The terminal modules form the interface between the I/O connecting cables from the field and the SIMATIC S7-400. This allows simple and secure connection of almost all SIMATIC S7-400 family automation devices.

Connection to front connector modules

For connecting to the front connector modules, one connecting cable is used per byte or per analog terminal module. Up to 8 signal channels are run via the 16-pole connecting cable.

Terminal modules

There is a choice of different connection concepts with associated terminal modules. The terminal modules are latched onto the mounting rail in place of terminal strips or coupling modules. Passive and active terminal modules (function modules) are available. The function modules are fitted with coupling elements. The I/O terminals on the terminal module are available with spring-loaded or screw-type terminals as standard. The digital terminal modules are optionally available with LEDs. The LEDs on the terminal module are assigned to every signal path, and these LEDs indicate the signal state "active high". The power supply is indicated by a different LED.

Accessories

Insertable labels are available for the housing cover for individual and unique system labeling of the terminal modules. They are suitable both for the basic modules and the signal and function modules.