{"product_id":"allen-bradley-1785-pfb-plc-5-series-profibus-module","title":"Allen-Bradley 1785-PFB PLC-5 Series Profibus Module","description":"\u003cp\u003eConfigured for PROFIBUS FMS\/DP communication processing in PLC-5 control systems, the \u003cstrong\u003eAllen-Bradley 1785-PFB\u003c\/strong\u003e (\u003cstrong\u003e1785-PFB\u003c\/strong\u003e Profibus Module) provides direct communication execution between PLC-5 backplane architecture and PROFIBUS network devices.\u003c\/p\u003e\n\u003ch3\u003eModel Identification\u003c\/h3\u003e\n\u003cfigure class=\"table\"\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\u003e1785-PFB\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eProfibus Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003ePROFIBUS FMS\/DP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003e9.6 kbps to 12 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e5 VDC from PLC-5 backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Draw\u003c\/td\u003e\n\u003ctd\u003e800 mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e1500 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.36 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e4.8 x 16.5 x 26.8 cm\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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e800 mA typical at 5 VDC backplane supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHardware Configuration Details\u003c\/h3\u003e\n\u003cp\u003eThe 1785-PFB is a PLC-5 coprocessor module designed to add PROFIBUS communication capability to PLC-5 controller systems. The module receives operating power directly from the PLC-5 chassis backplane and exchanges communication data through the PROFIBUS interface.\u003c\/p\u003e\n\u003cp\u003eThe module supports PROFIBUS FMS and DP communication modes with selectable communication speeds from 9.6 kbps to 12 Mbps. Electrical isolation between communication circuitry and control system components is provided through the specified isolation voltage rating.\u003c\/p\u003e\n\u003ch3\u003ePLC-5 Network Communication Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1785-PFB operates as a dedicated communication interface within PLC-5 platforms. The module handles PROFIBUS data exchange while maintaining PLC-5 backplane communication processes.\u003c\/p\u003e\n\u003cp\u003eAllen-Bradley PLC-5 systems use modular backplane communication architecture. The 1785-PFB expands I\/O and communication capability by integrating PROFIBUS connectivity without changing the existing PLC processor structure.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1785-PFB PROFIBUS Coprocessor Module\u003c\/li\u003e\n\u003cli\u003eCompatible with Allen-Bradley PLC-5 controller chassis systems\u003c\/li\u003e\n\u003cli\u003ePROFIBUS FMS\/DP communication interface included\u003c\/li\u003e\n\u003cli\u003e5 VDC backplane power interface included\u003c\/li\u003e\n\u003cli\u003eNo external power supply required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eModule Mounting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module in a compatible PLC-5 chassis slot.\u003c\/li\u003e\n\u003cli\u003eVerify chassis power is removed before module insertion or removal.\u003c\/li\u003e\n\u003cli\u003eConfirm backplane connectors are clean and properly aligned.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommunication Wiring\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse PROFIBUS-compatible cabling and connectors for network installation.\u003c\/li\u003e\n\u003cli\u003eMaintain cable separation from high-voltage power wiring.\u003c\/li\u003e\n\u003cli\u003eApply proper grounding and shielding practices for communication cable systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSystem Integration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVerify PROFIBUS baud rate settings match connected devices.\u003c\/li\u003e\n\u003cli\u003eConfirm PLC-5 processor configuration supports the installed communication module.\u003c\/li\u003e\n\u003cli\u003eCheck network termination requirements according to PROFIBUS installation standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eWhat controller platform is compatible with the 1785-PFB?\u003c\/p\u003e\n\u003cp\u003eThe 1785-PFB is designed for Allen-Bradley PLC-5 control systems and installs through the PLC-5 chassis backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhich communication protocols are supported?\u003c\/p\u003e\n\u003cp\u003eThe module supports PROFIBUS FMS and PROFIBUS DP communication functions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow is the module powered?\u003c\/p\u003e\n\u003cp\u003eThe 1785-PFB receives 5 VDC operating power directly from the PLC-5 backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat PROFIBUS speed range is supported?\u003c\/p\u003e\n\u003cp\u003eThe communication data rate range is 9.6 kbps to 12 Mbps depending on network configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the module require separate firmware configuration?\u003c\/p\u003e\n\u003cp\u003eConfiguration depends on PLC-5 system setup and PROFIBUS network parameters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat is the typical current consumption?\u003c\/p\u003e\n\u003cp\u003eThe module draws approximately 800 mA from the PLC-5 backplane supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan the module operate outside the specified temperature range?\u003c\/p\u003e\n\u003cp\u003eOperation should remain within the specified 0 deg C to +60 deg C environmental range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs electrical isolation provided?\u003c\/p\u003e\n\u003cp\u003eThe module includes an isolation voltage specification of 1500 V AC between applicable circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066452496557,"sku":"1785-PFB\/B","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1785-PFB_1.jpg?v=1785853667","url":"https:\/\/www.maxwellplc.com\/products\/allen-bradley-1785-pfb-plc-5-series-profibus-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}