It is essential when installing the yellow AS-i cable to place it in a separate cableway to the power cables. It is also preferable to place it flat and to avoid twisting in order to optimize the symmetry between the two wires of the AS-i cable.

The installation of the AS-i cable on a surface connected to the electrical potential of the machine (the frame for example), is recommended in order to comply with the requirements of the EMC (Electro Magnetic Compatibility) directive.

The cable end (or ends for a bus in star configuration) must be connected to a T-piece or by ensuring that it does not protrude from the last connection point.

It is essential to distribute the power evenly over the AS-i bus so that each accessory connected to the bus is supplied with sufficient voltage to ensure that it operates correctly. To achieve this, it is necessary to observe the following rules.

Choose a power supply with a rating suited to the total power consumption of the AS-i segment. The available are ratings 2.4 A (TSX SUP A02) and 5A (TSX SUP A05).

A rating of 2.4 A is generally sufficient for an average power consumption of 65 mA per slave for a segment comprising a maximum of 31 slaves.

To minimize the effects of voltage drops and to reduce cable costs, it is necessary to determine the optimum power supply position on the bus, and also the minimum cable cross-section appropriate for the distribution of power.

The voltage drop should not exceed 3 V between the master and the last slave on the bus. The table below lists the elements necessary for choosing the cross section of the AS-i cable.

The cable that meets the requirements for the majority of applications is the cable with a 1.5 mm 2 cross-section. It is the standard model for the AS-i bus (cable offered in the Schneider catalog).

Cables of smaller cross-section can be used where the sensors consume very little power.