Sales and repairs of SIMATIC S7-1500 digital inputs
S7-1500 digital inputs – new, refurbished and repairs
We supply SIEMENS SIMATIC S7-1500 and ET 200MP digital input modules with 16, 32 or 64 inputs. This category includes modules for 24 V DC, 24–125 V UC and 230 V AC, BA and HF versions, fail-safe F-DI modules, NAMUR inputs and SIPLUS versions.
Have an order number? We will send you a quote within 1 hour.
Send us the complete order number, for example 6ES7521-, 6ES7526- or 6AG1521-..., and the required quantity. We will prepare an official quotation with price and delivery time, which we usually send within 1 hour. For a faulty module, we can also offer a repair.
More about S7-1500 digital inputs and how to choose them
SIEMENS SIMATIC S7-1500 digital input modules
Digital input modules transfer binary signals from sensors, push buttons, limit switches, relays and other devices to the PLC. Based on the input state, the PLC evaluates whether the relevant signal is active or inactive.
The S7-1500 range includes digital inputs for standard 24 V DC signals, higher voltage levels, safety applications and special NAMUR sensors. Individual modules differ in the number of channels, version, diagnostic functions and input signal processing speed.
Standard 24 V DC inputs
The most common modules are designed for standard 24 V DC binary signals. Versions with 16, 32 or 64 digital inputs are available.
Fail-safe F-DI inputs
F-DI fail-safe modules are designed for safety input signals, for example from emergency stop buttons, safety doors or light curtains, and communicate via PROFIsafe.
NAMUR digital inputs
Special DI NAMUR modules allow corresponding industrial NAMUR sensors to be connected and their diagnostic functions to be used.
24–125 V UC and 230 V AC inputs
Digital input modules for 24–125 V UC or 230 V AC are also available for applications using other voltage levels.
How to choose the right S7-1500 digital input module?
When replacing an existing module, the safest method is to use the complete SIEMENS order number. When selecting a different version, we recommend comparing in particular:
- number of digital inputs,
- input voltage and signal type,
- BA, HF or special version,
- processing speed and adjustable input delay,
- diagnostic functions of the module,
- requirements for safety functions and PROFIsafe,
- possible support for NAMUR sensors,
- compatibility with the hardware configuration in TIA Portal.
Typical SIMATIC S7-1500 digital input modules
| Order number | Module type | Type / application |
|---|---|---|
| 6ES7521-1BH00-0AB0 | DI 16x24 V DC HF | 16-channel 24 V DC digital input |
| 6ES7521-1BL00-0AB0 | DI 32x24 V DC HF | 32-channel 24 V DC digital input |
| 6ES7521-1BL10-0AA0 | DI 32x24 V DC BA | Standard 32-channel digital input |
| 6ES7521-1BP00-0AA0 | DI 64x24 V DC SNK/SRC BA | 64-channel digital input for a high number of signals |
| 6ES7526-1BH00-0AB0 | F-DI 16x24 V DC | Fail-safe digital input with PROFIsafe |
| 6ES7521-7TH00-0AB0 | DI 16xNAMUR HF | Digital input for NAMUR sensors |
New and refurbished digital input modules from stock
For current SIMATIC S7-1500 digital input modules, we primarily check the availability of a new original SIEMENS part. We use an extensive European warehouse network with more than 900,000 industrial spare parts.
This also enables us to source refurbished, older, obsolete or hard-to-find digital input modules. If you cannot find a specific order number in the e-shop, send it to us and we will prepare a quotation with price and delivery time.
Repairs of SIEMENS SIMATIC S7-1500 digital input modules
If you have a faulty digital input module, you can send it to us for diagnostics and repair. Repairs are carried out in specialised repair centres in Europe with which we have established long-term cooperation.
These repair centres specialise in industrial electronics and repaired modules are functionally tested before being returned to the customer.
SIPLUS S7-1500 digital inputs
Selected SIPLUS S7-1500 versions are also available for applications operating under more demanding environmental conditions. You can find them in a separate SIPLUS digital inputs subcategory.
Frequently asked questions
Yes. Ideally, send us the complete SIEMENS order number from the nameplate, for example 6ES7521-1BL00-0AB0, and the required quantity. We will prepare a quotation with price and delivery time, usually within 1 hour.
Yes. We also check other digital input modules in European warehouses. Send us the order number and we will prepare a quotation based on current availability.
Yes. You can send the faulty module to FOXON. We will arrange diagnostics, repair and subsequent functional testing at a specialised European repair centre with which we have long-term cooperation.
Not always. The number of inputs, input voltage, signal type, diagnostic and safety functions and hardware configuration in TIA Portal must be checked.
The versions differ in technical parameters, diagnostic options and functions. When replacing a module, we recommend using the exact order number of the original module and checking its configuration in TIA Portal.
Yes. The S7-1500 range includes F-DI modules for safety-related input signals and PROFIsafe communication.
6ES7 552-5HH00-0AB0
6ES7 521-1BL10-0AA0
6ES7521-1BP00-0AA0
6ES7526-1BH00-0AB0
6ES7521-7EH00-0AB0
6ES7521-1FH00-0AA0
6ES7521-1BL10-0AA0
6ES7521-1BL00-0AB0
6ES7521-1BH50-0AA0
6ES7521-1BH10-0AA0
6ES7521-1BH00-0AB0
6ES7521-7TH00-0AB0
6ES7521-7BH00-0AB0
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