Direct wiring or via nodes:
Decide which solution is best for your application.
In the direct wiring configuration, bus communication takes place directly from the control unit to each individual positioning system, without the use of an additional bus distributor. Further positioning systems can be looped through the device’s second bus connection to the next device.
As a result the drives can be connected in a series (CANopen, PROFIBUS DP, DeviceNet and Modbus) or ring configuration (for all Ethernet-based buses). The advantage of this method is that the control unit will continue to receive signals even if one of the components in the series should develop a fault. The system power supply is provided using a separate cable.
With indirect wiring, the positioning systems are connected to the control unit via a hub / gateway. The positioning system’s power supply uses the same cable so it is only necessary to connect one cable to the device.
If the positioning systems are located in close proximity to each other, this bundling of the cables creates a “tidier“ machine appearance. A hub / gateway combines various components in the machine into a single unit.
The power supplies to the motor and the control unit are galvanically separated. This has the advantage that the bus signals remain active if the motor power supply is cut off, e. g. using an emergency stop switch.
Positioning systems in the 3 series can also be connected with the control unit indirectly via a hub using just one cable.
For IO-Link, a standard A-encoded cable is used for the bus communication and power supply.
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