Siemens 6ES7 131-4BD01-0AA0 is a SIMATIC ET 200S digital input (DI) module.
Main specifications
Part number: 6ES7131-4BD01-0AA0
Type: 4-channel Digital Input, Standard
Input: 24 V DC
Number of inputs: 4 DI
Signal ON: +15 to +30 V DC
Signal OFF: −30 to +5 V DC
Typical input current: 7 mA at 24 V
Input delay: typically 3 ms
LED: Green status LED for each input
Diagnostics: No diagnostic function
Width: 15 mm
System: SIMATIC ET 200S / PROFIBUS