Baldor BSC 7107 DC manual Sensor and Motor Connections Refer to Figure

Sensor and Motor Connections Refer to Figure 2-2.

Brushless DC motors have eleven (11) wires: three (3) motor phase power wires, three (3) hall sensor wires, two (2) wires for hall sensor power and sensor common, one (1) wire for motor ground and two (2) wires for motor thermal switch.

Note: Baldor BLDC motors have 120° Hall sensor spacing.

1.	Verify that the 60°/120° jumper is in the 120° position.
2.	Verify that the Speed Potentiometer is set to zero (5KW pot is set
	fully CCW).
3.	Place a 0-10A AC AMP meter in series with the source. This allows
	measurement of AC current during power up testing.
4.	Connect the three motor leads to P1 terminals as follows:
	Motor Function	P1 Terminal	BSM50A	Threaded
			Lead Color	Connector Pin #
	U	Φ1	Red	1
	V	Φ3	Black	4
	W	Φ2	Blue	3
5.	Connect the motor ground to Earth.
6.	Connect the three hall sensor wires (S1, S2 and S3) to P4 terminals
	S1, S2 and S3 of on the upper board.
7.	Connect the sensor power lead (red) to P4 terminal strip pin VR on
	the upper board.
8.	Connect the sensor power common lead (black) to P4 terminal strip
	pin COM on the upper board.

Note: The motor has an internal thermal switch (155°C ±5°C normally closed contact). The BSC7107 does not use this contact so no connection to the thermal switch leads is required.

2-4 Receiving & Installation