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1756-IRT6I

The Allen-Bradley 1756-IR6I is a temperature-measuring analog module. This is an analog module that is used with Resistance-Temperature Detectors (RTD) sensors.

The 1756-IR6I module provides two data formats such as integer mode and the floating-point mode. When choosing the integer mode, the integrated features are multiple input ranges, notch filter, and real-time sampling. The floating mode includes all these features with the addition of temperature linearization, process alarms, rate alarms, and digital filtering. It also has selectable temperature unit to such as Celsius or Fahrenheit. There are Four (4) possible input ranges for the module including 1 to 487 m?, 2 to 1000 m?; 4 to 2000 m?;, and 8 to 4000 m?;. These ranges designate the minimum and maximum signals detectable by the module. It has Six (6) individually isolated RTD inputs and a resolution of 16 bits. Actual resolution includes 7.7 m?bit for 1-487 Ohms; 15 m?/bit for 2-1000 Ohms, 30 m?/bit for 4 – 2000 Ohms and 60 m?/bit for 8 – 4020 Ohms. The module’s notch filter line noise filtering. Make sure to choose the filter that closely matches the application’s anticipated noise frequency. The digital filter smoothens data by eliminating noise transients on each input channel.

The 1756-IR6I’s real-time sampling feature lets the module multicast data it gathered from scanning all of its input channels. To enable multicast, configure Real-Time Sampling (RTS) period and a Requested Packet Interval (RPI) period.

Protection features are also embedded with this module such as under-range/over-range detection, feature of the module which is used to monitor if the input signal falls beyond the limits set by the input range. The process alarms work similarly however the process limits are manually set by the user. The integrated rate alarm allows the module to detect a rapid increase or decrease within a short defined period of time. Rate alarm is only available in applications using floating point. Wire off detection feature provide loop wiring completeness. It can detect if the RTB or a wire in the module has been disconnected.