{"product_id":"bachmann-rs204-4-channel-serial-interface-module","title":"Bachmann RS204 4-Channel Serial Interface Module","description":"\u003ch2\u003eBachmann RS204 Serial Interface Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBachmann RS204\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRS204\u003c\/strong\u003e Serial Interface Module, operates as a dedicated hardware component for asynchronous serial data acquisition within the M200 controller backplane.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eRS204\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eBachmann\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eAustria\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot specified in source data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard M200 DIN-rail module chassis footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-30 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eTyp. 120 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Interfaces\u003c\/td\u003e\n\u003ctd\u003e4 independent, asynchronous ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Protocols\u003c\/td\u003e\n\u003ctd\u003eRS232, RS422, RS485 (software-selectable, combinable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Baud Rate\u003c\/td\u003e\n\u003ctd\u003e1.5 MBaud (RS422\/RS485), 115.2 KBaud (RS232)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFIFO Buffer\u003c\/td\u003e\n\u003ctd\u003e128 bytes (Tx\/Rx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGalvanic Isolation\u003c\/td\u003e\n\u003ctd\u003e500 V between system bus, interfaces, and channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination\u003c\/td\u003e\n\u003ctd\u003eIntegrated resistors, connect\/disconnect via DIP switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e18 VDC to 34 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, UKCA, cULus, ABS, BV, DNV, KR, LR, NK, RINA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity\u003c\/h3\u003e\n\u003cp\u003eThe RS204 integrates directly with the Bachmann M200 backplane bus architecture to execute high-speed serial data transfers. Engineers configure the module via software to select specific protocol standards, allowing mixed RS232, RS422, and RS485 configurations on a single module. The 128-byte FIFO buffer per port manages data flow, while the auto flow-control mechanism executes automatic handshakes to prevent buffer overruns. This deterministic backplane communication supports baud rates up to 1.5 MBaud for RS422 and RS485 links, ensuring low-latency data exchange between the M1\/M200 controller and external field devices such as barcode scanners, HMIs, weigh scales, and legacy modems.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can I mix different serial protocols on the same RS204 module?\u003cbr\u003eA: Yes. Each of the four ports operates independently. You configure the protocol standard (RS232, RS422, or RS485) via software, allowing any combination of protocols across the four channels on a single module.\u003c\/p\u003e\n\u003cp\u003eQ: How is the termination resistor managed for RS422 and RS485 links?\u003cbr\u003eA: The module features integrated terminating resistors for RS422 and RS485 modes. You engage or disengage these resistors physically using the DIP switch located on the module, eliminating the need for external termination components at the module location.\u003c\/p\u003e\n\u003cp\u003eQ: What is the galvanic isolation rating between the channels?\u003cbr\u003eA: The module provides 500 V galvanic isolation between the system bus and each individual interface, as well as between the individual interfaces themselves. This prevents ground loops and protects the M200 backplane from voltage transients on the field wiring.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply Verification\u003c\/strong\u003e: Verify that the external 24 VDC supply falls within the 18 VDC to 34 VDC range before inserting the module into the M200 backplane. The module draws approximately 120 mA at 24 VDC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermination Configuration\u003c\/strong\u003e: Before wiring RS422 or RS485 multidrop networks, locate the DIP switch on the RS204 module. Set the switch to the ON position to engage the integrated terminating resistors at the physical ends of the bus. Leave the switch OFF for point-to-point links or intermediate nodes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding\u003c\/strong\u003e: Route serial communication cables away from high-voltage power conductors. Terminate the cable shield at the KZ 51\/02 B terminal block using the shortest possible path to maintain signal integrity and comply with IEC 60664-1 Pollution Degree 2 requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Limits\u003c\/strong\u003e: Confirm the ambient temperature within the control panel remains between -30 deg C and +60 deg C for standard units. If operating in environments with condensing humidity, verify the installed module carries the RS204 CC ColdClimate designation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoftware Configuration\u003c\/strong\u003e: After mechanical installation, access the Bachmann SolutionCenter or Device Manager to assign the specific protocol (RS232, RS422, RS485) and baud rate to each individual channel before commissioning the serial link.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"BACHMANN","offers":[{"title":"Default Title","offer_id":52894992269624,"sku":"RS204","price":185.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/263..jpg?v=1788328760","url":"https:\/\/www.automodulexpert.com\/products\/bachmann-rs204-4-channel-serial-interface-module","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}