SIMATIC S7-1500 6ES7521-1BL00-0AB0 Digital Input PLC Module

Specification

6ES7521-1BL00-0AB0 is a DI 32x24VDC HF digital input module for SIMATIC S7-1500 SM 521. It has a 32-channel design, each 16 channels are a group, 2 dedicated high-speed counter channels, supports up to 6kHz frequency counting, and the minimum input delay is only 0.05ms.

Key Function

FAQ:

1. What is the wiring method of 6ES7521-1BL00-0AB0?

1. Adapted to a 40-pin front connector (screw type 6ES7590-1AE80-0AA0 / plug-in type 6ES7590-1AF30-0AA0), 32 channels are divided into 2 groups (16 channels each), each group has an independent common terminal, and supports sink/source universal wiring.
2. Terminal assignment: 1-16 = channels 0-15 (first group), 21-36 = channels 16-31 (second group); 19 = first group L+, 20 = first group M; 29 = second group L+, 40 = second group M; the rest are reserved terminals.
3. Power connection: The two groups can be powered independently (19/20 is connected to power supply 1, 29/40 is connected to power supply 2), or 19-29 and 20-40 can be short-circuited to achieve shared power supply.
4. Signal wiring: source type (sensor + is connected to the channel terminal, sensor – is connected to M of this group); sink type (sensor + is connected to L+ of this group, sensor – is connected to the channel terminal).
5. High-speed counting: Channel 0 (terminal 1) and 1 (terminal 2) are counting channels, connected to the first group of common terminals, up to 6kHz.
6. Key notes: Wiring should be well shielded to resist interference; inductive loads should be equipped with surge suppressors; hot plugging should cut off the load power supply first; the maximum current of each common terminal should be 20mA.

2.What is the maximum input frequency supported by 6ES7521-1BL00-0AB0?

1. Ordinary digital input: related to the input delay. When the minimum delay is 0.05ms, the theoretical maximum is about 10kHz (actually affected by module filtering and interference, it is usually designed to be stable at 5kHz).
2. High-speed counting channel (channel 0/1): supports up to 6kHz (32-bit counting), the counting mode needs to be configured in the TIA Portal, and is only adapted to the first group of common power supplies.

3.Can 6ES7521-1BL00-0AB0 directly replace 6ES7521-1BL10-0AA0?

6ES7521-1BL00-0AB0 cannot directly replace 6ES7521-1BL10-0AA0. There are physical, functional and accessory differences.

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