3300/14-01-20-00

3300/14-01-20-00 selects 20–34 Vdc input, 5.5 A maximum input current and standard power input module. The +26 Vdc nominal supply shuts down when the input goes outside its permitted range and automatically returns to normal operation when the input is restored within range.

The supply occupies the leftmost rack position beside the System Monitor and powers up to 12 monitors plus their associated transducers. A jumper on the Power Supply PWA selects -24 Vdc (+1.3%/-1.7%) or -18 Vdc (+1.6%/-2.2%). Overload protection is provided for each individual channel on the monitor circuit boards; the chosen transducer supply must match the installed channels.

A normally energized, hermetically sealed SPDT OK relay is located on the Power Input Module behind the supply. Bently Nevada recommends an external annunciator because loss of primary power, monitor function or critical wiring can compromise machinery protection. Review the System Monitor, backplane and monitor firmware together. A 3300/14 used with an Original backplane requires an Original Power Input Module, and it is not compatible with the 3300/01-02 System Monitor. Approval option 00 does not specify an agency approval. Assess any hazardous-area requirement at the complete installed-system level.