{"product_id":"allen-bradley-1771-ws-weigh-scale-module-plc-5-series","title":"Allen-Bradley 1771-WS Weigh Scale Module PLC-5 Series","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1771-WS\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1771WS\u003c\/strong\u003e Weigh Scale Module, operates as a dedicated hardware component for single-vessel strain gauge signal acquisition and millivolt conversion within PLC-5 1771 I\/O rack architectures.\u003c\/p\u003e\n\u003ch3\u003eRevision Index \u0026amp; Hardware Variants\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Catalog Number\u003c\/strong\u003e: 1771-WS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate Spare Identifier\u003c\/strong\u003e: 1771WS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware Revision Code\u003c\/strong\u003e: 1771-WS\/B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchitecture Line\u003c\/strong\u003e: PLC-5 1771 System\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eElectrical \u0026amp; Environmental Attributes\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003e1771-WS \/ 1771-WS\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.74 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.0 x 15.2 x 25.8 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Input Range\u003c\/td\u003e\n\u003ctd\u003e0 to 30 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e1 Channel (Single Vessel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Rating\u003c\/td\u003e\n\u003ctd\u003e1.5 A @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e7.5 W (1.5 A @ 5 VDC Nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8538903000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Signal Processing \u0026amp; Backplane Bus Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1771-WS converts 0 to 30 mV load cell bridge signals into digitized weight data, updating the 1771 backplane logic table via block transfer commands. Maintaining high backplane bus communication velocity allows rapid weight data throughput across multi-slot chassis setups while ensuring firmware flash compatibility across legacy and upgraded PLC-5 processors.\u003c\/p\u003e\n\u003ch3\u003eSupply Package Scope\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x 1771-WS Single Vessel Weigh Scale Module\u003c\/li\u003e\n\u003cli\u003e1 x Technical Installation Datasheet Sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Wiring Protocols \u0026amp; Mounting Rules\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Isolation\u003c\/strong\u003e: Turn off main chassis backplane power prior to inserting or removing the 1771-WS card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Shielding\u003c\/strong\u003e: Use shielded twisted-pair cabling for 0 to 30 mV load cell wiring, running cables in isolated conduits to suppress EMI.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding Compliance\u003c\/strong\u003e: Earth the cable shields at the enclosure single-point ground bar to maintain signal resolution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What load cell input range is supported by the 1771-WS module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module converts full-scale analog millivolt input signals ranging from 0 to 30 mV directly from strain gauge bridges.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the backplane current draw on the 5 VDC bus line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit draws a nominal 1.5 A from the 1771 backplane 5 VDC supply rail during continuous operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many vessel channels can one 1771-WS card monitor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1771-WS is structured to interface with a single vessel weighing system across its 1 signal channel.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the 1771-WS module be seated while the chassis power is active?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, power to the 1771 chassis must be disconnected prior to seating or removing the module to prevent electrical damage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does the spare designation 1771-WS\/B signify?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe code 1771-WS\/B indicates the Series B hardware revision update for the baseline 1771-WS weigh scale module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the weight data transfer from the module to the PLC-5 processor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eData transfers across the 1771 backplane bus using standard block transfer read and block transfer write instruction routines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the estimated shipping weight and physical size of the unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module weighs 0.74 kg with package shipping dimensions measuring approximately 3.0 x 15.2 x 25.8 cm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What ambient temperature envelope is required for enclosure installation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe module operates reliably within a standard operating ambient enclosure temperature range of 0 to 60 deg C.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066444533933,"sku":"1771-WS","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1771-WS_1.jpg?v=1786543304","url":"https:\/\/www.maxwellplc.com\/ru\/products\/allen-bradley-1771-ws-weigh-scale-module-plc-5-series","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}