Revision B MX28B-1200 PRODUCT MANUAL MX28B-1200/2400 11
distribution section with the front cover removed.
Alternate circuit breaker configurations are available in order for the power frames to provide
support for larger individual load connections. Six circuit breakers in the 100 amp to 400 amp
range or four circuit breakers in the 225 to 700 amp range in a panel-mount arrangement can be
specified instead of the distribution module with 48 plug-in breakers.
Optional power distribution box frames can be added to a power system to support additional
circuit breakers or telecom fuses. Auxiliary alarm contacts from circuit breakers can be brought
back to the control unit through the use of an alarm extension printed circuit board in each bay.
Ten fuses outputs can also be directly monitored by the control unit.
4.8 Environmental
•=Ambient Temperature: -20°C to +65°C operating
-40°C to +85°C storage
•=Humidity: 0% to 85% RH non-condensing operating
0% to 95% RH non-condensing storage
•=Altitude: Up to 3000m, operating
Up to 10,000m, storage
4.9 Mechanical
•=Weight: Base Power Frame – 400 to 600 lbs. (181 to 272 kg)
Extension Power Frame – 400 to 600 lbs. (181 to 272 kg)
Rectifier - 11 lbs. (5 kg.)
•=Dimensions Box Frame: 84” high x 26” wide x 26” deep
(2134 mm x 660 mm x 660 mm)
•=Color: Dawn Gray (fronts)
4.10 Compliance
•=Safety UL 1950