GE Industrial Solutions Millennium II Controller J85501P-1 - Manual (Page 12)

Basic Installation and User’s Guide for the Millennium II Controller
Issue 3 January 2008 12
Resolution -40 to +85 °C: ±1.0% of full scale
0.01VDC
Safety And Standards Specifications
Electrostatic Discharge IEC 801-2 level 2, 4, 5
Radiated Emissions FCC Class B, CISPR 22 level B
Safety UL Unlisted Component as Part of GPS Power
System
NEBs Level 3 Tested and Complaint with Galaxy Power
Systems
It should also be noted that the Millennium II is suitable for use in power plants with or
without batteries. In batteryless plants, the loss of ac power causes an immediate loss of
dc power to the controller and the activation of all office alarm relays. When ac power is
restored, plant rectifiers will return to their last specified voltage set point, and the
controller will automatically return to its last configuration.
Hardware
Chassis
The Galaxy Millennium II, like its Millennium predecessor, is low-profile enclosure
mounted on the inside front cabinet door of a Galaxy Power System (GPS) plant. See
Figure 2-1, and 2-2. This arrangement occupies no space within the frame mounting
racks, thus allowing additional room for other plant equipment. The unit is pre-installed
in the factory for all applicable GPS configurations. However, it has been designed to be
backwards compatible to existing Millennium to allow field replacements or upgrades. It
is composed of two main components: a rust resistant metal enclosure and a clear plastic
cover. The metal enclosure interfaces with the cabinet door and provides appropriate
cable routing entrances to the circuit pack it secures. A maintenance friendly clear plastic
cover is used to protect the enclosed circuit packs. This cover also provides clear and
quick visibility to individual circuit pack alarm status indicators and all wiring
connections without removing a cover allowing quick board integrity and connectivity
checks without removing cover.