{"product_id":"prosoft-mv156-mcmr-modbus-master-slave-communication-module","title":"ProSoft MV156-MCMR Modbus Master\/Slave Communication Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eInterfacing directly with the system backplane, the \u003cstrong\u003eProSoft MV156-MCMR\u003c\/strong\u003e operates as a highly integrated Modbus Master\/Slave communication interface module. This module enables serial communication with various industrial control devices, functioning as either a Master or a Slave across independent serial ports. Designed to optimize bandwidth in distributed control networks, the \u003cstrong\u003eProSoft MV156-MCMR\u003c\/strong\u003e implements a reduced data block transfer structure, which is ideal for remote I\/O configurations or networks with constrained throughput. The module natively manages data transfers, floating-point math scaling, and error checking directly within its onboard processing unit, minimizing processing overhead on the host controller.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eDual Independent Serial Ports:\u003c\/strong\u003e Each port is configurable as a Modbus Master or Slave, supporting RS-232, RS-422, or RS-485 physical layer interfaces.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eReduced Block Transfer:\u003c\/strong\u003e Optimized for remote racks or lower-bandwidth communication links by using smaller block transfer configurations.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eComprehensive Protocol Modes:\u003c\/strong\u003e Full compatibility with Modbus RTU (binary with CRC-16) and Modbus ASCII (with LRC error checking) transmission modes.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eSpecialized Floating-Point Integration:\u003c\/strong\u003e Configurable support for specialized floating-point data parsing, including Enron, Daniel, and standard IEEE formats.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eReal-Time Diagnostics:\u003c\/strong\u003e Dynamic visual feedback via front-facing LEDs tracking backplane data transfer, serial port activity, and module health.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eTypical Applications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eSCADA and Human-Machine Interface (HMI) coordination across distant terminal sites.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eIntegration of flow computers, power monitors, and gas chromatographs in petro-chemical installations.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eDistributed Variable Frequency Drive (VFD) and motor protection relay tracking in MCC panels.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eBuilding automation and sub-metering infrastructure aggregation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\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    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #1a365d;\"\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold; color: #1a365d;\"\u003eSpecification Parameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 0.5rem; font-weight: bold; color: #1a365d;\"\u003eValue \/ Details\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eProSoft Technology\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eMV156-MCMR\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eBackplane Current Draw\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e800 mA at 5 Vdc, 3 mA at 24 Vdc\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0 to 60 degC (32 to 140 degF)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eStorage Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e-40 to 85 degC (-40 to 185 degF)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eRelative Humidity\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e5% to 95% (non-condensing)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eVibrational Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e5 g from 10 Hz to 150 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eOperational Shock\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e30 g operational, 50 g non-operational\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eSupported Baud Rates\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e110 to 115,200 baud\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eData Bits\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e7 or 8 bits\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eParity Selection\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003eNone, Odd, Even\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eStop Bits\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e1 or 2\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eRTS Timing Delays\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e0 to 65535 milliseconds\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.5rem;\"\u003e1.5 kg (3.3 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe \u003cstrong\u003eMV156-MCMR\u003c\/strong\u003e is functionally optimized to replace standard high-block-size modules in architectures where backplane memory bandwidth is highly constrained. While the traditional MVI56-MCM uses larger transfer blocks, the \u003cstrong\u003eMCMR\u003c\/strong\u003e variant relies on a reduced, adjustable block design to fit tight network frames. Ensure that the configuration blocks mapped in your ladder logic block layout are adjusted to match the MCMR block sizes to prevent processing faults during system retrofits.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen operating at high baud rates (e.g., 115,200 baud) or under heavy packet loading, thermal dissipation within enclosed control panels must be addressed. Ensure adjacent slots provide sufficient passive convection. Additionally, when using Enron\/Daniel floating-point modes, verification of the byte-swapping order is necessary to prevent data truncation or alignment mismatches between the controller memory structure and the external field device.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1.5rem;\"\u003eFor RS-485 daisy-chained communication loops, a termination resistor (120-ohm) must be connected across the TX\/RX+ and TX\/RX- terminals of the physical end-of-line units. To mitigate electromagnetic interference and shield noise issues, the communication cable shield must be grounded at exactly one physical location in the network loop—preferably at the controller rack termination point.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; border-bottom: 1px solid #2b6cb0; padding-bottom: 0.25rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 0.5rem;\"\u003eCRITICAL WARNING:\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0;\"\u003eIsolate and completely shut down all electrical power to the system chassis before inserting, adjusting, or extracting the communication module. Performing hot-swapping or handling live components risks severe physical backplane damage, electrical shock, and communication failures on the remaining active nodes.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; min-width: 2rem; font-weight: bold; margin-right: 1rem;\"\u003e1\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 0.25rem;\"\u003eTurn off all power feeding the system chassis and associated communication field networks.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; min-width: 2rem; font-weight: bold; margin-right: 1rem;\"\u003e2\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 0.25rem;\"\u003eAlign the module carefully with the slot guide rails, keeping it perpendicular to the chassis backplane.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; min-width: 2rem; font-weight: bold; margin-right: 1rem;\"\u003e3\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 0.25rem;\"\u003eFirmly slide the module forward until it seats completely into the backplane connectors, then tighten the retaining screws to lock it into position.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 2rem; height: 2rem; min-width: 2rem; font-weight: bold; margin-right: 1rem;\"\u003e4\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748; padding-top: 0.25rem;\"\u003eConnect the serial terminal blocks, power on the chassis, and check the front-panel status LEDs for normal initialization.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ProSoft","offers":[{"title":"Default Title","offer_id":53076256489835,"sku":"MV156-MCMR","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/MV156-MCMR-gwxsztzlpjo.jpg?v=1775727248","url":"https:\/\/www.plcprotech.com\/ms\/products\/prosoft-mv156-mcmr-modbus-master-slave-communication-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}