Parameters & Specifications
Category Specification
Model Number UD1AG3-200N-1KD-2TA-N/CN
Product Line ProSafe-RS (Also compatible with CENTUM VP)
Function Dual-channel Isolated Analog Input
Input Signal RTD (Pt100) - The code 1KD specifically denotes a 3-wire Pt100 RTD input.
Number of Channels 2 (Dual-channel, as indicated by 2 in 2TA)
Isolation Channel-to-Channel and Channel-to-Backplane isolation.
Input Range Defined by the RTD type (Pt100). Typical range: -200 °C to +850 °C.
Accuracy ±0.1% of reading or better (typical for this module type, specific value depends on configuration and range).
Power Supply Supplied from the node baseplate (24 V DC).
License Type N/CN - This suffix denotes the hardware configuration (input type and terminal assignment), not a software license. This is a key difference from the previous UR1AG3 module.
Safety Certification TÜV Rheinland certified per IEC 61508 for use in SIL 2 applications. (Note: Many Yokogawa AI modules are SIL 3 capable; please verify the specific certification document for this exact model).
Operating Temperature -40 °C to +70 °C (-40 °F to +158 °F)
Mounting Plug-in module for N-Node or F-Node baseplates.
Sensor Connection 3-wire RTD connection per channel.
Decoding the Model Number Suffix
UD1AG3-200N: Base model for a dual-channel analog input module.

-1KD: Input Type Code for a 3-wire Pt100 RTD.

-2TA: Terminal Assignment Code for a 2-channel module with a specific internal wiring layout.

-N/CN: Hardware Configuration Suffix that encapsulates the -1KD-2TA specification.

Key Features & Functions
High Accuracy & Stability: Precisely measures small resistance changes from RTDs for critical temperature monitoring.

3-Wire Compensation: The 1KD type supports 3-wire RTD connection, which allows the module to compensate for lead wire resistance, significantly improving measurement accuracy over long distances.

Enhanced Safety: Designed and certified for safety applications, providing reliable data for Safety Instrumented Functions (SIFs).

Built-in Diagnostics: Continuously monitors for field circuit faults such as sensor burnout (open circuit), short circuit, and wire breakage in the RTD leads.

Dual-channel Redundancy: Two independent channels allow for 1oo2D (1 out of 2 with Diagnostics) voting architectures, increasing system availability and safety.