Product Name: LOGO Digital I/O Module

Brand Name: Siemens 

Model: 6ED1055-1NB10-OBA0

Power Supply: 12/24V DC 

Digital Input: 04 (24V DC) 

Digital Output: 04 (Relay)

Origin:    China

Condition: Used

Warranty: 01 years

Programming Software: LOGO Soft Comfort

Programming Cable: LOGO PLC Cable

User Manual: Link

A wide range of expansion modules allows to set up an individual LOGO! configuration. 
The maximum depends on the used basic module. 
LOGO! 8: 
24 digital inputs, 20 digital outputs, 8 analog inputs and 8 analog outputs! 
LOGO! 6 and LOGO! 7: 
24 digital inputs, 16 digital outputs, 8 analog inputs and 2 analog outputs!

If you do networking of several LOGO! 8 or LOGO! 7 one configuration can be expanded to overall 88 digital inputs, 80 digital outputs, 40 analog inputs and 18 analog outputs. 
LOGO! 6 and LOGO! 7 can also be connected to AS-interface and KNX sytems. 

To combine different voltage levels you have to keep the following rule: 
The basic module must be a 230 V version followed by 230 V expansion modules. Then an analog module must be used to achieve a galvanic isolation. Right from the analog module further analog modules or 12V / 24 V expansions can be attached.