Parameter Table
Parameter Category Specification for UD1A-200N-1KD-2SA-2
Model Number UD1A-200N-1KD-2SA-2
Product Type Digital Indicator / Controller with Alarms
Form Factor 48x48mm panel cutout, DIN rail mountable
Display Dual Display (Main and sub-display)
• Main: 4-digit, 0.36" red LED
• Sub: 4-digit, 0.2" red LED
Input Signal (Universal) Accepts a wide range of signals, configurable:
• DC Voltage: mV, V (e.g., 0-5V, 1-5V)
• DC Current: mA (e.g., 0-20mA, 4-20mA)
• Temperature: Various Thermocouples (K, J, R, S, etc.) and RTDs (Pt100)
Alarm / Control Outputs 2 Relay Outputs (2S)
• Type: SPDT (Single Pole Double Throw) relay contacts
• Rating: 250V AC, 2A (resistive load)
Auxiliary Output Transmitter Power Supply (A)
• Output: 24V DC (±10%), max. 30mA
• Purpose: Used to power a 2-wire 4-20mA transmitter (e.g., a pressure sensor) directly, simplifying wiring.
Communication Option RS-485 (2)
• Protocol: Modbus RTU
• Function: Allows for remote monitoring, configuration, and data reading by a PLC, DCS, or SCADA system.
Power Supply 100-240V AC (50/60 Hz) or 24V AC/DC (depending on ordered variant; this is a common standard rating for this series).
Front Panel Protection IP50 (Dust protected)
Key Features • Scaling function for input signals
• High/low alarm limits for each relay
• PV (Process Variable) value, sensor burnout, and range indication
• Programmable via front keys or communication interface
Key Features and Applications
Versatility: The universal input allows one unit to be used for countless applications—temperature, pressure, level, flow, etc.—by simply changing its software configuration.

Integrated Solution: The built-in transmitter power supply eliminates the need for an external DC power supply for sensors, reducing component count and cabinet space.

Control and Alerting: The two relay outputs can be used to activate alarms (e.g., high-temperature warning), control devices (e.g., turn on a fan or heater), or initiate safety shutdowns.

System Integration: The Modbus communication enables seamless integration into modern industrial networks for centralized monitoring and data logging.

Applications: Commonly used in HVAC systems, industrial ovens, plastic processing machinery, water treatment systems, and any application requiring precise monitoring and alarm functionality.