Usable BaseUnits

For a single- or multi-conductor connection, BaseUnits with an appropriate number of terminals are available.

A light BaseUnit opens a new load group. The power supply to the sensors must be fed via this BU. The first BU next to the interface module must always be a light BU.

A dark BaseUnit forwards the power supply of the adjacent light BaseUnit on the left via self-assembling voltage buses. A new infeed is therefore only required on the next light BaseUnit to the right.

All variants that correspond to the BU type of the I/O module can be used as BaseUnits.

Color identification of the terminals

The potentials at the terminals of the BaseUnit are defined by the I/O module. Optionally, the potentials of the terminals can be identified by module-specific color-coding labels to prevent wiring errors. The color-coded label that matches the respective I/O module is defined by the color code CCxx of the I/O module. This color code is also printed on the front of the module.

In BaseUnits with the 10 internally jumpered AUX terminals, these can also be identified with color coding labels. For the 10 AUX terminals, color-coding labels are available in red, blue, and yellow/green.

System-integrated shielded connection

For the connection of cable shields that is both space-saving as well as optimized in terms of EMC, a shield connection is available that is quick and easy to mount. This consists of one shield connection element that can be plugged onto the BaseUnit and one shield terminal for each module. The low-impedance connection to the functional ground (DIN rail) is achieved without any additional wiring by the user.