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Product description
For acquiring digital 24-V-DC signals, Siemens 6ES7521-1BL00-0AB0 provides a total of 32 inputs. The DI 32x24VDC HF High Feature module belongs to the SIMATIC S7-1500 and ET 200MP I/O range. The channels are arranged in two groups of 16 inputs and are electrically isolated between the groups. Switches and two-, three- and four-wire proximity switches can be connected. The input characteristic complies with IEC 61131 type 3. A rated 24 V DC supply operates within the specified range from 19.2 to 28.8 V. For standard signals, the input delay can be configured in seven steps between 0.05 and 20 ms. Channel 0 and channel 1 can alternatively operate as counters at up to 6 kHz with a 32-bit counting width. In addition to normal DI operation, the module supports MSI and isochronous mode. Diagnostic messages and hardware interrupts can be configured by channel. RUN, ERROR and PWR LEDs are provided together with green channel-status and red channel-diagnostic indicators. Diagnostic functions include supply-voltage monitoring and wire-break detection. Electrical isolation is also provided between the input channels and the backplane bus. At 35 × 147 × 129 mm, the module follows the narrow S7-1500 form factor; its approximate weight is 260 g. Typical power loss is 4.2 W, while power drawn from the backplane bus is 1.1 W. A front connector with screw or push-in terminals is selected separately. The complete order number, 32 input channels, HF functionality and configurable delay range distinguish this specific version.
Example image – The item supplied will have the stated manufacturer or type number and the stated condition category. Serial number, manufacturing date, labels, colour, packaging and normal signs of use or storage may differ. Specifications
| Manufacturer | Siemens |
|---|---|
| Product series | SIMATIC S7-1500 / ET 200MP |
| Manufacturer/order/identification number | 6ES7521-1BL00-0AB0 |
| Module type | DI 32x24VDC HF digital input module |
| Input channels | 32, in groups of 16 |
| Input voltage | 24 V DC; signal 0: -30 to +5 V; signal 1: +11 to +30 V |
| Supply range | 19.2 to 28.8 V DC |
| Input characteristic | IEC 61131, type 3 |
| Input delay | Configurable: 0.05 / 0.1 / 0.4 / 1.6 / 3.2 / 12.8 / 20 ms |
| Counter function | 2 channels, up to 6 kHz, 32 bit |
| Diagnostics | Configurable by channel; supply voltage and wire break |
| Hardware interrupts | Configurable by channel |
| Electrical isolation | Between channel groups and between channels and backplane bus |
| Typical power loss | 4.2 W |
| Backplane-bus power draw | 1.1 W |
| Dimensions | 35 × 147 × 129 mm (W × H × D) |
| Weight | approx. 260 g |
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How many inputs does Siemens 6ES7521-1BL00-0AB0 provide?
The module has 32 digital 24-V-DC inputs in two groups of 16 channels. Two inputs can alternatively be used as counters.
Which input delays can be configured?
Seven configurable steps from 0.05 to 20 ms are available for standard signals.
What applies if an item develops a defect within 14 days?
For the condition categories “Used, removed from an installation” and “New, old stock”, the contractual 14-day right of return in the event of a defect applies. The defect must occur within 14 calendar days after delivery and be reported in text form within the same period.
In particular, the REHA tamper-evident seal must remain fully intact and our RMA approval is required before return. In an accepted case, we decide between replacement and refund. Details in Section 11 of the Terms.
Which shipping methods and delivery times are available?
The shipping method, shipping cost and estimated delivery time are confirmed for the specific order. Depending on the item, destination and urgency, we can check parcel, express or freight shipping as well as collection.
A delivery date is binding only if we expressly confirm it as binding.
Which payment terms apply?
The payment terms stated in the checkout or order confirmation apply. Depending on the order and customer, payment is made in advance or against invoice.
International deliveries and deliveries to new customers are generally made against advance payment unless we expressly confirm another payment arrangement.
Can I return an item ordered incorrectly or found incompatible?
No. There is no general B2B right of return, exchange, cancellation or withdrawal. Incorrect or duplicate orders and a lack of suitability or compatibility with the customer’s installation are not covered by the contractual 14-day right of return in the event of a defect. Details in Section 12 of the Terms.
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