ABSTRACT
Proper wiring, installation, and commissioning forms the basis of successful operation of a fieldbus based system. Manufacturers’ data sheets must be consulted before commissioning.
For proper operation, terminators are placed on either side of a segment. Surge protectors must be used for systems prone to lightning strikes. A fully operational fieldbus system requires network interface cards, hubs, repeaters, switches, bridges, routers, gateways to work properly.
Fieldbus cables must be shielded from electrical sparks and protected from mechanical damage. Lengths of trunk cable and spurs must adhere to established procedures.
Signal polarity and power polarity must be the same for bus powered devices, while non-polar bus powered devices can accept power and signal of either polarity.
For a system consisting of many devices having trunks and spurs, the following must be taken into consideration: supply voltage, current requirement of each device, location of power supply, resistance of every part of the network.
A device has a device ID, device tag, and device address. Users identify a device based on tag and node address. A host is commissioned with the help of device support files and configuration tools.
