<div class="detailmodule_dynamic"><kse:widget data-widget-type="relatedProduct" id="1005000004105228" title="" type="relation"></kse:widget></div> <div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><br />Features:<br />1. Original 74HC14 + SP485 chip to ensure stable transmission: the TTL to RS485 converter module uses a combination of high-quality 74HC14 and SP485 chips to provide excellent signal conversion performance<br />2. Lightning gas discharge tube, enhance anti-interference ability: built-in lightning gas discharge tube, can effectively absorb and discharge atmospheric overvoltage, to prevent lightning strikes and other emergencies on the equipment caused by the damage<br />3. Three transient suppression diodes TVS, comprehensive protection circuit: equipped with three sets of transient suppression diodes (TVS), used to prevent electrostatic discharge (ESD), induced lightning strikes and other transient overvoltage events on the circuit<br />4. Thermal fuse for overcurrent protection: Thermal fuse for overcurrent protection, when the current exceeds the safety threshold, the fuse will quickly blow, cutting off the power supply, to avoid fires and equipment damage due to short-circuits or overloads.<br />5.120&Omega; termination resistor, optimize signal integrity: Built-in 120&Omega; termination resistor, users only need to short R12 to easily access the resistor, effectively eliminating signal reflection and echo interference, enhance the signal integrity of the RS485 bus.<br />6. Power PWR and RXD, TXD signal indicator, status at a glance: the module is equipped with power (PWR) and receive (RXD), transmit (TXD) signal indicator, real-time display of the work status</p> <p>Parameter:<br />Supply voltage:<br />DC 3.3V (1.8-5.5V)<br />DC 5V (2-5.5V)<br />Current: 8-10A<br />Communication interface: TTL<br />Product size: 45*20mm</p> <p>Uses:<br />1. MCUs such as microcontroller, ARM, FPGA, Arduino and other MCU's TTL serial port to communicate with RS485 level devices<br />2. Serial port expansion of the device</p> <p>Instructions for use:<br />(Access to the MCU as an example, explaining how to connect each row of pins) TTL (UART) terminal<br />VCC: connect to DC 3V or 5V.<br />GND:: connect to GND<br />TXD: connect to MCU.RX (signal flow: MCU.RX &lt;&lt; this module &lt;&lt; RS485)<br />RXD: connect to MCU.TX (signal flow direction: MCU.TX&gt;&gt;this module&gt;&gt;RS485)<br />RS485 end:<br />A+: connect to RS485.<br />B-: connect to RS485.<br />GND: this GND can not be connected</p> <p>Package include:<br />Module*1<br /></p></div></div>