Baldor BC142 - Field Connection (Shunt Wound Motors Only)

6.2 Ground Connection – Connect the ground wire (earth) to the control chassis.
6.3 Permanent Magnet (PM) Motor Connection – Wire the motor armature positive lead (+) to Terminal “A+”
(Armature Fuse) and the negative lead (-) to Terminal “A-”, as shown in Figure 1, on page 10. On Catalog
Nos. BC142 and BC142-6, be sure Jumper J2 is set to the corresponding motor voltage, as described in
Section 7.2, on page 20. Be sure the correct Plug-In Horsepower Resistor® is installed, as described in
Section 9, on page 21.
6.4 Motor Field Connection (Shunt Wound Motors Only)
6.4.1 Full Voltage Field – Wire the field positive (+) lead to Terminal “F+” and the negative lead (-) to
Terminal “F-”, as shown in Figure 1, on page 10, and as described in Table 4.
6.4.2 Half Voltage Field – For 90 Volt DC motors with 50 Volt DC fields and 180 Volt DC motors with 100
Volt DC fields, wire the field positive lead (+) to Terminal “F+” and the negative lead (-) to Terminal “L1”
(Line Fuse), as described in Table 4.
Notes: 1. Do not connect motor armature leads to Terminals “F+” and “F-”. 2. Do not use Terminals “F+”
and “F-” for any purpose other than to power the field of a shunt wound motor. 3. Shunt wound motors
may be damaged if the field remains energized without armature rotation for an extended period of time.
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Catalog No. AC Line Input Voltage (Volts AC) Armature Voltage (Volts DC) Field Voltage (Volts DC) Terminal Connections
BC141 115 0 - 90
100 F+, F-
50 F+, L1
BC142 208 / 230
0 - 180 200 F+, F-
0 - 90* 100 F+, L1
BC142-6
115 0 - 90
100 F+, F-
50 F+, L1
208 / 230 0 - 180 200 F+, F-
208 / 230 0 - 90* 100 F+, L1
TABLE 4 – FIELD CONNECTION (Shunt Wound Motors Only)
* Step-down operation.