Field Connection (Shunt Wound Motors Only) - Baldor BC142 Installation And Operation Manual

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.
Catalog No.
BC141
BC142
BC142-6
* Step-down operation.
14
TABLE 4 – FIELD CONNECTION (Shunt Wound Motors Only)
AC Line Input Voltage (Volts AC)
115
208 / 230
115
208 / 230
208 / 230
Armature Voltage (Volts DC)
0 - 90
0 - 180
0 - 90*
0 - 90
0 - 180
0 - 90*
Field Voltage (Volts DC) Terminal Connections
100
50
200
100
100
50
200
100
F+, F-
F+, L1
F+, F-
F+, L1
F+, F-
F+, L1
F+, F-
F+, L1