siemens modules S7-300
origin:Germany
For flexible adaptation of PLC to respective task
For connecting of digital sensors

Digital input/output modules possess digital inputs/outputs for the automation system. Digital sensors and actuators can be connected via these modules.

Use of the digital input modules offers the following advantages for users:

Optimum adaptation;
the number of inputs/outputs can be adapted to the respective task using optional combination of modules. Superfluous investments no longer existFlexible process connection;
the automation system can be connected to the process using many different digital actuators and sensors
 

SM 321 digital input module
Digital inputs 
For connecting standard switches and two-wire proximity switches (BERO) 
6ES7 321-7BH01-0AB0   16 input DC 24V
6ES7 321-1BH02-0AA0   16 input DC 24V
6ES7 321-1BH50-0AA0   16 input DC 24V
6ES7 321-1BL00-0AA0   32 input DC 24V
6ES7 321-1BH10-0AA0   16 input DC 24V
6ES7 321-1FH00-0AA0   16 input AC 120/230V
6ES7 321-1EL00-0AA0   32 input AC 120/230V

SM 322 digital output module 
6ES7 322-1BH01-0AA0   16 output DC 24V 0.5A
6ES7 322-1BH10-0AA0   16 output DC 24V 0.5A
6ES7 322-1BL00-0AA0   32 output DC 24V 0.5A
6ES7 322-8BF00-0AB0   8 output DC 24V 0.5A
6ES7 322-8BH00-0AB0   16 output DC 24V 0.5A
6ES7 322-1BF01-0AA0   8 output DC 24V 2A
6ES7 322-1FH00-0AA0   16 output AC 120/230V 1A
6ES7 322-1FL00-0AA0   32 output AC 120/230V 1A
6ES7 322-1HH01-0AA0   16 output relays 2A
6ES7 322-1HF01-0AA0   8 output relays 2A
6ES7 322-1HF10-0AA0   8 output relays 5A
6ES7 322-5HF00-0AB0   8 output relays 5A

SM 323/SM 327 digital input/output modules
6ES7 323-1BH01-0AA0   8 input / 8 output DC 24V
6ES7 323-1BL00-0AA0   16 input / 16 output  DC 24V
6ES7 327-1BH00-0AB0   8 DI / 8 DX