The Siemens SIMATIC S7-1500 digital input module, model 6ES7521-1BH10-0AA0, is a high-density I/O component engineered for demanding industrial automation applications. This module provides 16 digital inputs at 24V DC, offering both sink and source connectivity to accommodate a wide range of field devices. With its fast input delay times and integrated diagnostic capabilities—including wire-break detection and channel-level fault indication—the 6ES7521-1BH10-0AA0 ensures precise signal acquisition and minimizes downtime in critical processes. The module is designed for seamless integration into the S7-1500 backplane bus, supporting hot-swapping and firmware updates without disrupting system operation. Each input channel is electrically isolated in groups of eight, providing robust noise immunity and protection against transient overvoltages. The front connector interface accepts standard push-in terminals, simplifying wiring and reducing installation errors. This module is ideal for high-speed counting, position sensing, and safety interlocks in sectors such as automotive, packaging, and material handling. Below is the comprehensive technical specification table for the 6ES7521-1BH10-0AA0.
| Parameter |
Specification |
| Product Type |
Digital Input Module |
| Model Number |
6ES7521-1BH10-0AA0 |
| Number of Inputs |
16 |
| Input Type |
24V DC, Sink/Source (IEC 61131-2 Type 1/3) |
| Input Voltage Range |
20.4V to 28.8V DC (nominal 24V DC) |
| Input Current per Channel |
Typical 7 mA at 24V DC |
| Signal Level "0" |
-3V to +5V DC |
| Signal Level "1" |
+15V to +30V DC |
| Input Delay (Hardware) |
0.05 ms to 20 ms (configurable) |
| Isolation |
Optocoupler, group isolation (8 channels per group) |
| Diagnostics |
Channel fault, wire-break, short-circuit, and supply voltage monitoring |
| Backplane Bus Current Draw |
Typical 30 mA |
| Power Dissipation |
Typical 3.2 W |
| Operating Temperature |
0°C to +60°C (horizontal), 0°C to +40°C (vertical) |
| Storage Temperature |
-40°C to +70°C |
| Relative Humidity |
10% to 95% (non-condensing) |
| Protection Class |
IP20 (module only) |
| Dimensions (W x H x D) |
35 mm x 147 mm x 129 mm |
| Weight |
Approx. 220 g |
| Front Connector |
40-pin push-in type (supplied separately) |
| Certifications |
CE, cULus, ATEX (Zone 2), IECEx, Marine (DNV, GL, ABS) |
| Compatible Systems |
SIMATIC S7-1500, ET 200MP |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22