1790D-T4R0

The 1790D-T4R0 from Allen Bradley is a DeviceNet RTD base block designed for precise temperature measurements with four input channels tailored for RTD and resistance inputs. The module provides a resolution of 16 bits across a 625 Ω range, translating to a temperature sensitivity of 0.1°C or 0.1°F per bit. This performance is supported by advanced 20-bit Sigma-Delta modulation technology.

Data acquisition is executed efficiently with a module scan time of 8 milliseconds per channel, particularly when the notch filter is configured for a frequency of 60 Hz. The module ensures overall accuracy of 0.2% full-scale within an operating range of 0 to 60 °C, making it suitable for many industrial temperature monitoring applications. Users can configure the notch filter settings to various frequencies, including a default of 10 Hz, as well as options up to 500 Hz, allowing for adjusted performance in different operational contexts.

The module's design incorporates essential diagnostic features, such as open wire detection to indicate out-of-range states or wiring issues, ensuring system reliability. Operating with an excitation current of 1 mA, this base block benefits from a high input impedance of 5 MΩ, which minimizes signal interference from connected sensors. It achieves typical input accuracy of ±0.5 °C, reinforcing its suitability for demanding applications. The UPC for this device is 612598283842, facilitating tracking and identification.