Issue
What if any voltage can be measured on a Micronet 2000 U-Bus?
Environment
- MicroNet 2000
- U-Bus communication
Cause
Information about voltage helps implement multiple MicroNet 2000 controllers in U-Bus communications interface.
Resolution
The U-Bus is a Wired-OR open collector communication bus talking at 2400 baud. The MN-ASDI has the U-Bus current source. It supplies the current for the U-Bus communications. It should supply about 45 ma. with short circuit protection. Under normal communications, the U-Bus voltage will be around 15 volts +/- 2 volts when measured with a voltmeter.
