Conexión modular

The modular connection for connecting to the digital and analog I/O modules of the SIMATIC S7-400 consists of modified front connectors with four round cables and terminal modules. Suitable components can be selected for the application in question and joined by means of simple plug-in connections. The terminal modules are used instead of conventional terminal blocks and act as the interface to the sensors and actuators.

• Pre-assembled front connectors and terminal modules are easy to plug in
• Fast and low-cost wiring
• For digital and analog signals, supply voltage can be connected to the terminal module
• Reduction in wiring errors, clear control cabinet wiring
• Four byte distribution of the signals in the case of digital signals
• Each component can be replaced individually
• Available in two different lengths (2.5 m and 5.0 m)

Pre-assembled front connectors

Pre-assembled front connectors are available for connecting to the I/O modules. These are plugged into the I/O module to be wired instead of the front connector. The front connector modules are available in a wide range of designs for digital and analog I/O modules. The terminal modules are attached to these front connectors.

The modular solution is available in two different lengths (2.5 m and 5.0 m) The digital solution is with unshielded cables, the analog solution is with shielded cables. The cable cross-section is 0.14 square mm.

Connection module

The system has digital and analog terminal modules for connecting the I/O signals. These are snapped onto the standard mounting rail. The terminal modules with basic or signal functionality are available in a 1-byte version.

Terminal modules are available for two different connection methods: with push-in or screw-type terminals The potential must be fed in at the terminal module.

If other voltage or power levels are required in the field, the terminal module for TPRo or TPOo output signals is used. For the TPRo terminal module, relays are used for the implementation. For the TPOo terminal module, optocouplers are used for the implementation. This converts the 24 V DC output signal simply and reliably to another voltage or power level. If 230 V AC or 110 V AC input signals have to be transmitted to the controller in the field, a connection module with relay TPRi is available that simply converts the 230/110 V AC signal to 24 V DC. This means that there is always the same voltage level on the module side.

Use with optocouplers for the TPRo relay modules

If higher switching frequencies of the relay terminal module are required for the output signals, the relay can simply be replaced with an optocoupler (note technical specifications) in order to increase the switching frequency here.

SIMATIC TOP connect for S7-1500/ ET200 MP, fully modular connection