{"product_id":"siemens-6es7321-7rd00-0ab0-sm321-4di-namur-ex","title":"Siemens 6ES7321-7RD00-0AB0 SIMATIC S7-300 SM 321 4xDI NAMUR Ex Hazardous Area PLC I\/O Module","description":"\u003cp\u003eThe Siemens 6ES7321-7RD00-0AB0 is a SIMATIC S7-300 SM 321 digital input module with 4 isolated NAMUR inputs per DIN 19234, built to bring signals from a hazardous area into the control system. It runs from an internal 8.2 V DC supply circuit, is PTB tested under number Ex-96.D.2094X, and carries an ATEX II 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc marking.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eCatalog No \/ SKU\u003c\/td\u003e\n\u003ctd\u003e6ES7321-7RD00-0AB0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S7-300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eSM 321 digital input module, isolated, NAMUR \/ DIN 19234, for hazardous-area signals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad voltage L+\u003c\/td\u003e\n\u003ctd\u003e24 V DC, reverse polarity protected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent consumption from L+ (no load), max.\u003c\/td\u003e\n\u003ctd\u003e50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent consumption from backplane bus (5 V DC), max.\u003c\/td\u003e\n\u003ctd\u003e80 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower loss, typ.\u003c\/td\u003e\n\u003ctd\u003e1.1 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital inputs\u003c\/td\u003e\n\u003ctd\u003e4, NAMUR type, 2-wire connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput voltage (rated, internal circuit)\u003c\/td\u003e\n\u003ctd\u003e8.2 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal 0 current (NAMUR)\u003c\/td\u003e\n\u003ctd\u003e0.35 to 1.2 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal 1 current (NAMUR)\u003c\/td\u003e\n\u003ctd\u003e2.1 to 7 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput frequency, max. (0.1 ms delay)\u003c\/td\u003e\n\u003ctd\u003e2 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput delay, parameterizable\u003c\/td\u003e\n\u003ctd\u003e0.1 \/ 0.5 \/ 3 \/ 15 \/ 20 ms (plus 0.25 ms preparation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable length, unshielded, max.\u003c\/td\u003e\n\u003ctd\u003e200 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEx(i) gas group IIC limits\u003c\/td\u003e\n\u003ctd\u003eUo 10 V, Io 14.1 mA, Po 33.7 mW, Co 3 microF, Lo 100 mH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotential separation (channels \/ backplane \/ L+)\u003c\/td\u003e\n\u003ctd\u003e60 V DC\/30 V AC in hazardous area; 400 V DC\/250 V AC in non-hazardous area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eATEX marking\u003c\/td\u003e\n\u003ctd\u003eII 3 G (2) GD Ex nA [ib Gb] [ib IIIC Db] IIC T4 Gc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFM marking\u003c\/td\u003e\n\u003ctd\u003eClass II, Division 2, Group A, B, C, D T4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePTB test number\u003c\/td\u003e\n\u003ctd\u003eEx-96.D.2094X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient temperature, operation, max.\u003c\/td\u003e\n\u003ctd\u003e60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection method\u003c\/td\u003e\n\u003ctd\u003e20-pin front connector required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x H x D)\u003c\/td\u003e\n\u003ctd\u003e40 x 125 x 120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight\u003c\/td\u003e\n\u003ctd\u003e0.34 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eThe NAMUR two-wire interface distinguishes signal states by current draw (0.35-1.2 mA for signal 0, 2.1-7 mA for signal 1) rather than voltage, which is what lets this module read proximity switches and sensors mounted inside the classified area itself. Its Ex(i) limits (Uo 10 V, Io 14.1 mA, Po 33.7 mW) size the loop for gas group IIC — the tightest of the standard groups — so it also covers IIB and IIA installations. The parameterizable 0.1-20 ms input delay lets a project trade noise immunity against response speed per channel group, which matters when some inputs are fast limit switches and others are slower level sensors on the same module.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960576336155,"sku":"6ES7321-7RD00-0AB0","price":785.52,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7321-7rd00-0ab0-sm321-4di-namur-ex.png?v=1789781891","url":"https:\/\/stoklink.com\/products\/siemens-6es7321-7rd00-0ab0-sm321-4di-namur-ex","provider":"Stoklink","version":"1.0","type":"link"}