The terminal modules form the interface between the I/O connecting cables from the field and the SIMATIC S7-300/ET 200M and S7-1500/ET 200MP. They allow simple and secure connection of almost all SIMATIC S7-300 and S7-1500 programmable controllers.
For connecting to the front connector modules, one connecting cable is used per byte or per analog terminal module (on SIMATIC S7-300/ET 200M or S7-1500/ET 200MP only). In the case of the 2 x 16-pole round-sheath ribbon cable, two bytes can be connected. Up to 4 terminal modules are connected via the connecting cables, depending on the front connector module. Up to 8 signal channels are run via the 16-pole connecting cable.
Use of the appropriate front connector module allows 32 channels to be routed via a single line to the terminal module provided for this purpose.
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.
Distance
A distance of up to 30 m is permitted between the SIMATIC S7 and the terminal modules. This depends on the requirements in each case and is at the discretion of the configuring engineer.