The Yokogawa UR1BG3-008-020102-008/Z is a highly advanced Single-Input Intelligent Signal Conditioner from the Yokogawa UTAdvanced series.<br />
This "smart" DIN-rail mounted unit is designed for complex signal processing applications. It provides high-performance electrical isolation, signal conversion, and advanced mathematical computation. The complex suffix code defines its precise configuration: it is set up to accept a 4-20 mA DC current input signal, perform a Square Root (SQRT) extraction function on it, and produce two independent, isolated 4-20 mA analog outputs based on the result. The /Z suffix is a common Yokogawa designation for a standard production model.
Key Parameters:
| Category | Specification |
| :--- | :--- |
| Series | Yokogawa UTAdvanced (UTA) |
| Function | Dual Output Isolator with Square Root Extraction |
| Input Signal | 4 to 20 mA DC (Analog Current) |
| Mathematical Function | Square Root (SQRT) Extraction (for flow calculation) |
| Output 1 Signal | Analog, 4 to 20 mA DC (isolated, linear after SQRT calc) |
| Output 2 Signal | Analog, 4 to 20 mA DC (isolated, linear after SQRT calc) |
| Power Supply | Not specified in model; must be ordered separately or is default (e.g., 100-240V AC or 24V DC). |
| Isolation | Input-to-Output1-to-Output2-to-Power: 1500 V AC (Full isolation) |
| Accuracy | Typically ±0.1% of span (high accuracy) |
| Low Cutoff (Square Root) | User-configurable to avoid instability near zero flow (e.g., 0.0% to 20.0%). |
| Configuration | Configurable via front-face buttons and LCD display. Settings include input/output ranges, damping, and low cutoff. |
| Operating Temperature | -20 to +70°C (-4 to +158°F) |
| Mounting | Standard DIN rail (35mm) |
| Status Indicators | LCD display for values and status; LEDs for power and communication. |
Typical Application
This module is a classic flow signal converter:
Input: A 4-20 mA signal from a differential pressure (DP) transmitter mounted on an orifice plate. This signal is proportional to the square of the flow rate (ΔP ∝ Flow²).
Processing: The conditioner performs Square Root (SQRT) extraction on the input signal.
Output 1: A 4-20 mA output proportional to the actual flow rate is sent to the DCS for control and monitoring.
Output 2: A second, identical 4-20 mA output is sent to a flow recorder or a safety system for totalization or independent monitoring.