MECS CS-1000 UTX1700PTFE module

Description

MECS CS-1000 UTX1700PTFE module

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• UTX1700PTFE is an IO Link slave transceiver chip that serves as a bridge between the MCU of external sensors or actuators and the 24V signal line that supports IO Link communication. When the IO Link device is connected to the master station, the master station initializes communication and exchanges data with the MCU, while HMT7742 acts as the physical layer for communication.

  Due to the fact that the three indicator lights (rated voltage of 24 V) controlled by the output port of UTX1700PTFE are powered by the IO Link power line, it is necessary to monitor the current on the power line in order to trigger appropriate corrective measures when the current exceeds a set threshold, such as cutting off the indicator lights from the IO Link power line. The current monitoring module uses an INA194 current detection amplifier. As a high current detector, INA194 is directly connected to the power supply and can detect all downstream faults. It has a very high common mode suppression ratio, as well as a large bandwidth and response speed. It can amplify the voltage on the induction resistor 5O times and output it to the forward input terminal of the MCU’s internal voltage comparator, AIR0. When the voltage value of AIR0 exceeds the threshold set at the reverse input terminal, the PB0 output is controlled to be low, and the indicator light LAMP can be cut off from the IO Link power line to achieve overcurrent protection function. This part of the circuit is shown in Figure 6.

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