SNK
Member
People, I have been experiencing numerous bus faults on my DeviceNet card installed in a system that has been running for about 6 months. The problem has been reoccurring since the conception of the project, but was never taken care of properly.
All of the busses are powered and configured, and when the system is working, it works flawlessly. However, if there is a power down, the system does not see the bus-system in full, and sometimes blinks a red light on the bus-fault indicator.
I have researched the PS issue, knowing that the Devicenet is very suceptable to noise. Currently, we are using an OMRON PS that feeds the whole 24VDC circuits.
I am investigating replacing the OMRON with a AB 1787-DNPS As described below.
What do you think?
The DeviceNet stand alone power supply (1787-DNPS) provides 24V dc network power for devices connected to DeviceNet taps. It is a UL/CSA class-2 power supply, which is required by the National Electrical Code (NEC) for a power bus such as the DeviceNet cable system. If the DeviceNet cable system is installed as building wiring, it must be meet NEC requirements; in particular, article 725.
All of the busses are powered and configured, and when the system is working, it works flawlessly. However, if there is a power down, the system does not see the bus-system in full, and sometimes blinks a red light on the bus-fault indicator.
I have researched the PS issue, knowing that the Devicenet is very suceptable to noise. Currently, we are using an OMRON PS that feeds the whole 24VDC circuits.
I am investigating replacing the OMRON with a AB 1787-DNPS As described below.
What do you think?
The DeviceNet stand alone power supply (1787-DNPS) provides 24V dc network power for devices connected to DeviceNet taps. It is a UL/CSA class-2 power supply, which is required by the National Electrical Code (NEC) for a power bus such as the DeviceNet cable system. If the DeviceNet cable system is installed as building wiring, it must be meet NEC requirements; in particular, article 725.