PT100/PT1000 Temperature Sensor Input Module
The EKE-Trainnet® PTI modules are temperature sensor input modules.
They acquire the signals from the PT-100 (PTI2037A) or PT-1000 (PTI3593A) temperature sensors (resistance measurement) and convert them into temperature values expressed in degrees Celsius.
The PTI modules make the measured temperature values available to the train computer’s Central Processing Unit (CPU). The EKE-Trainnet® PTI module can be used as a part of an EKE-Trainnet® Train Control and Management System, Vehicle Control Unit or Event Recorder. Alternatively, the EKE-Trainnet® PTI can be fitted into the EKE-Trainnet® Remote I/O System.
Key Features
The EKE-Trainnet® PTI has six measurement channels which can measure temperature within the -110 to +325 °C range with over range indication. Each channel is isolated from each other, thus a fault in one channel will not affect the others. The temperature sensors can be connected using 2-wire, 3-wire or 4-wire schemes providing flexibility.
The embedded processor also implements diagnostic functions and reports to the train computer’s CPU module if it suspects that the input values cannot be trusted. The EKE-Trainnet® PTI detects the temperature sensor as well as cable faults and input channel faults.
The measurement resolution is 0.01 °C, with accuracy better than ±1 °C within the measurement range.
The module development is based on the railway standards EN 50126, EN 50128 and EN 50129 in accordance with safety integrity level SIL 2. A non-SIL version of the module is also available.
The module has its own 32-bit embedded processor that uses factory calibration values to convert measurement values to degrees Celsius with the best possible accuracy.
