{"product_id":"ab-sst-esr2-cpx-p-serial-communication-module","title":"AB SST-ESR2-CPX-P Serial Communication Module","description":"\u003ch2\u003eAB SST-ESR2-CPX-P Serial Communication Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for serial data exchange in an Allen-Bradley ControlLogix chassis, the \u003cstrong\u003eAB SST-ESR2-CPX-P\u003c\/strong\u003e (\u003cstrong\u003eSST-ESR2-CPX-P\u003c\/strong\u003e Serial Communication Module) provides two configurable serial interfaces for Modbus and custom protocols.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\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\u003eSST-ESR2-CPX-P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAB \/ Molex Woodhead SST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eIn-Chassis Serial Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Platform\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley ControlLogix 1756 chassis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003e2 x serial ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interfaces\u003c\/td\u003e\n\u003ctd\u003eRS-232 \/ RS-422 \/ RS-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Protocols\u003c\/td\u003e\n\u003ctd\u003eModbus RTU, Modbus ASCII, Serial ASCII, custom serial protocols\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Mode\u003c\/td\u003e\n\u003ctd\u003eModbus Master \/ Slave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Baud Rate\u003c\/td\u003e\n\u003ctd\u003e115.2 kbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePort-to-Backplane Isolation\u003c\/td\u003e\n\u003ctd\u003e500 VDC optical isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Load\u003c\/td\u003e\n\u003ctd\u003e500 mA at 5 VDC; 5 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indicators\u003c\/td\u003e\n\u003ctd\u003eModule status, TX\/RX activity, network status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to 85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95%, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.40 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eBackplane load: 500 mA at 5 VDC; 5 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eControlLogix chassis, in-chassis installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eSerial Interface and Backplane Communication\u003c\/h3\u003e\n\u003cp\u003eThe SST-ESR2-CPX-P provides two serial ports configurable for RS-232, RS-422, or RS-485 operation.\u003cbr\u003eEach port supports selectable baud rates up to 115.2 kbps for external serial device communication.\u003cbr\u003eModbus RTU and Modbus ASCII operation supports Master or Slave configurations according to application requirements.\u003cbr\u003eSerial ASCII and custom serial protocols provide additional communication options for third-party equipment.\u003cbr\u003eThe module uses ControlLogix backplane communication to exchange data with the chassis processor.\u003cbr\u003eThe stated backplane load is 500 mA at 5 VDC and 5 mA at 24 VDC.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the two serial ports use different electrical interface modes?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The supplied data identifies RS-232, RS-422, and RS-485 as selectable interface modes, but does not specify port-specific configuration restrictions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What electrical isolation is provided by the module?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The supplied specification identifies 500 VDC optical isolation between the serial ports and the ControlLogix backplane.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What serial communication speed is supported?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Each serial port supports selectable baud rates up to 115.2 kbps.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module only in a compatible ControlLogix 1756 chassis with the chassis power removed during insertion or removal unless the system design explicitly permits energized servicing.\u003c\/p\u003e\n\u003cp\u003eVerify the selected RS-232, RS-422, or RS-485 interface configuration before connecting field wiring to each serial port.\u003c\/p\u003e\n\u003cp\u003eRoute serial communication cables separately from high-voltage conductors, motor cables, and high-current switching circuits to reduce electromagnetic interference.\u003c\/p\u003e\n\u003cp\u003eFor RS-485 and RS-422 networks, follow the applicable differential-pair wiring and termination practices specified by the connected device network.\u003c\/p\u003e\n\u003cp\u003eConnect cable shields according to the plant grounding architecture and equipment manufacturer's requirements. Avoid creating unintended shield current paths between separately grounded cabinets.\u003c\/p\u003e\n\u003cp\u003eConfirm that the total chassis power budget accommodates the module's specified backplane current load before installation.\u003c\/p\u003e\n\u003cp\u003eAfter installation, verify module status and TX\/RX indicators before commissioning protocol communication with the connected serial devices.\u003c\/p\u003e","brand":"AMPHENOL","offers":[{"title":"Default Title","offer_id":43969152024666,"sku":"SST-ESR2-CPX-P","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/SST-ESR2-CPX-P.jpg?v=1788162256","url":"https:\/\/www.plcmasters.com\/products\/ab-sst-esr2-cpx-p-serial-communication-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}