Siemens 6ES7521-1BL00-0AB0 – SIMATIC S7-1500 Digital Input Module DI 32x24VDC HF, In Stock
Buy the Siemens 6ES7521-1BL00-0AB0, a SIMATIC S7-1500 digital input module with 32 channels in groups of 16, 2 of which can be used as counters. Input type 3 (IEC 61131), with diagnostics and hardware interrupts. Front connector ordered separately. In stock and ready for fast shipping. Get a quote today.
Key Technical Specifications
- Product Type: DI 32x24VDC HF
- Firmware Version: V2.2.1
- Number of Digital Inputs: 32, in groups of 16
- Input Type: Source/sink (P-reading), IEC 61131 Type 3
- Rated Input Voltage: 24 V DC (0/1 signal thresholds: -30 to +5 V / +11 to +30 V)
- Input Current (Signal “1”): 2.5 mA typical
- Input Delay: Parameterizable — 0.05/0.1/0.4/1.6/3.2/12.8/20 ms
- Counter Function: Up to 2 inputs, max. 6 kHz, 32-bit counting width, up-counting
- Isochronous Mode: Yes; min. filtering/processing time 80 µs, min. bus cycle time 250 µs
- Supply Voltage: 24 V DC, permissible range 19.2–28.8 V DC, reverse polarity protected
- Current Consumption: 40 mA max. (20 mA per group)
- Power Loss: 4.2 W typical
- Cable Length: Max. 1,000 m shielded; max. 600 m unshielded
- Diagnostics: Diagnostic alarm, hardware interrupt, supply voltage monitoring, wire-break (<350 µA)
- Diagnostic LEDs: RUN, ERROR, PWR, channel status, channel/module diagnostics
- Potential Separation: Between channels (groups of 16) and backplane bus; isolation tested at 707 V DC
- Ambient Temperature: -30 °C to 60 °C (horizontal); -30 °C to 40 °C (vertical)
- Dimensions (W x H x D): 35 x 147 x 129 mm
- Weight: Approx. 260 g
Design and Performance
High-Density Digital Input for Demanding Applications
Packs 32 digital inputs into a single module, grouped in 16s, providing high I/O density for SIMATIC S7-1500 stations with substantial digital signal requirements.
Built-In High-Speed Counting
Two of the 32 inputs can be configured as counters with up to 6 kHz counting frequency and 32-bit counting width, enabling basic pulse counting applications without a dedicated technology module.
Deterministic, Isochronous-Capable Operation
Supports isochronous mode with a minimum bus cycle time of 250 µs, allowing tightly synchronized data acquisition for time-critical process and motion control applications.
Configurable Response Time
Parameterizable input delay from 0.05 ms to 20 ms lets engineers balance signal noise immunity against response speed, adaptable per application on standard, interrupt, and technological function inputs.
Comprehensive Diagnostics and Fast Fault Detection
Diagnostic alarms, hardware interrupts, supply voltage monitoring, and wire-break detection (below 350 µA), backed by dedicated RUN, ERROR, PWR, and per-channel diagnostic LEDs, support fast troubleshooting and reduced downtime.
Wide Environmental Range
Rated for -30 °C to 60 °C horizontal operation and installation altitudes up to 5,000 m, the module supports deployment across demanding industrial environments within the SIMATIC S7-1500 system.
Why Buy the 6ES7521-1BL00-0AB0 From Us
- In stock and ready for immediate dispatch
- Fast shipping on every order
- Commercial advisory support to help you confirm compatibility with your SIMATIC S7-1500 CPU
- Competitive pricing — get a quote in minutes
