Siemens Modules 6ES7221-1BH32-0XB0

The 6ES7221-1BH32-0XB0 module is a digital input module (SM 1221) for the Siemens SIMATIC S7-1200 Programmable Logic Controller (PLC) system. 

• Product Type: SM 1221 Digital Input Module.
• Function: It serves as an expansion module to add digital inputs to compatible SIMATIC S7-1200 CPUs.
• Number of Inputs: It features 16 digital input channels (DI).
• Operating Voltage: It uses a rated supply voltage of 24 V DC, with an allowable range of 20.4 V to 28.8 V DC.
• Input Type: It supports both sink (current sinking) and source (current sourcing) input connections.