2.3. DC Redundant Powering of Active MAXNET
®
Chassis
If more than one power supply is connected to the chassis, the extra power supply acts as a redundant source of power.
Using internal logic within the module (MNAC uses diode steering, MNDC uses load sharing logic) if the dominant power
supply in the chassis fails, the other power supply becomes the active supplier to the +24 VDC chassis backplane ensuring
that power is maintained to all active modules in the chassis.
2.4. Module Power Requirements
2.5. LED Indicator
The MNAC and MNDC power supply module have an LED indicator. The LED verifies, by lighting solid GREEN, that the
power supply is sup24 VDC to the Active MAXNET Chassis backplane.
2.6. Voltage Monitor
The MNAC and MNDC power supply module have test ports on the front panel. By connecting a DVM between the Pos
(RED) and Neg (Black) port, the chassis bac24 VDC level can be monitored.
2-2
MAXNET
®
– MNAC/MNDC Modular Power Supply – Installation & Operation Manual
CHAPTER 2: INSTALLATION
Figure #8: MNAC Front &
Rear Panel
MODULE
MNAC/MNDC
QMN870/QMN1000
MNRS/MNRSD
MNRSDAB
MAX CURRENT (AMPS)
3.6
0.42
0.07
0.07
Table #4: Module Power Requirements
Figure #9: MNDC Front &
Rear Panel
Figure #10: MNRPS Front &
Rear Panel
