{"product_id":"siemens-6es7241-1ca50-0xb0-cb-1241-rs485-board","title":"Siemens 6ES7241-1CA50-0XB0 SIMATIC S7-1200 CB 1241 RS485 Communication Board","description":"\u003cp\u003eThe Siemens 6ES7241-1CA50-0XB0 SIMATIC S7-1200 CB 1241 is a communication board that adds one RS 485 interface to a compact CPU, supporting Freeport, ASCII, Modbus RTU master\/device, and USS protocols at up to 250 kbit\/s. It draws 75 mA from the backplane bus and connects over point-to-point cable runs up to 1000 m.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6ES7241-1CA50-0XB0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S7-1200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCB 1241 RS 485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Current, typ.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e75 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Loss, typ.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1x RS 485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission Rate, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 kbit\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePoint-to-Point Cable Length, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 000 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntegrated Protocols\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreeport, ASCII, Modbus RTU master, Modbus RTU device, USS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFreeport Telegram Length, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 kbyte\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModbus RTU Master Devices, max.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e247 (32 per segment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIP Degree of Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature, vertical install\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 to 50 C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions (W x H x D)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 x 62 x 63 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e29 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eCertifications \u0026amp; Standards\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCE\u003c\/li\u003e\n\u003cli\u003eUL\u003c\/li\u003e\n\u003cli\u003ecULus\u003c\/li\u003e\n\u003cli\u003eRCM\u003c\/li\u003e\n\u003cli\u003eKC\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eThe CB 1241 plugs into the S7-1200 CPU's onboard communication board slot rather than a rack expansion position, adding RS 485 connectivity without using up a signal-module slot. In Modbus RTU master mode the CPU can poll up to 247 slave devices under standard Modbus addressing, with a maximum of 32 devices per physical segment before a repeater is required; Modbus RTU device mode instead lets another master poll this CPU. The USS protocol, available as a library function, is the relevant mode when the RS 485 link talks to Siemens drives rather than third-party Modbus instruments.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eAdds RS 485 serial connectivity to an S7-1200 for Modbus RTU instrument networks, USS-based drive control loops, or Freeport ASCII communication with third-party serial devices.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960782709019,"sku":"6ES7241-1CA50-0XB0","price":116.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7241-1ca50-0xb0-cb1241-rs485-communication-board.png?v=1789663893","url":"https:\/\/stoklink.com\/products\/siemens-6es7241-1ca50-0xb0-cb-1241-rs485-board","provider":"Stoklink","version":"1.0","type":"link"}