SB 1221

Description

Signal board 1221 provides 4 digital inputs for voltages from 5-24V, depending on the used model. It is easy to install, by mounting it directly in the S7-1200 CPU. The maximum allowable current for the ball zero varies 1.4m-2.2 mA, while the minimum current for the logic unit ranges 5.1-7mA. The cable that connects to the input can be up to 50m long. Since diagnostics, this module has only LED indicators that give feedback on the correct operation.

Standard

SiemensSB 1221

The Siemens Digital input SB 1221 is a signal board that serves as an aid in integrating with the S7-1200 and enables the connection of the controller to digital signals.

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