SY Z-W Pt100/Cu50 RTD to Analog Signal Transmitter

Product Advantage

1. Highly Integrated, Cost-Effective Design

The SY Z-W series is a highly integrated mixed-signal IC that combines an isolated DC-DC converter, signal calibration circuitry, RTD linearization, and long-wire compensation on a single chip. This integration minimizes external components, simplifies PCB layout, and provides a cost-efficient solution for multi-channel temperature acquisition, significantly reducing overall BOM and manufacturing costs.

2. Robust Signal Isolation for Harsh Environments

Featuring 3000VDC two-port isolation between the auxiliary power supply and the signal channel, this IC effectively eliminates ground loops and rejects common-mode interference. This ensures stable, noise-free signal transmission in electrically noisy industrial settings. It is particularly critical for applications requiring high safety and reliability, such as power monitoring and medical temperature control systems.

3. High Accuracy with Built-in Linearization

To address the inherent non-linearity of RTD sensors, the chip integrates dedicated linearization and long-cable compensation circuits. It achieves an accuracy and linearity error rating of Class 0.2 (relative to temperature) , providing precise temperature data essential for high-accuracy control and monitoring applications in demanding industrial processes.

4. Versatile Compatibility and Flexible Power Supply

The device supports Pt100 and Cu50 RTD inputs and is compatible with 2-wire, 3-wire, or 4-wire sensor connections. It operates from a single power supply of 5V, 12V, 15V, or 24VDC, offering flexible integration into existing systems. Standardized analog outputs (0-20mA, 4-20mA, 0-5V, 0-10V) ensure easy interfacing with most PLCs, DCS, and instruments.

5. Compact, Industrial-Grade Package

Housed in a standard SIP 12-pin UL94V-0 flame-retardant package, the IC features an ultra-small footprint suitable for high-density PCB mounting. It is rated for an industrial temperature range of -20℃ to +70℃ and is designed to withstand humidity and vibration, ensuring reliable operation in tough field environments.

Technical Parameters

Product Uses

1.Industrial PLC/DCS Temperature Acquisition

In smart manufacturing, this transmitter converts remote Pt100 RTD signals into standard 4-20mA or 0-10V outputs for direct connection to PLC or DCS analog input modules. Its low cost and small size make it ideal for distributed temperature monitoring points in cost-sensitive industrial sites, ensuring accurate, long-distance signal transmission.

2.Standardization and Long-Distance Signal Transmission

Designed to linearize non-standard RTD signals into international standard analog outputs. The built-in long-wire compensation and interference suppression circuits guarantee stable and accurate transmission of temperature signals (e.g., oil or water temperature) over hundreds of meters to the control room, effectively preventing signal attenuation.

3.Equipment Temperature Control and Alarm Systems

Integrated into temperature monitoring modules for power transformers, motor bearings, or medical devices. When temperature exceeds limits, the linear output triggers host alarms or actuators (e.g., cooling fans, shut-off valves) for closed-loop thermal control. Its wide operating range (-20~+70℃) suits diverse equipment environments.

4.Multipoint Distributed Temperature Networks

Leveraging its ultra-small SIP 12Pin package, multiple transmitters can be densely integrated into confined spaces (e.g., switchgear, probe housings), each connected to a separate RTD. This enables cost-effective, distributed temperature acquisition, commonly used in grain silo monitoring or pipeline temperature tracking.

5.Ground Loop Interference Suppression and Isolation

In environments with strong electrical equipment like variable-frequency drives, ground potential differences can impair measurement. The 3000VDC isolation between the auxiliary power and signal channel effectively breaks ground loops, providing clean, reliable RTD signal conversion for precision instruments or medical devices.