Products for Totally Integrated Automation and Micro ... - Siemens

© Siemens AG 2010SIMATIC S7-1200Digital modules■ Overview• Digital inputs as supplement to the integral I/O of the CPUs• For flexible adaptation of the controller to the relevant task• For subsequent expansion of the system with additional inputsSM 1221 digital input module■ ApplicationDigital input modules allow the connection of the controller todigital signals of the process.This provides users with the following advantages:• Optimum adaptation:With signal modules which can be mixed as desired, userscan adapt their controllers exactly to the relevant task. Thisavoids superfluous investments. Modules with 8, 16, and 32input/output channels are available.• Flexibility:If the task is expanded subsequently, the controller can be upgraded.Updating of the user program is extremely simple.■ FunctionThe SM 1221 digital input signal modules convert the level of theexternal digital signals from the process into the internal signallevel of the S7-1200.4■ Technical specifications6ES7 221-1BF30-0XB0Product type designation SM 1221DI 8x24 V DCSupply voltagesRated value6ES7 221-1BH30-0XB0SM 1221DI 16x24 V DC• 24 V DC Yes Yes• permissible range, 20.4 V 20.4 Vlower limit (DC)• permissible range, 28.8 V 28.8 Vupper limit (DC)Power supply to the transmitters• present Yes YesCurrent consumptionfrom backplane bus 5 V DC, 105 mA 130 mAmax.Digital inputs• from load voltage L+ 4 mA; per channel 4 mA; per channel(without load), max.Power lossPower loss, typ. 1.5 W 2.5 WConnection methodrequired front connector Yes YesDigital inputsNumber of digital inputs 8 16• in groups of 2 4Number of simultaneouslycontrollable inputs• all mounting positions- Concurrently controllable 8 16inputs, up to 40 °C6ES7 221-1BF30-0XB0Product type designation SM 1221DI 8x24 V DCNumber of simultaneouslycontrollable inputs6ES7 221-1BH30-0XB0SM 1221DI 16x24 V DC• horizontal installation- up to 40 °C, max. 8 16- up to 50 °C, max. 8 16• vertical installation- up to 40 °C, max. 8 16Input characteristic curve YesYesacc. to IEC 1131, Type 1Input voltage• Rated value, DC 24 V 24 V• for signal "0" 5 V DC at 1 mA 5 V DC at 1 mA• for signal "1" 15 V DC at 2.5 mA 15 V DC at 2.5 mAInput current• for signal "0", max. 1mA1mA(permissible quiescentcurrent)• for signal "1", min. 2.5 mA 2.5 mA• for signal "1", typ. 4 mA; Typical 4 mA; TypicalInput delay (for rated valueof input voltage)• for standard inputs- parameterizable Yes; 0.2, 0.4, 0.8,1.6, 3.2, 6.4, and12.8 ms, selectablein groups of four• for interrupt inputs- parameterizable Yes YesYes; 0.2, 0.4, 0.8,1.6, 3.2, 6.4, and12.8 ms, selectablein groups of fourSiemens ST 70 N · 20104/41