Baldor MN605, Installation And Operating Manual

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2-3 MN605
Figure 2-1 Encoder Connections
Thermostats The thermostat is a pilot circuit device used in a protective relay circuit. Thermostat ratings are given in Table 2−3.
Table 2-3 Thermostat Ratings
Maximum Current Ratings for Thermostats (Normally Open or Closed Contacts)
Voltage 125VAC 250VAC 24VDC Continuous Current All Voltages
Amperage 12A 8A 2A 2A
Blower Ventilation System
Before loading a force-ventilated motor, be sure that the blowers, cooling fans, or central air supply systems
are operating properly to supply cooling air to the motor. Air filters should also be in place. If you energize the
main fields with the motor at standstill, the blowers or external cooling systems must be left on. This will prevent
excessive heat buildup that will decrease the life of the insulation.
When using field economy circuits to reduce the voltage to the main fields during standstill, blowers do not need
to be left on.
Blower motors should be checked for correct rotation. Don’t rely on feeling airflow from the drive end of the
motor. Look at the outline drawing or rotation arrow shown on the blower housing. Refer to Figure 2-2.
Figure 2-2 View from Air Inlet (Motor is on Opposite Side)
Table 2-4 Electrical Data - Forced Ventilation Blower Units
Size Motor Frame HP RPM Volts Phase Hz Amps
LM2 180 1/40 3000 230 1 60 0.4
LM3 180 1/8 3450 115/230 1 50/60 2.6/1.3
LM3 210-250 1/8 3450 208-230/460 3 50/60 0.66-0.60/0.30
LM4 280 1/3 3450 208-230/460 3 50/60 1.5-1.4/0.7
LM6 320-400 1 3450 208-230/460 3 50/60 3.1-3.0/1.5
LM8 504-506 3/4 1750 208-230/460 3 50/60 3.4-3.2/1.6
LM9 508-5012 3 3450 208-230/460 3 50/60 8.2-7.6/3.8
Note: Motor mounted blower units. Mount on commutator end (opposite drive end of motor. We supply blowers that are powered by totally enclosed motors (standard).
Blowers have a cast aluminum fan housing with washable, wire mesh filters.
A B
K
H
G J C
F E D
A
H
B
J
C
K
D
F
E
A
A
B
B
C
C
+5V
COMMON
Electrically
Isolated
Encoder
Color Codes for Optional
Baldor Encoder Cable
Standard Receptacle MS3112W12−10P
Standard Plug MS3116J12−10S
Air Inlet
Housing
Impeller
Blades
Airflow