{"product_id":"prosoft-plx31-mbtcp-mbs4-modbus-tcp-ip-to-modbus-serial-4-port-gateway","title":"ProSoft PLX31-MBTCP-MBS4 Modbus TCP\/IP to Modbus Serial 4 Port Gateway","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eFacilitating seamless bidirectional communication between Ethernet and serial-based field networks, the ProSoft PLX31-MBTCP-MBS4 acts as a robust protocol converter for industrial automation systems. This module enables a Modbus TCP\/IP client or server to interface directly with up to four independent Modbus Serial networks, bridging the gap between legacy serial instruments and modern Ethernet control architectures. Engineered for high-reliability environments, it provides \u003cstrong\u003egalvanic isolation\u003c\/strong\u003e on all communication paths and features a rugged, compact enclosure designed for DIN-rail mounting. With integrated diagnostics, a flexible power supply input, and individual port configuration, this gateway ensures low-latency data transmission across diverse factory automation, water treatment, and power distribution infrastructures.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 20px;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eIndependent Serial Ports:\u003c\/strong\u003e Four fully isolated serial ports supporting RS-232, RS-422, or RS-485 physical layers.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eHigh Electrical Isolation:\u003c\/strong\u003e 2500 Vrms port-to-port and port-to-backplane signal isolation via digital RF modulation components.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eRobust Ethernet Interface:\u003c\/strong\u003e Single 10\/100 Mbps RJ45 port featuring 1500 Vrms electrical isolation and integrated broadcast storm resiliency.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eFlexible Power Input:\u003c\/strong\u003e Accepts a wide input range of 10 to 36 VDC, suitable for standard industrial 24 VDC control panels.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eDiagnostic Indicators:\u003c\/strong\u003e Front-panel LEDs provide immediate visual confirmation of power, module status, network activity, and serial transmission (TX\/RX) status.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 20px;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eIntegration of legacy Modbus RTU\/ASCII power meters, flowmeters, and protection relays into modern Ethernet-based SCADA systems.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eSubstation automation where high electrical isolation is necessary to prevent ground loops and protect centralized controller CPUs.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eDistributed water and wastewater monitoring setups requiring multi-point RS-485 serial networks linked to a centralized PLC over fiber or wireless Ethernet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eProSoft Technology\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eModel Reference\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003ePLX31-MBTCP-MBS4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003ePower Supply Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e24 VDC nominal (10 to 36 VDC permitted)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eCurrent Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e300 mA @ 24 VDC nominal (610 mA maximum @ 10 VDC)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eEthernet Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e1x 10\/100 Base-T RJ45 connector, half\/full-duplex auto-negotiation\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eEthernet Isolation\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e1500 Vrms (50 to 60 Hz for 60 seconds)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eSerial Interface Ports\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e4x isolated serial ports (RS-232, RS-422, or RS-485 configuration)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eSerial Port Isolation\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e2500 Vrms signal isolation (UL 1577 rated, RF modulation media)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e-25 to 70 degC (-13 to 158 degF)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eStorage Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e-40 to 80 degC (-40 to 176 degF)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eRelative Humidity\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e5% to 95% RH (non-condensing)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eShock Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eIEC 60068-2-27: 15G operational (11ms), 30G non-operational (18ms)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eVibration Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eIEC 60068-2-6: 5G @ 10 to 150 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eDimensions (H x W x D)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e13.67 x 5.05 x 11.13 cm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eShipping Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e2.5 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #e2e8f0;\"\u003e\n        \u003cth style=\"padding: 8px 12px; text-align: left; font-weight: bold;\"\u003ePort \/ Terminal Block\u003c\/th\u003e\n        \u003cth style=\"padding: 8px 12px; text-align: left; font-weight: bold;\"\u003eInterface Type\u003c\/th\u003e\n        \u003cth style=\"padding: 8px 12px; text-align: left; font-weight: bold;\"\u003eFunctional Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eEthernet Port\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eRJ45\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eModbus TCP\/IP Master (Client) \/ Slave (Server) connection\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eSerial Port 1 to 4\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eCombicon Terminal\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eModbus RTU\/ASCII Master or Slave (RS-232, RS-422, or RS-485 configuration)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003ePower Terminal\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003e3-Position Pluggable\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px 12px; border: 1px solid #e2e8f0;\"\u003eV+ (10 to 36 VDC), V- (DC Return), and Earth Ground\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe PLX31-MBTCP-MBS4 serves as a modernized replacement for older legacy gateways. When transitioning configuration profiles from previous-generation ProSoft modules, verify database memory mappings, as the internal database register structures may require offset realignment. Use the ProSoft Configuration Builder (PCB) software for smooth parameter migration.\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eA common issue during multi-port commissioning is Modbus TCP\/IP transaction timeouts caused by slower serial-side responses. Ensure that your Modbus TCP master poll timeout matches the longest potential serial round-trip time. When running RS-485 configurations with high slave counts or long cable distances, external 120-ohm termination resistors must be installed at both physical ends of the trunk to prevent signal reflections.\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe four serial interfaces feature specialized 2500 Vrms digital isolation chips. To maintain this high level of isolation performance, never share common reference or shield lines between different isolated ports or external power sources. For noisy VFD environments, utilize double-shielded twisted-pair (STP) cabling for all serial trunks and tie the cable shields directly to the cabinet ground at a single, centralized point.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 15px; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e De-energize all power lines before attempting to install, wire, or remove the gateway module. Touching live electrical terminations can lead to severe equipment damage, electrical shock, or physical injury. Ensure the internal system ground terminal is properly bonded to a low-impedance earth ground path before applying DC power.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eMount the gateway securely to an approved 35 mm DIN rail inside a protective NEMA or IP54 electrical enclosure, allowing at least 2 inches of clearance at the top and bottom for natural convective cooling.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eConfigure the internal physical serial port jumpers (underneath the front cover) to choose between RS-232, RS-422, or RS-485 modes for each of the four serial ports.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eConnect the isolated serial network cables to the corresponding pluggable Combicon terminal blocks, ensuring correct polarity of Transmit (TX) and Receive (RX) lines.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748;\"\u003eConnect the Ethernet network cable to the RJ45 port and apply nominal 24 VDC power to the power supply terminal block. Monitor the LED diagnostic indicators to confirm successful module initialization.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"ProSoft","offers":[{"title":"Default Title","offer_id":53076255900011,"sku":"PLX31-MBTCP-MBS4","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/plx31-mbtcp-mbs4-tpererizklq.jpg?v=1775727288","url":"https:\/\/www.plcprotech.com\/ru\/products\/prosoft-plx31-mbtcp-mbs4-modbus-tcp-ip-to-modbus-serial-4-port-gateway","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}