{"product_id":"plx31-mbtcp-mbs4-prosoft-modbus-tcp-ip-to-modbus-master-slave-gateway","title":"PLX31-MBTCP-MBS4 | Prosoft Modbus TCP\/IP to Modbus Master\/Slave Gateway","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eProSoft PLX31-MBTCP-MBS4\u003c\/strong\u003e is a \u003cstrong\u003eModbus TCP\/IP to Modbus Serial (RTU\/ASCII) 4-Port Gateway\u003c\/strong\u003e that enables high-speed bi-directional data transfers between \u003cstrong\u003eModbus TCP\/IP-enabled PACs\/SCADA systems\u003c\/strong\u003e and \u003cstrong\u003eModbus serial devices\u003c\/strong\u003e. Featuring four independent serial ports, this gateway can connect up to \u003cstrong\u003e400 Modbus serial devices\u003c\/strong\u003e (100 per port), dramatically reducing the number of gateways required in large-scale distributed automation systems. It is ideal for SCADA, power monitoring, and building management applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e PLX31-MBTCP-MBS4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Modbus TCP\/IP to Modbus Serial 4-Port Gateway\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e ProSoft PLX30 Gateway Platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEthernet Interface:\u003c\/strong\u003e 1 × 10\/100 Mbps RJ45\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Ports:\u003c\/strong\u003e 4 × RS-232\/RS-485 (software selectable per port)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModbus TCP:\u003c\/strong\u003e Client (Master) and Server (Slave) modes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModbus Serial:\u003c\/strong\u003e RTU and ASCII (Master or Slave per port)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Device Capacity:\u003c\/strong\u003e Up to 400 devices (100 per port at 32 devices per segment)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e ProSoft PLX50 Configuration Utility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e 10–36 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e DIN rail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -25°C to +70°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -40°C to +80°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications:\u003c\/strong\u003e CE, UL, cULus, ATEX, IECEx (model dependent)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFeatures \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour Serial Ports:\u003c\/strong\u003e Independent RS-232\/485 ports reduce gateway count and wiring complexity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Device Density:\u003c\/strong\u003e Supports up to 400 serial Modbus devices from a single Ethernet connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Protocol Bridge:\u003c\/strong\u003e Transparently converts Modbus TCP to Modbus RTU\/ASCII without PLC programming\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Port Configuration:\u003c\/strong\u003e Each port independently configurable as Master or Slave, RTU or ASCII\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Diagnostics:\u003c\/strong\u003e Built-in HTTP server for port status monitoring, traffic statistics, and firmware updates\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConformal Coating Option:\u003c\/strong\u003e Available for corrosive or high-humidity environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSCADA systems polling large numbers of Modbus RTU flow meters and power monitors\u003c\/li\u003e\n\u003cli\u003eBuilding automation integrating legacy Modbus serial HVAC controllers into BACnet\/IP over Modbus TCP\u003c\/li\u003e\n\u003cli\u003eWater\/wastewater treatment with distributed Modbus serial pump controllers and valve actuators\u003c\/li\u003e\n\u003cli\u003eSolar farm inverter monitoring via Modbus RTU serial strings aggregated to central Modbus TCP SCADA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN Rail Mount:\u003c\/strong\u003e Snap the PLX31-MBTCP-MBS4 onto a 35 mm DIN rail in an IP20 cabinet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Connection:\u003c\/strong\u003e Apply 24VDC (10–36VDC range) to the power connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEthernet Connection:\u003c\/strong\u003e Connect the RJ45 port to your Modbus TCP\/IP network\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Wiring:\u003c\/strong\u003e Connect Modbus serial devices to Ports 1–4 using shielded twisted-pair cable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermination:\u003c\/strong\u003e Install 120 Ω termination resistors at both ends of each RS-485 segment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePLX50 Configuration:\u003c\/strong\u003e Define Modbus TCP client\/server settings and serial port parameters (baud, parity, mode)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDevice Mapping:\u003c\/strong\u003e Map Modbus TCP registers to specific serial ports and slave addresses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTesting:\u003c\/strong\u003e Use the web interface to verify communication statistics on all four serial ports\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can all four serial ports operate simultaneously?\u003c\/strong\u003e\u003cbr\u003e\nA: \u003cstrong\u003eYes\u003c\/strong\u003e, all four ports operate independently and simultaneously, each with its own baud rate and protocol settings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum baud rate per serial port?\u003c\/strong\u003e\u003cbr\u003e\nA: Each serial port supports baud rates up to \u003cstrong\u003e115.2 kbps\u003c\/strong\u003e (standard Modbus RTU limit).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this gateway require a PLC?\u003c\/strong\u003e\u003cbr\u003e\nA: \u003cstrong\u003eNo\u003c\/strong\u003e, the PLX31-MBTCP-MBS4 is a \u003cstrong\u003estand-alone gateway\u003c\/strong\u003e. It bridges Modbus TCP to serial without any PLC backplane requirement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I use RS-232 and RS-485 on different ports simultaneously?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, each port is \u003cstrong\u003eindependently configurable\u003c\/strong\u003e as either RS-232 or RS-485 (2-wire or 4-wire).\u003c\/p\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCalculate total serial device count and divide by 100 to determine if one gateway is sufficient\u003c\/li\u003e\n\u003cli\u003eUse RS-485 (2-wire) for multi-drop networks; reserve RS-232 for single point-to-point connections\u003c\/li\u003e\n\u003cli\u003ePlan cable routing to keep each RS-485 segment under 1,200 meters for reliable 9600 bps operation\u003c\/li\u003e\n\u003cli\u003eFor installations near VFDs or welding equipment, use shielded cable with proper grounding\u003c\/li\u003e\n\u003cli\u003eOrder the conformal-coated variant for coastal, chemical, or wastewater treatment environments\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PROSOFT","offers":[{"title":"Default Title","offer_id":53776594305208,"sku":"MBTCP-MBS4","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/PLX31-EIP-MBS_1_1r180_d246ba2e-5360-46f5-a04d-21dba60e3913.png?v=1784182735","url":"https:\/\/www.globalpetroparts.com\/products\/plx31-mbtcp-mbs4-prosoft-modbus-tcp-ip-to-modbus-master-slave-gateway","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}