The Yokogawa UD1CG3-004N-6AA-2TB-N is a highly advanced Single-Input Intelligent Signal Conditioner from the Yokogawa UTAdvanced series.<br />
This "smart" DIN-rail mounted unit is designed for critical process applications. It provides high-performance electrical isolation, signal conversion, linearization, and alarm functionality. The complex suffix code defines its precise configuration: it is set up to accept a DC Voltage input signal (e.g., 0-5V, 1-5V), convert it into an isolated 4-20 mA analog output, and provide two independent alarm relays with enhanced functionality. The -N suffix indicates a standard 100-240V AC power supply.
Key Parameters & Specifications:
| Category | Specification |
| :--- | :--- |
| Series | Yokogawa UTAdvanced (UTA) |
| Function | DC Voltage Isolator with Advanced Dual Alarms |
| Input Signal | DC Voltage (Typical range: 1-5V DC, as set by 6A code) |
| Output Signal | Analog, 4 to 20 mA DC (isolated) |
| Number of Alarms | 2 independent alarms (inferred from common 2TB configuration) |
| Alarm Type | SPDT Relay (Form C) contacts |
| Relay Rating | Typically 250V AC, 2A (resistive load) |
| Power Supply | 100 - 240V AC, 50/60 Hz |
| Isolation | Input-to-Output-to-Power-to-Relays: 1500 V AC (Full isolation) |
| Accuracy | Typically ±0.1% of span (high accuracy) |
| Configuration | Configurable via front-face buttons and LCD display. Settings include input/output ranges, advanced alarm setpoints and modes (e.g., HI, HI-HI, LO, LO-LO, window, deviation), hysteresis, and damping. |
| 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, alarm status, and communication. |
Typical Application
This module is ideal for applications requiring reliable signal isolation and robust alarm management:
Input: A 1-5V DC signal from a process controller or a sensor with a voltage output.
Processing: The conditioner isolates the signal, converts it to a 4-20mA output, and displays the real-time value.
Output: A clean, isolated 4-20 mA output is sent to a final control element, such as a control valve.
Alarm 1: The first relay is set to trigger a deviation alarm if the process variable strayes too far from its setpoint.
Alarm 2: The second relay is set to trigger a critical HI-HI alarm to initiate a safety shutdown.