{"product_id":"siemens-6es7521-1bh00-0ab0-s7-1500-di-16x24vdc-hf","title":"Siemens 6ES7521-1BH00-0AB0 SIMATIC S7-1500 DI 16x24VDC HF Digital Input Module","description":"\u003cp\u003eThe Siemens 6ES7521-1BH00-0AB0 is a SIMATIC S7-1500 DI 16x24VDC HF digital input module with 16 channels in one group, 2 of which can run as counters up to 6 kHz. Input delay is parameterizable from 0.05 to 20 ms per IEC 61131 type 3. It draws up to 20 mA from a 24 V DC supply and reports wire-break and short-circuit diagnostics.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e6ES7521-1BH00-0AB0\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 S7-1500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type Designation\u003c\/td\u003e\n\u003ctd\u003eDI 16x24VDC HF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirmware Version\u003c\/td\u003e\n\u003ctd\u003eV2.2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC (19.2-28.8 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e20 mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Inputs\u003c\/td\u003e\n\u003ctd\u003e16, in groups of 16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Type\u003c\/td\u003e\n\u003ctd\u003eIEC 61131 Type 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Delay\u003c\/td\u003e\n\u003ctd\u003e0.05-20 ms, parameterizable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounter Function\u003c\/td\u003e\n\u003ctd\u003e2 channels, 32-bit, up to 6 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e1000 m shielded \/ 600 m unshielded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsochronous Mode\u003c\/td\u003e\n\u003ctd\u003eTCI min 80 µs, TDP min 250 µs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Loss\u003c\/td\u003e\n\u003ctd\u003e2.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmbient Temperature\u003c\/td\u003e\n\u003ctd\u003e-30 to 60°C horizontal, -30 to 40°C vertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x H x D)\u003c\/td\u003e\n\u003ctd\u003e35 x 147 x 129 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e240 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront Connector\u003c\/td\u003e\n\u003ctd\u003eOrdered separately (screw or push-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eSelection Notes\u003c\/h2\u003e\u003cp\u003eAt 16 channels the DI 16x24VDC HF is the lower-density counterpart to the DI 32x24VDC HF in the same 35 mm housing footprint — pick this one when the input count for a segment is under 16 and rack space is not the constraint, since the per-channel cost is otherwise similar. Two of the 16 channels double as 32-bit up-counters to 6 kHz, useful for basic flow or pulse counting without a dedicated high-speed counter module. Wire-break detection to below 350 µA flags an open field circuit at the module level, useful for safety-adjacent digital inputs like guard switches even though this module itself is not fail-safe rated.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits S7-1500 stations needing moderate digital input counts with basic pulse-counting capability — machine interlocks, sensor banks, and general discrete field wiring.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":53960646263067,"sku":"6ES7521-1BH00-0AB0","price":279.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/7722\/4475\/files\/siemens-6es7521-1bh00-0ab0-s7-1500-di-16x24vdc-hf.png?v=1789663485","url":"https:\/\/stoklink.com\/products\/siemens-6es7521-1bh00-0ab0-s7-1500-di-16x24vdc-hf","provider":"Stoklink","version":"1.0","type":"link"}