Sizable installation savings are realized over conventional systems when installing a DeviceNet network. The following is an estimate of installation costs of a conventional system versus DeviceNet (costs are listed in the amount per device):
This analysis is typical of an installation of 20 automated valve systems located in a cluster approximately 150 feet from the I/O rack. Each of the automated valves is located 20 feet apart in the cluster.
The StoneL DeviceNet I/O module and VCT have an auxiliary 4 to 20mA input that is bus powered. (No additional power is needed.) Other analog instrumentation such as flow meters, level controls, pressure sensors, etc. may be wired directly into the module, cutting installation costs further.