Siemens SIMATIC S7-1500 Automation System

Module overview
3.2 Digital input modules
S7-1500 Automation System
22 System Manual, 01/2013, A5E03461182-01
3.2 Digital input modules
Overview of properties
The table below shows the essential properties of the digital input modules.
Table 3- 2 Digital input modules
Order no.: 6ES7521-1BH00-0AB0 6ES7521-1BL00-0AB0 6ES7521-1BH50-0AA0 6ES7521-1FH00-0AA0
Short description DI 16x24VDC HF DI 32x24VDC HF DI 16x24VDC SRC BA DI 16x230VAC BA
Number of inputs 16 32 16 16
Electrical isolation
between channels
No Yes No Yes
Number of potential
groups
1 2 1 4
Rated input voltage 24 VDC 24 VDC 24 VDC 120/230 VAC
Diagnostic error
interrupt
Yes Yes No No
Hardware interrupt Yes Yes No No
Isochronous
operation supported
Yes Yes No No
Input delay 0.05 ms to 20 ms 0.05 ms to 20 ms 3 ms 25 ms
Reference
Further information on the technical specifications of the modules may be found in the
respective manuals.