ebm-papst EC communication The best connections for a flexible ...

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Interface converterRS232 – RS485This interface converter permits bi-directional connection of RS232 devices (laptop or PDA) withbus-compatible devices (electronic commutation units with RS485 interface). The power supply isfrom the RS232 output of the laptop or PDA.Nominal dataType 21495-2-0174Dimensions mm 73 x 37 x 19Power supply VDC 7–12**Otherwise via RS232 DTR, TxD and RTS signalOperating modeStatus displayHousingTerminalTerminating resistorDelivery scopeRS485, 2-wire mode with echo and automatic controlVia LEDs– PWR: Power supply– TXD: Data transfer (send)– RXD: Data transfer (receive)Plastic housingScrew terminal, TRX+ = RSA, TRX– = RSBBuilt-in, activated via switch– Interface converter– English-language operating manual14
Connecting the interface converter – example of a fan with MODBUS RTU compatibilityThe combination with the EC Control and LISA 5 programs enables cost-effective programming and monitoring of bus-compatible EC fans.The interface converter can be connected directly and used without any special setup.Note: The interface converter does not have any electrical isolation and thus is suitable for battery-operated devices only.The switch (on top of the interface converter) must be set to RS485.1External sensorPressure sensor,temperature sensorPower supplyFansMODBUS RTU RSA/RSBLaptopInterface converterArt. No. 21495-2-017421Example terminal assignment for fan2Interface converter connectionKL3 KL2 PE KL1RSARSBGNDAin1 U+10VAin1 IDin1NOCOMNCPEL1Din2Din3GNDAin2 U+20VAin2 IAoutL2L3TRX+ TRX– GND RX+ RX–15
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