6ES7521-1BL00-0AB0 Overview

The Siemens Simatic S7 6ES7521-1BL00-0AB0 is a high-function digital input module with 32 channels, isolated in groups of 16. It features 24V DC rated input, configurable delays, diagnostics, and supports counter functions on two channels for flexible industrial applications.

Technical Properties

• 32 digital inputs; electrically isolated in groups of 16 – of which channel 0 and 1 optionally with counter function

• Rated input voltage 24 V DC

• Configurable input delay: 0.05 ms to 20 ms

• Configurable diagnostics (per channel)

• Configurable hardware interrupt (per channel)

• Suitable for switches and 2-/3-/4-wire proximity switches

• Hardware compatible with digital input module DI 16x24VDC HF

FAQ

Q: How many digital input channels does the Siemens 6ES7521-1BL00-0AB0 module have?

A: It provides 32 digital input channels, which are electrically isolated in groups of 16.

Q: Does the module support specialized functions like counting?

A: Yes, channels 0 and 1 can optionally be configured for counter functions.

Q: What input voltage is this module rated for?

A: It operates at a rated input voltage of 24 V DC.

Q: What configurable diagnostic features are available?

A: The module supports configurable diagnostics and hardware interrupts on a per-channel basis.

Q: Is this module compatible with other Siemens digital input modules?

A: Yes, it is hardware-compatible with the digital input module DI 16x24VDC HF (6ES7521-1BH00-0AB0).