
Key Features
Dual Outputs: Primary output to DCS/PLC + isolated retransmission output for auxiliary devices.

Intrinsic Safety: Complies with ATEX/IECEx standards for hazardous areas (Zone 0/1).

Loop Power: Supplies power to 2-wire transmitters (4-20 mA) in hazardous areas.

High Isolation: 1500 V AC isolation between input, outputs, and power supply.

High Accuracy: ±0.1% span accuracy ensures precise signal transmission.

Applications
Interfacing 2-wire transmitters (e.g., pressure, temperature) in hazardous areas with control systems.

Retransmitting signals to secondary devices like recorders, displays, or additional controllers.

Process industries (oil/gas, chemicals) requiring redundant signal paths or auxiliary monitoring